Physical and Chemical Properties/Changes

Which characteristic of a substance is considered a chemical property?

• its boiling point

• its reactivity

• its density

• its conductivity

A scientist is examining an unknown solid. Which procedure would most likely help determine a chemical property of the substance?

• heating it to find the temperature at which it melts

• exposing it to a flame to see if it catches on fire

• hitting it with a hammer to determine if it breaks or bends

• placing it in water to find out whether or not it dissolves

Which event always involves a chemical change?

• boiling

• melting

• conducting

• burning

Which statement describes all chemical changes, but not all physical changes?

• Bubbles are produced.

• A new substance forms.

• Phase changes occur.

• A color change occurs.

Which is an example of a chemical change?

• frying an egg

• boiling water

• melting butter

• chopping onions

Which laboratory activities involve chemical changes?

• leaving a copper penny in vinegar until it turns green

• boiling saltwater for several minutes until only solid salt remains

• extracting iron filings from a sand mixture using a magnet

• crushing a rock with a hammer to extract mineral deposits

any characteristic of matter that you can observe without changing the identity of the substances that make it up

• physical property

• chemical property

• periodic table

• conglomerate

the amount of matter in an object

• mass

• weight

• volume

• density

the amount of space a sample of matter occupies

• mass

• weight

• volume

• density

the mass per unit volume of a substance

• mass

• weight

• volume

• density