Midterm Review

What is the difference between a pure substance and a mixture? Select all that apply.

• substances are made of many different things while mixtures are just made of 1

• a substance has one type of particle while a mixture has 2 or more types

• a mixture is physically combined and can be physically separated while a substance is chemically bonded

• a mixture is chemically bonded together while a substance is physically combined

What pure substance is made of 2 or more types of atoms?

• compound

• element

Identify the following

• compound

• homogeneous mixture

• element

• heterogeneous mixture

Tags

NGSS.MS-PS1-1

Identify the following

• compound

• homogeneous mixture

• element

• heterogeneous mixture

What type of mixture is this?

• homogenous mixture
• chemical
• heterogeneous mixture 
• solid mix

Which of the following is an element?

• Sugar
• Salt
• Water
• Oxygen

Which one of these pictures represents a pure substance? 

• 1 and 2
• 1 and 3
• 2 and 3
• 1, 2 and 3

Tags

NGSS.HS-PS1-3

Which of the following would you use to separate sand from iron?

• a bar magnet
• paper
• hot plate

If you change a substance into a new substance...

• Partial Change
• Physical Change
• Chemical Change
• Freezing

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which state of matter has molecules that move fastest and spread to fill the space they are in?  They do not form any pattern.

• solid 
• liquid 
• gas