Unit 1 Review

Front

What is the law of conservation of mass?

Back

In a chemical reaction, the total mass of the reactants equals the total mass of the products.

Front

What does accuracy refer to in measurements?

Back

Accuracy is the closeness of a measurement to its true value.

Front

What is a physical change?

Back

A physical change is a change that does not alter the chemical composition of a substance.

Front

What is a chemical change?

Back

A chemical change involves a change in the chemical properties of a substance, resulting in the formation of new substances.

Front

What is an example of a physical change?

Back

Melting ice is an example of a physical change.

Front

What is an example of a chemical change?

Back

The spoiling of cheese is an example of a chemical change.

Front

What is precision in measurements?

Back

Precision refers to the reproducibility of measurements, or how close multiple measurements are to each other.

Front

What is the difference between accuracy and precision?

Back

Accuracy refers to how close a measurement is to the true value, while precision refers to how consistent multiple measurements are.

Front

What is a solid?

Back

A solid is a state of matter characterized by a definite shape and volume.

Front

What must occur for a process to be classified as a chemical reaction?

Back

There must be a change in chemical properties.