The greenhouse effect is needed for Earth to stay warm enough for human life.

What 2 words always need to be in a hypothesis?

The part of the experiment with instructions that tells you what to do.

Which of the following is a quantitative observation?

The Earth's atmosphere acts like the walls of a greenhouse trapping in the heat. 

The temperatures in the  atmosphere have ________________ in the past few decades.

Which of the following is considered a greenhouse gas?

What is the IV (independent variable) in the following? If a planet has an atmosphere, then it will trap gases.

The part of the experiment that stays the same is called the

The first sentence of a conclusion should tell

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