Foundations of Chemistry

Reactivity with UV light

• Chemical
• Physical

Tags

NGSS.MS-PS1-2

Density

• Chemical
• Physical

One cup of water is left outside for two days when it was checked there was only half a cup left. What happened?

• evaporation; chemical change
• condensation; physical change 
• evaporation; physical change
• condensation; chemical change

Tags

NGSS.MS-ESS2-4

NGSS.MS-PS1-4

melting is a chemical change

• true 
• false

what happens when water freezes?

• ice is formed; chemical property
• cold water is formed; physical change
• ice is formed; physical change
• cold water is formed; chemical change

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Being able to burn is a

• Chemical change
• Chemical property
• Physical change
• Physical property

Tags

NGSS.MS-PS1-2

Putting food coloring into water is a

• Chemical change
• Chemical property
• Physical change
• Physical property

Baking soda and vinegar combining and giving off bubbles of gas is a

• Chemical change
• Chemical property
• Physical change
• Physical property

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Malleability and ductility are

• Chemical changes
• Chemical properties
• Physical changes
• Physical properties

During science lab, some students added small pieces of magnesium (Mg) to hydrochloric acid (HCl). They noticed that bubbles formed, the test tube got hot, and the magnesium disappeared.
Which of the following is a sign that a chemical reaction has taken place in thisexperiment?

• odor
• formation of a gas
• a decrease in temperature
• formation of a precipitate

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5