Chapter Collisions

What makes things happen?

• matter
• computers
• energy
• density

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Which of these is NOT<i> </i>true about energy?

• it moves wind turbines
• it knocks down bowling pins
• it makes a baseball fly
• you can hold it in your hand

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In science, when one object runs into another we call it a _____________.

• crash
• hit
• strike
• collision

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What happens when Dr. Jeff's mom collides with Izzy?

• nothing
• Dr. Jeff's mom flies back
• Izzy flies back
• they both fly back

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To make a fair test or experiment you should change __________ variable(s) at a time.

• one
• two
• three
• four

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What is transferred at the instant the bat hits the ball?

• matter
• energy
• sound
• light

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As an object moves faster, it has more of what to transfer?

• weight
• density
• energy
• matter

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If you increase the weight of a moving object, the amount of energy it can transfer does what?

• increases
• decreases
• stays the same
• none of these

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What do we call the section of a car that absorbs energy in a collision?

• windshield
• bumper
• hood
• crumple zone

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When a hockey puck hits a plexiglass barrier some of the energy is converted into what?

• sound and heat
• sound and matter
• matter and heat
• sound only

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