6th Grade Mid-Term Review Part 2

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition. Example: Melting ice.

Front

What is a chemical change?

Back

A chemical change is a process where new substances are formed, involving a change in the chemical composition of the original substance. Example: Burning wood.

Front

Which materials are good conductors of heat?

Back

Metals are good conductors of heat due to their ability to transfer energy efficiently.

Front

What is a hypothesis?

Back

A hypothesis is a testable explanation for a problem or question that has not yet been tested.

Front

What is an example of a physical change?

Back

Melting ice is an example of a physical change.

Front

What is NOT an example of a chemical change?

Back

Breaking a pencil is NOT an example of a chemical change; it is a physical change.

Front

What happens during a chemical change?

Back

During a chemical change, the original substances are transformed into new substances with different properties.

Front

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

Back

A physical change does not change the chemical composition of a substance, while a chemical change results in the formation of new substances.

Front

What are some examples of chemical changes?

Back

Examples of chemical changes include rusting iron, cooking an egg, and souring milk.

Front

What is the role of metals in heat conduction?

Back

Metals facilitate heat conduction due to their free-moving electrons, which transfer energy quickly.