2. 7 th Grade Science Force, Motion, and Energy

3. A:B: Through the use of force to provide energy Through the use of energy to apply force C:D: Through the use of soil to create force None of these #1 How do seedlings break through the soil to come up?

4. B. Through the use of energy to apply force

5. A:B: Living things do not always need light to live. The sun provides the radiant energy needed by all living organisms to thrive C:D: Light is needed for respiration None of these #2 Why is the sun important to all living organisms on Earth?

6. B. The sun provides the radiant energy needed by all living things to survive and thrive

7. A:B: Sun – grass - deer Grass – sun - deer C:D: Deer – grass - sun None of these #3 Trace the path of sunlight from Sun to deer.

8. A.Sun – deer – grass (Sun provides energy for grass to grow. Deer gets energy from sun by eating the grass)

9. A:B: 150j 50j C:D: 300j None of these #4 Students wanted to see if using a ramp would lessen the amount of work needed to load a box into a truck that is 1 meter off the ground. It takes 150 N of force to lift the box without a ramp. It takes 50 N of force to lift the box with a 3 meter ramp. What is the amount of work required to move the box in both situations? (Work = Force x Distance)

10. A. 150j

11. A:B: No W = 150 x 1 W= 50 x 3 Both used 150j of work C:D: Both None of these #5 Students wanted to see if using a ramp would lessen the amount of work needed to load a box into a truck that is 1 meter off the ground. It takes 150 N of force to lift the box without a ramp. It takes 50 N of force to lift the box with a 3 meter ramp. Did the ramp cause the student to use less work? (Work = Force x Distance) Yes W = 150 x 1 W= 50 x 3 Both used 150j of work

12. B. No W = 150 x 1 W= 50 x 3 Both used 150j of work

13. A:B: S = 38 km/hrS = 38 hrs #6 Measure Speed What is your speed if you travel 114 km in 3 hours? Speed = Distance Time C:D: S = 38 kmS = 3 km/hr

14. A. S = 38 km/hr

15. A:B: Graph A Graph B C:D: Graph CNone of these #7 Which of these graphs shows a speed that is not changing (constant speed)

16. C. Graph C

17. Great Job!!!! Great Job!!!! Thank you for playing! Thank you for playing!