Physical, Chemical, Endothermic & Exothermic

Which of the following is a sign that a chemical reaction has occurred?

• change in shape
• melting
• bubbles of gas appear
• dissolving

Tags

NGSS.MS-PS1-2

Is hammering wood together to build a house a chemical or physical change?

• chemical
• physical

After you mix two substances together, a new substance forms.  This is an example of:
 

•  Physical Change
•  Chemical Change

Tags

NGSS.MS-PS1-2

Sugar dissolves in water.  This is an example of....

• Physical Change
• Chemical Change

Tags

NGSS.MS-PS1-4

Evaporation is what kind of change?

• Endothermic
• Exothermic

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Condensation and raining are examples of what?

• Exothermic
• Endothermic

Tags

NGSS.MS-ESS2-4

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Baking bread and cooking an egg are examples of....?

• Endothermic processes
• Exothermic processess

Tags

NGSS.MS-PS3-4

If a chemical reaction is EXOTHERMIC, the temperature would....

• Stay the same
• Increase
• Decrease

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

When you freeze water, it turns to ice.  What kind of change is this?

•  Physical
• Chemical

Tags

NGSS.MS-PS1-4

Give 3 reasons to explain how you got your answer for Question # 9.  

• Reason #1:
•  Reason # 2:
• Reason # 3: 

Tags

NGSS.HS-ETS1-1

NGSS.HS-ETS1-3