WGU C165 PRE-ASSESSMENT: INTEGRATED PHYSICAL SCIENCES (MTC1) (PMTC) 70 QUESTIONS AND ANSWERS 100% CORRECT

10/11/25, 10:36 AM WGU Student Portal Accessibility Policy Accessibility Settings 1/31 Downloaded by Mike Splendid () PRE-ASSESSMENT: INTEGRATED PHYSICAL SCIENCES (MTC1) (PMTC) Help Articles Attempt #2 Status: Not Passed 1. Which question could be answered with a controlled experiment? YOUR ANSWER CORRECT ANSWER Does ice melt faster in an empty glass or in a glass full of water? Do all planets have the same shape of orbit around the sun? What is the maximum distance between Earth and Jupiter? What is the length of the longest river in North America? 2. Which topic would be appropriate for a controlled experiment? YOUR ANSWER CORRECT ANSWER Determining how fast different chemical pollutants dissolve in water Comparing the elements present in different stars Measuring how fast a river flows Predicting the path of a tornado 3. Which question requires a controlled experiment to answer? YOUR ANSWER CORRECT ANSWER Which type of rock contains the most calcium? Which planet has the most moons? Which elements are found in Earth's atmosphere? Which fossils formed earliest in Earth's history?10/11/25, 10:36 AM WGU Student Portal Downloaded by Mike Splendid () 4. Sir Isaac Newton discovered that the force of gravity between two masses increases if the masses increase, and decreases if the distance between the masses increases. No experiments have ever contradicted this relationship. Which type of scientific statement is this? YOUR ANSWER CORRECT ANSWER Hypothesis Theory Law Inference 5. The well-accepted scientific explanation for many characteristics of Earth's crust states that the crust is broken into several large plates. These plates move slowly over the mantle below because of convection and other processes. Earthquakes and volcanoes are most common at places where the plates interact. Evidence from physics, chemistry, and geology supports this explanation. Which type of scientific idea is this explanation an example of? YOUR ANSWER CORRECT ANSWER Hypothesis Theory Law Prediction 6. A student proposes that sugar will dissolve faster in rubbing alcohol than in water. The student reasons that sugar and rubbing alcohol both contain carbon so they will mix more easily. Which type of scientific idea is the student's proposal an example of? YOUR ANSWER CORRECT ANSWER Hypothesis Theory Law Accessibility Policy Accessibility Settings reassessment-report/v1/studentPidm/1088131/assessmentCode/PMTC/testDate/175 2/3110/11/25, 10:36 AM WGU Student Portal Downloaded by Mike Splendid () How should scientists appropriately respond to the idea that some new mechanism of forming the volcanoes is involved? YOUR ANSWER CORRECT ANSWER Observation 7. Why was the shrinking Earth idea replaced by the theory of plate tectonics? YOUR CORRECT ANSWER ANSWER Plate tectonics was a new theory, which made it more reliable. Plate tectonics explained observations about Earth that the shrinking Earth idea could not explain. Geologists voted on which theory to accept, and chose plate tectonics. Many well-known geologists were involved in proposing plate tectonics. 8. Astronomers have long accepted that plate tectonics exists nowhere in our solar system except on Earth. In 2011, a scientist analyzed 100 NASA-space-mission photographs of Valles Marineris on Mars, the longest known series of canyons in the solar system. The scientist found that Valles Marineris showed features found only in locations on Earth where major tectonic plates divide. What would be the appropriate response of scientists to this information? YOUR ANSWER CORRECT ANSWER Reject plate tectonics on Mars as the explanation because it contradicts accepted science Decide whether to accept plate tectonics on Mars based on the reputation of scientists involved Hold public debates among scientists and then vote whether plate tectonics occurs on Mars Carry out further research to gain more