Review: Properties and Changes

Which of the following is a chemical property of a substance?

• reacts with silver nitrate

• dissolves in water

• solid at room temperature

• density of 7.8 g/ml

Which of the following is a physical property of a substance?

• not flammable

• reacts with magnesium

• boiling point is 100 degrees Celsius

• pH is 7.0

The properties of NaCl (sodium chloride or salt) are listed below. Select all that are physical properties.

• It is soluble in water.

• It is a white solid.

• The density is 2.16 g/cm3.

• The pH is 7.

The properties of water are listed below. Select all that are chemical properties.

• It is a solid at -4 degrees celsius.

• It has a density of 1.0 g/ml.

• It is highly reactive with magnesium.

• The pH is 7.

Match the substance to it's correct match.

• element

• carbon (C)

• mixture

• glucose (C6H12O6)

• compound

• air

Tags

NGSS.MS-PS1-1

NGSS.MS-LS2-3

Match the substance to it's correct match.

• compound

• iron (Fe)

• element

• trail mix

• mixture

• water (H2O)

Tags

NGSS.MS-PS1-1

Which of the following is evidence of a chemical change?

• a flash of light when two substances are mixed

• folding a paper airplane

• water turning into ice in a freezer

• iron filings sticking to a magnet

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A student mixed Copper (II) chloride (blue liquid) with ammonia (clear liquid). Select two observations that suggest a chemical change occurred.

• a color change to deep bluish purple

• the blue liquid floating on top of the clear liquid

• a flaky precipitate forming

Tags

NGSS.MS-PS1-2

Select all of the following that are physical changes.

• folding a paper airplane

• a magnet sticking to a fridge

• water evaporating from a puddle

• water vapor condensing on the side of a cold glass

• sugar dissolving

What is another word for pH?

• reactivity

• acidity

• flammability

• toxicity