Science CBA Review

Mechanical energy is...

• Energy produced by a machine or moving part

• Energy produced from vibration that you can hear

• Energy that can be seen by the eye

• Energy that causes a change in temperature between materials

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In the tug of war image, if both teams are pulling with the same amount of force, what will happen?

• The green team will win because the force on the rope is unbalanced.

• The blue team will win because the force on the rope is unbalanced.

• Both teams will not move because the force between the two teams is balanced.

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What form of energy does a campfire give off?

• sound and thermal

• light and thermal

• mechanical and light

• thermal and mechanical

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What pulls raindrops down to Earth?

• the clouds

• the force of gravity

• the rain

• the ground

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How does this young boy cause the swing to move back and forth?

• By spinning the swing.

• By pushing or pulling on the swing.

• By lifting the swing in the air.

• By sitting in the swing.

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What form of energy is this?

• Electrical

• Mechanical

• Chemical

• Thermal

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All of these objects are moving in the direction of the pull of gravity EXCEPT-

• a roller coaster going down a steep hill.

• a helium balloon rising into the sky.

• rain and sleet falling from a cloud.

• a rock sinking in a tank of water.

Lack of rainfall caused a river to dry up. This river is where salmon lay their eggs. All of the following are likely results of this environmental change EXCEPT - 

•  

  the salmon population will decrease

• predators that feed on salmon will hunt elsewhere

• there will be more plants that live in water

• other animals that live in the river will leave

Answer explanation

Remember that plants need water too; not just animals

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Flooding in an area will have the most harmful effect on which group of organisms?

• Flying insects that eat leaves

• Fish that live in fresh water

• Plants that live at the bottom of a lake

• Birds that nest on the ground

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Some plants grow best in damp environments.  During a severe drought, these plants will most likely —

• perish (die)

• move

• grow

• thrive (live)

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