8th Grade Science Final

What class period are you in?

• 2
• 3
• 4
• 5
• 7

1. A student creates a ramp by stacking four blocks and then leaning a meter stick against it. She releases four different balls from the same position on the ramp and calculates their speeds. Based on the information in the table above, which ball would you predict to have the least kinetic energy when it reaches the end of the ramp?

• Golf ball
• Tennis ball
• Baseball
• Softball

2. A graph showing the kinetic energy of a 10 kg object at different speeds is provided. Based on the information in the graph, we can predict that the kinetic energy of the object at 2 m/s would be–

• 12 Joules.
• 20 Joules.
• 38 Joules.
• 44 Joules.

3. A graph showing the kinetic energy and speed of a moving object is provided. Which of the following can be concluded from the graph?

• Kinetic energy only changes when speed changes.
• Speed is only related to the size of an object.
• Kinetic energy increases as speed increases.
• All moving objects have the same kinetic energy.

4. Where is the potential energy of the roller coaster the lowest?

• A
• B
• C
• D

5. Which point on the roller coaster's path represents the maximum potential energy?

• A
• B
• C
• D

6. Which point on the roller coaster's path represents the maximum kinetic energy?

• A
• B
• C
• D

7. In the figure, potential energy is being converted into kinetic energy from:

• Energy is not being converted.
• point B to point C
• The only energy involved here is kinetic.
• point A to point B

8. What are the two types of Potential Energy? **CHOOSE TWO**

• Elastic
• Kinetic
• Gravitational
• Conservational

9. What type of Potential Energy depends upon an objects height above a reference point?

• Elastic
• Gravitational