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observed


[uhb-ZUHRVD]

When you observe something, you watch it carefully.

  observed

problem


[PROB-luhm]

A problem is a difficult situation that you have to figure out or solve.

problem

cradle


[KRAY-dul]

To hold someone or something in your arms like a baby.

  cradle

prediction


[prih-DIKT-shun]

When you make a prediction, you make a guess about what you think will happen in the future. Weather scientists, called meteorologists, predict what the weather will be.

  prediction

tested


[TEST-id]

When you test your idea, you try it out to see if it works.

  tested
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