8th Grade Science            Energy                          Name:

 

1. The Law of _____________________of _________________states that energy cannot be created nor destroyed.

 

2. If we use energy as we travel in a car, that energy is:

            (a) destroyed               (b) converted to another form

 

3. If we hear a sound traveling through air, and the air is then removed, what happens to the sound?

 

 

4. List the six colors of the spectrum of visible light:

 

 

 

 

5. List 3 forms of  electromagnetic radiation than visible light:

 

 

6. Most of the energy on earth comes from:            (a) the sun

                                                                        (b) radioactive decay

                                                                        (c) dead dinosaurs

 

7. Hurricanes we see in the Deep South originate in:

            (a) Gulf of Mexico                                 (b) Caribbean Sea

            (c) Atlantic Ocean                          (d) Sahara Desert in Africa

 

8. An ocean storm which is just below the threshold speed of a hurricane is a:

            (a) Tornado            (b) Tropical storm            (c) Cyclone

 

9. Why is warm water important to a hurricane?

 

 

 

10. Landfall is when a hurricane: (a) comes on shore   (b) trips    (c) speeds up

 

11. What happens to a hurricane’s speed once it makes landfall?

 

 

 

12. What unique thing can most plants do with sunlight?

 

 

13. Some sunlight falling on plants is converted to food.  Describe 2 things that can happen next to that food (or energy):

14. Label the parts of the wave shown:

 

15. As wavelengths become longer, the frequency  (a) increases     (b) decreases.

 

16. Hot springs and geysers result from energy from:

            (a) the sun       (b) radioactive decay               (c) dead dinosaurs

 

17. Sodium borosilicate glass (the type we used in the lab) develops which color in a flame just before it bends?

            (a) green    (b) red              (c) yellow  (d) no color change

 

18. Out of the flame, our hot glass appeared how (in comparison to cold glass)?

            (a) green    (b) red              (c) yellow  (d) no color change

 

19.  Someone is standing 4 meters away from you in an empty field.  They want to tell you something.  Which sound will reach you first: a loud shout or a quieter whisper?

 

 

20.  Which travels faster:    LIGHT      or        SOUND ?

 

21. Essay:            Describe how we can take one form of energy and convert it so we achieve some useful activity: