Unit 5 Review

What kind of properties can only be observed when a substance changes into a different substance?

• physical properties
• chemical properties

Tags

NGSS.MS-PS1-2

Properties that can be observed without changing the identity of the substance.

• Physical
• Chemical

Example for physical property

• odor
• burns in air
• reacts with water to create hydrogen gas
• rust

Example for chemical property

• color
• hardness
• toxicity
• solubility

Tags

NGSS.MS-PS1-2

What is a chemical property?

• A property that describes the state of a system

• A property observed during a reaction

Tags

NGSS.MS-PS1-2

In an exothermic reaction, heat is ...

• taken in
• given out

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

In an endothermic reaction, heat is ...

• taken in

• given out

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

During an endothermic reaction in a beaker if we are part of the surroundings and touched the beaker, it would feel _______. 

• Warm
• Cold

Tags

NGSS.MS-PS1-4

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

• Endothermic processes
• Exothermic processess
• None of these 

Tags

NGSS.MS-PS1-4

_____ reactions usually feel hot!

• endothermic

• exothermic