understanding of possible plate tectonics on Mars 9. According to the theory of plate tectonics, volcanoes are especially likely to form along plate boundaries because of rising magma. New satellite data mapping the ocean floor reveals thousands of seamounts, which are small volcanoes. Some of the seamounts are in lines that could correspond to past or present plate boundaries, but many are not aligned in this way.10/11/25, 10:36 AM WGU Student Portal Downloaded by Mike Splendid () YOUR ANSWER CORRECT ANSWER Reject it because it contradicts the theory of plate tectonics Accept it if the person proposing it is a credible expert on plate tectonics. Carry out more research to understand better how the seamounts form Stage public debates to get a consensus on how the seamounts form 10. For many decades, scientists thought they understood how ozone breaks down in the stratosphere, creating ozone holes. However, new data show significantly lower reaction rates than can be explained by the long-held model. What is the appropriate scientific approach for dealing with this contradiction? YOUR ANSWER CORRECT ANSWER Conduct additional experiments to confirm the new data Ignore the new data because it contradicts the accepted model Ask the general public to vote on which data are correct Accept whichever data the most famous scientists support 11. For almost 1500 years most scientists in Europe accepted Ptolemy’s geocentric planetary model that suggested the sun revolved around Earth. By the eighteenth century, most scientists supported a heliocentric model that suggests that Earth revolves around the sun. What is an appropriate scientific basis for this change in view? YOUR ANSWER CORRECT ANSWER The most prominent scientist that supported the geocentric model died The existing theory was changed to account for new data The old theory was voted down by a scientific council The heliocentric model was supported by a popular scientist Accessibility Policy Accessibility Settings reassessment-report/v1/studentPidm/1088131/assessmentCode/PMTC/testDate/175 4/3110/11/25, 10:36 AM WGU Student Portal Downloaded by Mike Splendid () reassessment-report/v1/studentPidm/1088131/assessmentCode/PMTC/testDate/175 12. Two scientists announced that they were able to produce nuclear fusion in the laboratory. However, many other scientists attempted the same experiment and none were able to replicate the results. What is the appropriate scientific approach for dealing with this contradiction? YOUR ANSWER CORRECT ANSWER Accept the first scientists’ discovery because it will solve our energy needs Reject the first scientists’ discovery because the results could not be confirmed Assume that nuclear fusion can occur randomly during experiments Ask for a popular vote on which results to accept 13. A woman does pushups by lowering her body to the floor using her arms and then pressing against the floor with her hands to push herself back up, as shown in the image below. Which force causes her to rise? YOUR ANSWER CORRECT ANSWER The downward force of gravity that Earth exerts on the woman The downward force that the woman’s arms exert on the ground The upward force that the ground exerts on the woman The upward force that the woman’s arms exert on the ground 14. Two boxes sitting on the floor look identical, but one has more mass than the other. What happens when the same net force, sufficient to overcome static friction, is applied to each box? Accessibility Policy Accessibility Settings 5/3110/11/25, 10:36 AM WGU Student Portal Downloaded by Mike Splendid () YOUR ANSWER CORRECT ANSWER The box with less mass accelerates more. The box with more mass accelerates more. Both boxes accelerate at the same rate. Both boxes remain at rest. 15. Ball 1 and ball 2 have the same mass and are traveling at the same speed. The two balls collide head on and stick together in an inelastic collision. Assume there is no friction. What happens to the motion of the balls after the collision? YOUR ANSWER CORRECT ANSWER They stick together and remain at rest. They bounce off each other and then come to rest. They stick together and move to the right. They bounce off each other and move in opposite directions. 