Chemical Magic*

Which of the following represents a chemical change?

• matter changes phase

• matter changes its shape and volume

• matter keeps its identity and properties

• matter changes into another kind of matter with different properties

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following would be the best to use to make a dull penny shiny again?

• wash it in salt water

• wash it in soapy water

• wash it in a vinegar/salt mixture

During a chemical reaction, which of the following happens?

• matter is neither created or destroyed

• matter is not changed

• matter is destroyed

• matter is created and destroyed

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following are physical properties of metals

• shiny

• bendable

• conducts heat

If an object has a greater volume than another object it will

• take up more space

• weigh more

How many different elements are in a molecule of H₂ O

• 1

• 4

• 3

• 2

Tags

NGSS.MS-PS1-1

When materials cool, they tend to get smaller. Why?

• some particles are destroyed

• particles have less space between them

• particles are turned into a different material

• particles have more space between them

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

True or False? Explosions are always dangerous.

• True

• False

True or False? Explosions are always used to destroy things.

• True

• False

True or False? Explosions are caused when gas is produced.

• True

• False