Science on the main stage Review/Preview

Which statement best describes how Makayla knows there was a chemical reaction?

• Makayla knows a chemical reaction has taken place because the sodium changed state.

• Makayla knows a chemical reaction has taken place because the sodium dissolved.

• Makayla knows a chemical reaction has taken place because the sodium fizzed and created a gas

• Makayla knows a chemical reaction has taken place because the sodium disappeared.

Tags

NGSS.MS-PS1-2

Which model correctly shows that matter is conserved in the reaction?

• Reaction A

• Reaction B

• Reaction C

• Reaction D

Tags

NGSS.MS-PS1-5

Matias wondered why the froth’s properties were different from the baking soda and vinegar.

Which explanation would you give him?

• The atoms in baking soda and the atoms in vinegar have rearranged to form the molecules that make up froth.

• The atoms in baking soda and the atoms in vinegar have mixed to form the molecules that make up froth.

• The atoms in baking soda and the atoms in vinegar have dissolved to form the molecules that make up froth.

• The atoms in baking soda and the atoms in vinegar have evaporated to form the molecules that make up froth.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

When water forms ice on a road as it gets cold, what type of change is this?

• Physical change

• Chemical change

• Both physical and chemical change

• No change occurs

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

What type of change occurs when chocolate melts as it is heated?

• Physical change

• Chemical change

• Both physical and chemical change

• No change occurs

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Burning paper is an example of a ___________change in matter.

• physical

• chemical

• Both physical and Chemical

• No Change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

CO2 bubbles form when you add warm water and sugar to yeast. What type of change is this?

• Physical change

• Chemical change

• Both physical and chemical change

• No change occurs

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Is milk going sour a physical or chemical change?

• Physical 
• Chemical
• Both physical and chemical

• No change

Tags

NGSS.MS-PS1-2

When water in a saucepan bubbles as it is heated, what type of change is happening?

• Physical change

• Chemical change

• Both physical and chemical change

• No change occurs

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Explain why melting chocolate is considered a physical change and not a chemical change.

• Because the chocolate changes its state but not its chemical composition.

• Because the chocolate forms a new substance.

• Because the chocolate reacts with air.

• Because the chocolate burns.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4