16. Which force keeps Jupiter in orbit around the Sun? YOUR ANSWER CORRECT ANSWER Air resistance Gravity Kinetic friction Accessibility Policy Accessibility Settings reassessment-report/v1/studentPidm/1088131/assessmentCode/PMTC/testDate/175 6/3110/11/25, 10:36 AM WGU Student Portal Downloaded by Mike Splendid () YOUR ANSWER CORRECT ANSWER Magnetism 17. Which force causes a jet airplane to stop on a runway? YOUR ANSWER CORRECT ANSWER Friction Gravity Tension Centripetal Force 18. Which force causes meteors to burn up when they enter Earth’s atmosphere? YOUR ANSWER CORRECT ANSWER Friction Gravity Magnetism Tension 19. A slingshot is a Y-shaped stick with rubber bands between the prongs for shooting stones and other small projectiles. A stone is shot by first placing it in the slingshot holder, which is attached to the rubber bands. The stone and holder and then pulled back, stretching the rubber bands. When released, the stone is propelled forward and leaves the slingshot at a high speed. Which type of energy transformation occurs from the point when the rubber bands are fully stretched to when the stone leaves the slingshot? YOUR ANSWER CORRECT ANSWER Chemical potential energy is converted into gravitational potential energy. Gravitational potential energy is converted into thermal energy. Elastic potential energy is converted into gravitational potential energy. Accessibility Policy Accessibility Settings10/11/25, 10:36 AM WGU Student Portal Downloaded by Mike Splendid () 23. A cashier who has been handed a hundred-dollar bill may check its authenticity by holding it under a special lamp that emits electromagnetic radiation mostly at wavelengths slightly shorter than visible YOUR ANSWER CORRECT ANSWER Elastic potential energy is converted into kinetic energy. 20. What energy conversion takes place as a box slides to a stop on a horizontal table? YOUR ANSWER CORRECT ANSWER Kinetic energy is converted into thermal energy. Gravitational potential energy is converted into kinetic energy. Chemical potential energy is converted into gravitational potential energy. Elastic potential energy is converted into gravitational potential energy. 21. What energy conversion occurs in a car's engine? YOUR ANSWER CORRECT ANSWER Kinetic energy is converted into elastic potential energy. Gravitational potential energy is converted into electrical potential energy. Chemical potential energy is converted into thermal energy. Thermal energy is converted into gravitational potential energy. 22. Which kind of electromagnetic radiation carries information to and from a cell phone when it is used for a phone call? YOUR ANSWER CORRECT ANSWER Microwaves X-rays Infrared radiation Ultraviolet radiation Accessibility Policy Accessibility Settings reassessment-report/v1/studentPidm/1088131/assessmentCode/PMTC/testDate/175 8/3110/11/25, 10:36 AM WGU Student Portal Downloaded by Mike Splendid () reassessment-report/v1/studentPidm/1088131/assessmentCode/PMTC/testDate/175 light. The electromagnetic radiation makes a pattern of previously invisible markings on the bill glow brightly, or fluoresce. Which kind of electromagnetic radiation does the lamp emit to produce this effect? YOUR ANSWER CORRECT ANSWER Microwaves Infrared radiation Ultraviolet radiation X-rays 24. After natural disasters, first responders can locate survivors in the rubble by using thermal detectors. Because the victims' bodies are warmer than their surroundings, the difference in temperature is detected by electromagnetic waves. Which part of the electromagnetic spectrum is being detected? YOUR ANSWER CORRECT ANSWER Radio waves Infrared radiation Ultraviolet radiation X-rays 25. Which type of wave has a longitudinal motion? YOUR ANSWER CORRECT ANSWER Gamma waves Transverse waves Sound waves Light waves 26. Which statement correctly contrasts sound waves and electromagnetic waves? Accessibility Policy Accessibility Settings 9/3110/11/25, 10:36 AM WGU Student Portal Downloaded by Mike Splendid () YOUR ANSWER CORRECT ANSWER Sound waves are transverse waves, and electromagnetic waves are longitudinal waves. Sound waves can travel in a vacuum, but electromagnetic waves cannot. Sound waves travel faster than electromagnetic waves. Sound waves travel slower than electromagnetic waves. 