Chemical Properties

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

Tags

NGSS.MS-PS1-2

Which uses of iron are due to its chemical properties? Select two options.

• producing colored sparks in fireworks

• changing from liquid to gas at 2,862°C

• rusting in the presence of water and oxygen

• hanging from solid to liquid if heated to 1,538°C

• conducting electricity and heat

Tags

NGSS.MS-PS1-2

Which statement best describes what happens during a chemical change?

• Both the identity and the properties of a substance change.

• Some properties of a substance change, but its identity remains the same.

• The chemical properties of a substance change, but its physical properties remain the same.

• The physical properties of a substance change, but its chemical properties remain the same.

Tags

NGSS.MS-PS1-2

Which event always involves a chemical change?

• boiling

• melting

• conducting

• burning

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Making a pancake from batter is an example of a ___________ change.

• chemical

• physical

Tags

NGSS.MS-PS1-2

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.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which is an example of a chemical change?

• frying an egg

• boiling water

• melting butter

• chopping onions

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

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

Tags

NGSS.MS-PS1-2

Jenna took an open bowl of leftover mashed potatoes from the refrigerator. She determined that chemical changes occurred since the potatoes were first placed there.

Which observations most likely led to Jenna’s conclusion?

• a production of odor

• a decrease in temperature

• a change in moisture content

• a decrease in mass

Tags

NGSS.MS-PS1-2