Match It! :

You will now check your understanding of the vocabulary words for this lesson by placing them in sentences. Click "Match It!" below to begin the activity.

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Objects appear to have no weight when they are in zero gravity.

As the spacecraft made its way around Earth, the astronaut felt weightless.

Because gravity is far less present in space, men and women in space require handholds and footholds to help them do work.

On Earth or in space, the push or pull given in response to an initial push or pull is called reaction force.

Scientists use the word counteract to describe what happens when one force cancels out another force.

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