27. Which is a characteristic of electromagnetic waves? YOUR ANSWER CORRECT ANSWER Transverse wave motion Travels faster through water than air Longitudinal wave motion Can travel only through a vacuum 28. According to the graph, how are time and the position of an object related? Accessibility Policy Accessibility Settings reassessment-report/v1/studentPidm/1088131/assessmentCode/PMTC/testDate/175 10/3110/11/25, 10:36 AM WGU Student Portal Downloaded by Mike Splendid () reassessment-report/v1/studentPidm/1088131/assessmentCode/PMTC/testDate/175 YOUR ANSWER CORRECT ANSWER The position of the object does not change over time. The position of the object and time are inversely proportional. The position of the object and time are proportional. Position and time are not correlated. 29. Which graph represents the relationship between an object's kinetic energy and velocity? YOUR ANSWER Accessibility Policy Accessibility Settings CORRECT ANSWER 11/3110/11/25, 10:36 AM WGU Student Portal Downloaded by Mike Splendid () YOUR ANSWER CORRECT ANSWER 30. Which graph represents the relationship between the mass and acceleration of an object when acted on by only gravity? Accessibility Policy Accessibility Settings reassessment-report/v1/studentPidm/1088131/assessmentCode/PMTC/testDate/175 12/3110/11/25, 10:36 AM WGU Student Portal Downloaded by Mike Splendid () reassessment-report/v1/studentPidm/1088131/assessmentCode/PMTC/testDate/175 YOUR ANSWER Accessibility Policy Accessibility Settings CORRECT ANSWER 13/3110/11/25, 10:36 AM WGU Student Portal Downloaded by Mike Splendid () Element YOUR ANSWER CORRECT ANSWER 31. Which subatomic particle is located outside the nucleus? YOUR ANSWER CORRECT ANSWER Proton Neutron Electron Ion 32. What charge does a neutron have? YOUR ANSWER CORRECT ANSWER Positive charge Negative charge No charge Variable charge 33. A chocolate chip cookie is made with dough and chocolate chips. Which type of substance is a chocolate chip cookie? YOUR ANSWER CORRECT ANSWER Accessibility Policy Accessibility Settings reassessment-report/v1/studentPidm/1088131/assessmentCode/PMTC/testDate/175 14/3110/11/25, 10:36 AM WGU Student Portal Downloaded by Mike Splendid () reassessment-report/v1/studentPidm/1088131/assessmentCode/PMTC/testDate/175 YOUR ANSWER CORRECT ANSWER Compound Mixture Mineral 34. Which example describes a compound? YOUR ANSWER CORRECT ANSWER A substance with only iron atoms A substance with sodium atoms bonded to chlorine atoms A substance with fluorine and nitrogen atoms that are not bonded together A substance with iron and aluminum atoms that are not bonded to each other 35. In which state of matter are particles close together, but able to slide past one another? YOUR ANSWER CORRECT ANSWER Liquid Solid Plasma Gas Accessibility Policy Accessibility Settings 15/3110/11/25, 10:36 AM WGU Student Portal Downloaded by Mike Splendid () Covalent Accessibility Policy Accessibility Settings 36. Which change of state does the image show? YOUR ANSWER CORRECT ANSWER Solid to liquid Liquid to gas Gas to solid Gas to liquid 37. Which action demonstrates a chemical change? YOUR ANSWER CORRECT ANSWER Cooking an egg Shredding paper Evaporating water Breaking a stick 38. Which type of bond is formed when valence electrons are shared between two atoms? YOUR ANSWER CORRECT ANSWER Ionic Mechanical reassessment-report/v1/studentPidm/1088131/assessmentCode/PMTC/testDate/175 16/3110/11/25, 