Science Leap Practice

Which of these is a nonliving thing?

• a mushroom

• a tree

• a worm

• a river

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A wetland was drained to build a mall.  Two years later, there were no more toads in that area.  Why did the toads disappear?

• The toads were destroyed by the construction equipment.

• The toads died because toads cannot breathe out of water.

• The toads were all killed by trucks in the area.

• The toads needs could no longer be met.

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When Izzy and Zoe pull on the rope with the same amount of force, the forces are _____.

• increased

• unbalanced

• balanced

• decreased

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Why did Izzy fall when playing tug of war?

• he tripped

• unbalanced forces

• balanced forces

• he was pushed

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A balanced force causes an object to...

• Stay in place

• Accelerate in speed

• Decelerate in speed

• Move in a constant speed

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Magnetism is a type of ____________

• force

• book

• plant

• animal

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When two magnets attract, they ______________

• push apart

• change color

• get colder

• pull together

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When two magnets repel, they ________________

• change color

• pull together

• push apart

• get colder

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Explain why the magnets are 'floating' above each other.

• The magnets are attracting each other as their unlike poles are facing each other.

• The magnets are repelling each other as their like poles are facing each other.

• Nothing happened. The magnets are weak and stayed in their position.

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Flooding is caused by:

• precipitation

• wind

• temperature

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