Big Idea 8 and 9 Flashcard

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. Examples include melting ice or breaking a glass.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. Examples include burning wood or rusting metal.

Front

What is the best method to separate a mixture of salt and iron filings?

Back

Using a magnet to pull the iron filings from the salt.

Front

What is an example of a chemical change?

Back

Burning wood is an example of a chemical change.

Front

What is not an example of a chemical change?

Back

Evaporating water is not a chemical change; it is a physical change.

Front

What factors can slow down the decomposition process in a compost pile?

Back

Lowering the surrounding temperature can slow down the decomposition process.

Front

What evidence indicates a chemical change has occurred when toasting bread?

Back

The toast changing color indicates a chemical change due to the increase in temperature.

Front

What property can be used to separate different types of coins?

Back

Size can be used to separate different types of coins.

Front

What is the role of bacteria in a compost pile?

Back

Bacteria help break down plant material in a compost pile, facilitating chemical changes that turn it into smaller particles.

Front

What happens to the temperature during a chemical change?

Back

The temperature can increase or decrease during a chemical change, often indicating that a reaction is occurring.