10:36 AM WGU Student Portal Downloaded by Mike Splendid () reassessment-report/v1/studentPidm/1088131/assessmentCode/PMTC/testDate/175 YOUR ANSWER CORRECT ANSWER Metallic 39. Which properties will elements in group 2 share, based on location in the periodic table? Choose 2 answers YOUR ANSWER CORRECT ANSWER Good thermal conductivity Good electrical conductivity Poor thermal conductivity Poor electrical conductivity Accessibility Policy Accessibility Settings 17/3110/11/25, 10:36 AM WGU Student Portal Downloaded by Mike Splendid () More than 505 g 40. Consider the location of chlorine (Cl) on the periodic table. Which element has chemical properties that are similar to chlorine's? YOUR ANSWER CORRECT ANSWER Argon (Ar) Fluorine (F) Carbon (C) Sodium (Na) 41. A beaker contains 500 g of liquid water. An ice cube with a mass of 5 g is added to the water in the beaker. How many grams of liquid water are in the beaker when the ice has melted? YOUR CORRECT ANSWER ANSWER Less than 500 g 500 g 505 g Accessibility Policy Accessibility Settings reassessment-report/v1/studentPidm/1088131/assessmentCode/PMTC/testDate/175 18/3110/11/25, 10:36 AM WGU Student Portal Downloaded by Mike Splendid () Clouds forming on a summer day reassessment-report/v1/studentPidm/1088131/assessmentCode/PMTC/testDate/175 42. A chemist places 250 grams of liquid water into a beaker. The volume of the liquid water is 250 milliliters. The chemist then freezes the water. After it is frozen, the ice has a volume of 273 milliliters. What is the mass of the ice? YOUR ANSWER CORRECT ANSWER 250 grams Between 250 grams and 273 grams 273 grams More than 250 grams 43. When baking soda is added to vinegar, a chemical reaction occurs. The reaction produces carbon dioxide gas, and a liquid solution consisting mostly of water and a salt called sodium acetate. How is mass affected in this reaction, according to the law of conservation of matter? YOUR ANSWER CORRECT ANSWER The total mass of baking soda and carbon dioxide must equal the total mass of the liquid solution. The total mass of baking soda and vinegar must equal the total mass of carbon dioxide and the liquid solution. The total mass of baking soda and vinegar must equal the total mass of the liquid solution. The total mass of vinegar and water must equal the total mass of baking soda, carbon dioxide, and the liquid solution. 44. In which phase change is energy being absorbed from the surroundings? YOUR ANSWER CORRECT ANSWER A pond freezing over in winter Water boiling on an electric burner Molten glass solidifying into a vase10/11/25, 10:36 AM WGU Student Portal Downloaded by Mike Splendid () 45. What happens when wet clothes dry outside on a warm day? YOUR ANSWER CORRECT ANSWER The water in the clothes absorbs energy from the air and becomes a gas. The water in the clothes releases energy into the air and becomes a gas. The air absorbs energy from the water and changes the water into a gas. The air releases energy into the clothes and changes into liquid water. 46. Earth formed from dust and gases surrounding the sun. Which force pulled the dust and gases together to form Earth? YOUR ANSWER CORRECT ANSWER Gravitational Electrical Magnetic Frictional 47. A galaxy consists of many stars in the same large region of space. Which phenomenon leads stars to group together to form a galaxy? YOUR ANSWER CORRECT ANSWER Gravity between stars Electrical attraction Random coincidence Nuclear force between ions Accessibility Policy Accessibility Settings reassessment-report/v1/studentPidm/1088131/assessmentCode/PMTC/testDate/175 20/3110/11/25, 10:36 AM WGU Student Portal Downloaded by Mike Splendid () reassessment-report/v1/studentPidm/1088131/assessmentCode/PMTC/testDate/175 48. Which season is it in Japan and in Australia when Earth is in the position shown in the diagram? YOUR ANSWER CORRECT ANSWER Summer in both Japan and Australia Winter in both Japan and Australia Winter in Japan and summer in Australia Summer in Japan and winter in Australia 49. What is true during summer in the northern hemisphere? YOUR ANSWER CORRECT ANSWER Earth is closer to the sun than during the winter. Earth rotates more slowly than in the winter. The northern hemisphere receives more direct sunlight than in the winter. The northern hemisphere is tilted less toward the sun than in the winter. Accessibility Policy Accessibility Settings 21/3110/11/25, 10:36 AM WGU Student Portal Downloaded by Mike Splendid () arrows. 