Which part of the investigation is changed or manipulated by the scientist.

Which part of the investigation is kept the same and doesn't change throughout the experiment?

Which part of the investigation is measured and results are recorded?

Which part of the investigation is a comparison to the independent variable?

Which hypothesis is written correctly?

Choose the IV: One egg was placed in water without salt, one was placed in water with 2 tbsp of salt, and one was placed in water with 4 tbsp of salt. Make observations to see if the egg floats or not.

Choose the DV: Eggs were placed in containers with and without salt to determine how high they would float. What's the DV?

Find the IV: If we increase the temperature of water, then the tablet will dissolve faster.

What's the DV: Does the height of a ramp affect the speed of a toy car?

Which describes quantitative observation?

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