GED Science Actual Real Practice Exam Questions And Detailed Answers.

The process that allows the cells of an organism to use carbon from environment? - correct answer photosynthesis During photosynthesis in plants; what is the source of the carbon in the sugar molecule (C6H12O6) - correct answer carbon dioxide in the air Two positively charged objects - correct answer repel each other (Objects with like charge repel each other) What structure is not found in bacteria? - correct answer nuclear membrane What always stays the sane when a chemical reaction takes place? - correct answer the number of atoms All organisms have a cell wall. true or false? - correct answer true Natural selection - correct answer the process whereby organisms better adapted to their environment tend to survive and produce more offspring What is the source of genetic variation within a species?` - correct answer mutation What cannot grow in high concentrations of salt? - correct answer Bacteria Velocity - correct answer The time rate of change of displacement Equation for velocity? - correct answer v=d/t Light year - correct answer a unit of distance (9.4607 x 1015m) Property of metals - correct answer A. Good conductors of electricity B. Good conductors of heat C. Metals are malleable D. Metals are shiny and lustrous If we add oil, water and sweet syrup in a bottle, liquid layers are formed, but they do not mix. What is the reason that they do not mix? - correct answer Different density (Low densities float, and high densities sink) When two point sources of monochromatic light are kept at finite distance, we see alternating bright and dark rings. Which of the following phenomena is responsible for this effect? - correct answer Interference of waves (The phenomenon occurs because constructive and destructive interference of light waves. Points where constructive interference occurs appear bright while points where destructive interference occurs appear dark.) A drop of mercury and a drop of water are placed on a clean glass plate. While the water flattens, mercury remains almost spherical. This happens because: - correct answer Cohesion of mercury is greater than its adhesion with glass In the study of plants, What are thallophytes? - correct answer Algae (Thallophytes are plants that have no stem, roots or leaves.) Farmers could have a good yield of rice for a fairly long time without adding any nitrogenous manure because - correct answer There are nitrogen fixing blue green algae in the rice fields A man is running east-wards at the same time rain starts falling vertically downward. In which direction will the rain appear to be coming from to the man? - correct answer East (The rain that hits him comes from the East, while the rain above misses) Statements is true about constellation and galaxy - correct answer A. Milky Way is a galaxy. B. Milky Way contains our solar system. C. There are only about 88 constellations known. D. There are billions of galaxies known in the universe. Metals are lustrous because of - correct answer of presence of free electrons (A metal's outer band of mobile electrons will mostly reflect light.) Ozone - correct answer A gas in Earth's atmosphere (stratosphere) that is associated with intercepting much of the sun's harmful ultraviolet radiation What is the number of electrons present in H+ - correct answer 0 (Hydrogen atom (H) contains one electron and H+ represents Hydrogen ion, which means it has lost its only electron.) Johannes Kepler - correct answer Discovered The 'Laws of Planetary Motion' which comprises of three scientific laws describing the motion of planets around the sun While Ethyl alcohol (C2H5OH) is used for drinking but Methyl alcohol (CH3OH) is not used for drinking because - correct answer It is highly toxic Compared to terrestrial planets, the Jovian planets are - correct answer Larger in size and have lower densities (Jovian planets often known as gas giant are not primarily composed of rock and solid matter but gas, hence they have larger size but lower densities. There are four Jovian planets known in our solar system: Jupiter, Saturn, Uranus and Neptune.) Pollenation is best explained as - correct answer Transfer of pollen from anther to stigma Earthquakes occur due to the movement of tectonic plates. In which of the following layers of earth's crust does the movement occurs? - correct answer Lithosphere ( Core and mantle are below the crust. 'Astheno-' means 'weak' matter just below the stone [litho-] crust layer. 'Mesosphere' is atmospheric.) Nitrogen fixation is the process of - correct answer Conversion of atmospheric nitrogen (N2) into ammonium (NH4+) Corn - correct answer Is not a root vegetable Night blindness is caused because of deficiency of which vitamin? - correct answer Vitamin A Plants receive their nutrients mainly from - correct answer Soil What is a single strand of coiled DNA known? - correct answer Chromosome The area of biology dedicated to the study of fungi is known as? - correct answer Mycology Anemometer is device used to measure - correct answer Wind Which of the following is the first artificial satellite launched from earth? - correct answer Sputnik 1 The Sun produces energy by the nuclear fusion of ..................... into helium in its core. A. Hydrogen - correct answer Hydrogen Which of the following statement is true for taste in food? - correct answer Foods containing bases taste bitter Which of the following could be the most effective solution of getting relief from a bee-sting? - correct answer Baking soda (Sodium Bicarbonate) Brass is an alloy of which of following? - correct answer Copper and Zinc