Questions

Question 1

How/when do objects have energy of motion or stored energy?

Answer 1

Energy of Motion is transferred from one object to another - bowling ball hitting a pin.

Stored Energy is object can move without touching another object - apple falling from a tree due to gravity pulling in it.

Question 2

Describe what happens when different objects collide under different conditions (weight/speed).

Answer 2

When objects collide energy is transferred from one object (rolling) to the other(still).

• same weight ( two soccer balls): still ball moves at the SAME SPEED as the rolling object
• different weight ( bowling ball an pin): still pin (light) moves at FASTER SPEED than rolling ball (heavy)

Question 3

How does sound start?

Answer 3

Sound starts with vibration.

A soccer ball vibrates when you kick it.

A floor vibrates when you stomp on it.

Drum and guitar vibrate when you play them.

Question 4

What happens when light bounces off of an object?

Answer 4

When light bounces off an object and into your eyes, the object looks a certain way. It can:

1. Reflect…mirror
2. Pass Through…air, glass and water
3. Absorb…black shirt…heats up.

Question 5

What are the three ways in which energy can be transferred without moving objects?

Answer 5

1. Sound…vibration…jumping on floor
2. Light…flashlight heat up paper
3. Heat….