52. Accessibility Policy Accessibility Settings 50. Which position on the diagram represents Earth's location in its orbit during winter at a weather station near Earth’s south pole? YOUR ANSWER CORRECT ANSWER A B C D 51. A geologist is doing a risk assessment for a location where the African plate is moving away from the South American plate. Which risk description must the geologist give for this location? YOUR ANSWER CORRECT ANSWER There is high risk of volcanoes and low risk of large earthquakes. There is low risk of volcanoes and high risk of large earthquakes. There is high risk of both volcanoes and large earthquakes. There is low risk of both volcanoes and large earthquakes. reassessment-report/v1/studentPidm/1088131/assessmentCode/PMTC/testDate/175 22/3110/11/25, 10:36 AM WGU Student Portal Downloaded by Mike Splendid () Meander reassessment-report/v1/studentPidm/1088131/assessmentCode/PMTC/testDate/175 Which statement accurately describes these locations? YOUR ANSWER CORRECT ANSWER Volcanoes are more likely at location C than at location A. Large earthquakes are more likely at location A than at location B. Neither earthquakes nor volcanoes are likely at location B. Both earthquakes and volcanoes are likely at location D. 53. A river flows across a region. As the river flows, it erodes the rock beneath it. Which type of landform will develop if the river continues to flow along a straight path? YOUR ANSWER CORRECT ANSWER Valley Dune Glacier10/11/25, 10:36 AM WGU Student Portal Downloaded by Mike Splendid () 54. Which landform is produced when sediment is eroded from one side of a river and deposited on the other side? YOUR ANSWER CORRECT ANSWER Valley Dune Waterfall Meander 55. Where is metamorphic rock found in the rock cycle? YOUR ANSWER CORRECT ANSWER After erosion and deposition After folding and cracking After heat and pressure After melting and cooling Accessibility Policy Accessibility Settings reassessment-report/v1/studentPidm/1088131/assessmentCode/PMTC/testDate/175 24/3110/11/25, 10:36 AM WGU Student Portal Downloaded by Mike Splendid () reassessment-report/v1/studentPidm/1088131/assessmentCode/PMTC/testDate/175 56. A student makes the diagram of the rock cycle that is shown here. Which description should the student place on arrow A? YOUR ANSWER CORRECT ANSWER Melting and cooling Heat and pressure Erosion and deposition Folding and cracking 57. The rock layers shown in the illustration have not been disturbed or overturned. Accessibility Policy Accessibility Settings 25/3110/11/25, 10:36 AM WGU Student Portal Downloaded by Mike Splendid () Which type of environment was present in this region most recently, based on these rock layers? YOUR ANSWER CORRECT ANSWER A hot, high-pressure mountain A volcano A warm, shallow sea A magma chamber 58. The rock layers shown in the illustration have not been disturbed or overturned. Accessibility Policy Accessibility Settings reassessment-report/v1/studentPidm/1088131/assessmentCode/PMTC/testDate/175 26/3110/11/25, 10:36 AM WGU Student Portal Downloaded by Mike Splendid () Mesosphere reassessment-report/v1/studentPidm/1088131/assessmentCode/PMTC/testDate/175 What can be inferred about the geologic history of this area from these rock layers? YOUR ANSWER CORRECT ANSWER It has experienced frequent volcanic eruptions. It was exposed to high heat and pressure, and then experienced deposition. It experienced deposition, and then was exposed to high heat and pressure. It was once located in a magma chamber. 