Chapter 1

1. Chapter 1 Motion and Momentum

2. distance • Speed is the rate of change in______

3. Speed and Direction • To describe velocity you need to know _____.

4. Time and Distance • When you graph the motion of an object, you put _______ on the horizontal axis and _______ on the vertical axis.

5. Direction • Acceleration involves a change in ______.

6. Velocity • Acceleration is a change in ____.

7. Zero • On a speed-time graph, a horizontal line shows the change in speed is ______.

8. A change in motion of an object • Inertia resists what?

9. Momentum • If you exert a force on an object in motion you will change its _______.

10. Speed • The distance traveled divided by the time taken to travel the distance is _____.

11. In the opposite direction of • When object A collides with object B and bounces back, its final momentum is _____ its initial momentum.

12. The truck plus the car • When a toy truck collides into a toy car, the momentum of ____ is the same before and after the collision.

13. How hard it is to stop an object • Momentum is a measure of _____

14. Worms • Which of the following is a biotic factor? • Climate • Sunlight • Worms

15. Respiration • Which process uses oxygen in plants, algae, and animals?

16. Humus • Decaying matter found in soil is called ____.

17. chemical • During photosynthesis, light energy becomes _______ energy.

18. proteins • Nitrogen is a necessary ingredient of ____.

19. bacteria • Which of the following eats consumers?

20. Plants and animals • Nitrogen in the soil is used by _____.

21. Carbohydrates, fats, proteins • The chemical energy in sugar molecules can be stored or used in what?

22. Food web • Which is a model of feeding relationships?

23. decreases • As you move upward, from level to level, in an energy pyramid, energy ____.