PS Unit 3 Review

Front

What is the independent variable in an experiment?

Back

The independent variable is what the scientist changes in an experiment.

Front

Which type of reaction absorbs energy and makes the surroundings colder?

Back

An endothermic reaction absorbs energy from its surroundings.

Front

What reaction type occurs when energy is absorbed?

Back

An endothermic reaction occurs when energy is absorbed.

Front

What is the name for the substance being dissolved in a solution?

Back

The substance being dissolved in a solution is called the solute.

Front

If an object floats in water, what can be said about its density?

Back

If an object floats in water, its density is less than 1 g/mL.

Front

What is the dependent variable in an experiment?

Back

The dependent variable is what the scientist measures in an experiment.

Front

What is an exothermic reaction?

Back

An exothermic reaction releases energy to its surroundings.

Front

What is a solvent?

Back

A solvent is the substance that dissolves the solute in a solution.

Front

What is the principle of buoyancy?

Back

The principle of buoyancy states that an object will float if it is less dense than the fluid it is in.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.