59. Through which layer of the atmosphere does a mountaineer climbing a tall mountain ascend? YOUR ANSWER CORRECT ANSWER Troposphere Stratosphere10/11/25, 10:36 AM WGU Student Portal Downloaded by Mike Splendid () YOUR ANSWER CORRECT ANSWER Thermosphere 60. A meteorologist is studying the formation of a hurricane. Which layer of the atmosphere is the meteorologist studying? YOUR ANSWER CORRECT ANSWER Troposphere Stratosphere Mesosphere Thermosphere 61. During heavy rains, the soil on a farm is washed away into a nearby river. Which parts of the water cycle result in this loss of soil? Choose 2 answers YOUR ANSWER CORRECT ANSWER Precipitation Infiltration Runoff Evaporation 62. Snow falls from the atmosphere and accumulates on a glacier. Which part of the water cycle does this process represent? YOUR ANSWER CORRECT ANSWER Precipitation Infiltration Evaporation Accessibility Policy Accessibility Settings reassessment-report/v1/studentPidm/1088131/assessmentCode/PMTC/testDate/175 28/3110/11/25, 10:36 AM WGU Student Portal Downloaded by Mike Splendid () The decrease in average humidity of the air from draining reassessment-report/v1/studentPidm/1088131/assessmentCode/PMTC/testDate/175 YOUR ANSWER CORRECT ANSWER Runoff 63. A gardener is working in a garden on a hot, humid day. Suddenly, clouds begin to form. Within a few hours, gusty winds and a thunderstorm are passing through the area. After the storms pass, the weather is clear and much cooler. What caused this change in weather? YOUR ANSWER CORRECT ANSWER A high pressure system rested over the area. A low pressure system rested over the area. A cold front moved through the area. A warm front moved through the area. 64. A hiker needs to select a day for a hike. The hiker examines weather forecasts for the next several days. Which day should the hike be planned for, if the hiker wants to hike on a clear day with no clouds? YOUR ANSWER CORRECT ANSWER A day when a high pressure system rests over the area A day when a low pressure system rests over the area A day when a warm front moves through A day when a cold front moves through 65. Which of these is an example of climate change caused by natural variation? YOUR ANSWER CORRECT ANSWER The low rainfall that helped produce the dust bowl in the American Great Plains The increase in the Sahara desert’s area from overgrazing by farm animals in North Africa10/11/25, 10:36 AM WGU Student Portal Downloaded by Mike Splendid () 69. Which renewable energy source is used to create electricity through the production of steam? swampland in an area The decrease of rainfall from cutting down the trees in a rainforest YOUR ANSWER CORRECT ANSWER 66. What is an example of climate change that can be caused by human activity? YOUR ANSWER CORRECT ANSWER Changes in average temperature from increases in atmospheric carbon dioxide Changes in average temperature from changes in the sun’s energy emission Changes in average temperature over Earth’s history from changes in Earth’s tilt Changes in temperature from the onset of the last ice age 67. Which feature is common to all of the terrestrial planets? YOUR ANSWER CORRECT ANSWER A dense atmosphere Liquid water oceans Tectonic plates A dense metallic core 68. Where are most of the asteroids in the solar system located? YOUR ANSWER CORRECT ANSWER Between the Sun and Mercury Between Earth and Mars Between Mars and Jupiter Between Saturn and Uranus Accessibility Policy Accessibility Settings reassessment-report/v1/studentPidm/1088131/assessmentCode/PMTC/testDate/175 30/3110/11/25, 10:36 AM WGU Student Portal Downloaded by Mike Splendid () reassessment-report/v1/studentPidm/1088131/assessmentCode/PMTC/testDate/175 YOUR ANSWER CORRECT ANSWER Geothermal Wind Solar Hydropower 70. Which type of energy source can be used in a country with close access to a volcanic zone? YOUR ANSWER CORRECT ANSWER Biomass Wind Water Geothermal Accessibility Policy Accessibility Settings 31/31