Grade 4 TCI Science - Unit 2 Lesson 2 Review

Collide means to touch something while moving. A moving object hitting another object is called a collision.

• True

• False

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​When two objects of the same weight traveling at different speeds collide head on, they bounce backward. They each travel at the original speed of the other object.

• True

• False

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To touch something while moving.

• collide

• transfer

• energy

• conserve

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Having the same total amount before and after a change happens.

• collide

• conserve

• transfer

• energy

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motion

• energy

• movement

• transfer

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The ability to make an object move or to cause a change.

• reflect

• collide

• transfer

• energy

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Energy transferred as heat can produce light.

• True

• False

Scientists cannot predict what would happen when objects collide if

• light were not conserved.

• energy were not conserved.

• speed affected the amount of energy.

• weight affected the amount of energy.

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Some of the energy transferred during a collision can produce ________.

• heat

• light

• sound

• all of the above

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When two objects of the same weight traveling at different speeds collide head on, both objects

• stop moving.

• bounce backwards and change speeds

• change direction and move at their original speed

• bounce backward and travel at their original speed.

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