EC-6 Core Subjects Science Practice Test Questions

Which of the following is equivalent to 200 centimeters? - Answer- 2 meters Of the following, which best demonstrates the use of an inquiry-based activity during a unit on physical properties of matter? - Answer- Separating a mixture, using the physical properties of its components. Of the following, which is the leading cause of preventable death in the United States? - Answer- Tobacco use When a vast amount of ash is expelled from a volcano during a catastrophic eruption, some of this ash can remain in the atmosphere for years. Which of the following changes in Earth's system most likely results from this situation? - Answer- Increased solar reflection leading to lower global temperatures Answer Of the following activities, which best introduces to students the process skill of classification? - Answer- Sorting a collection of objects into metals and nonmetals, then sorting the metals into magnetic and nonmagnetic A class has just completed a unit on the anatomy of a flower. Which of the following is the most effective way for a teacher to assess the students' understanding of the concept? - Answer- Having the students dissect a flower and label the parts An object is being acted on by a force of 20 N directed to the left and a force of 30 N directed to the right. What is the net force acting on the object? - Answer- 10 N to the right Of the following mixtures, which can be most effectively separated into its components using a mesh screen? - Answer- Sand and pebbles When wood burns, which of the following energy transformations occurs? - Answer- Chemical energy into heat energy As a demonstration during a unit on weather, a teacher adds food coloring to the bottom of a beaker of water being heated on a hot plate, and the students observe the movement of color in the water. Which of the following processes is illustrated by the movement of the color? - Answer- Convection Which of the following is the stage in the life cycle of a butterfly that is the major period of feeding and growth? - Answer- Larva