8th Grade Unit 1

Combinations of 2 or more substances (elements and compounds) that are physically blended together. 

• Compound
• Mixture
• Element
• Substance

Which of the following are elements?

• He 

• O₂ 

• S₈

• Fe₂O₃

• O₃

Tags

elements, compounds, matter

Which of the following is a compound?

(circles of different colors represent different types of atoms)

(circles that are touching are chemically bonded)

• 
• 
• 

Tags

NGSS.MS-PS1-1

Which of the following is a mixture?

(circles of different colors represent different types of atoms)

(circles that are touching are chemically bonded)

• 
• 
• 

Tags

NGSS.MS-PS1-1

Salt is a _________. 

• compound 
• element 
• mixture 

A compound is made of ________ atoms.

• big

• similar

• different

Tags

NGSS.MS-PS1-1

A substance that contains only one type of atom is a(n)

• compound

• element

• heterogeneous mixture

• homogeneous mixture

All matter is made of .....

• energy 
• atoms 
• air
• chemistry

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

What is the definition of a compound?

• The smallest part of any substance which can exist on its own

• Two or more atoms chemically joined together (can be the same or can be different)

• A simple substance in which all the atoms are identical

• Two or more different elements chemically joined together

Is salt (NaCI) a compound or an element?

• Compound

• element

Tags

NGSS.MS-PS1-1