PS Unit 1 Review

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

• change in shape
• melting
• formation of a gas
• dissolving

Tags

NGSS.MS-PS1-2

Which of the following is NOT an example of a physical change?

• crumpled paper
• pencil sharpening
• shrunken clothing
• rust

Freezing Juice?

• Physical Change
• Chemical Change

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

A change where one or more new substances are created.

• Physical Change 
• Chemical Change 

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A copper penny turning greenish after a few years is an example of ...

• Chemical Change
• Physical Change

Tags

NGSS.MS-PS1-2

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

Example of a physical property

• magnetism
• reactivity with oxygen
• flammability
• non-reactive

Tags

NGSS.MS-PS2-3

Example for physical property

• melting point
• flammability
• reactivity 
• combustion

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What type of mixture is this?

• homogenous mixture
• chemical
• heterogeneous mixture 
• solid mix

A substance with two or more elements that are combined in a fixed proportion

• colloid
• compound
• element
• solution

Tags

NGSS.MS-PS1-1