Science 7 Lesson 1&2

Which is most likey to be a mixture?

• solution formed when one substance dissolves in another
• substance formed when one atom combines with an atom of another element
• substance formed when one atom combines with another atom of the same element

Which is an example of a mixture?

• Fruit Punch
• Sodium chloride
• Water

Which substance is a compound?

• Salt Water
• Hydrogen
• Salt
• Orange Juice

Sodium (Na) and chlorine (Cl) combine to form table salt (NaCl). How many sodium (Na) atoms are there for every chlorine atom (Cl)?

• two sodium (Na) atoms for every one chlorine (Cl) atom
• 
  one sodium (Na) atom for every one chlorine (Cl) atom
• 
  one sodium (Na) atom for every two chlorine (Cl) atoms

Sodium chloride (NaCl) is formed in a chemical reaction between sodium (Na) and chlorine (). What is sodium chloride?

• element
• mixture
• compound

Tags

NGSS.MS-PS1-1

When potassium and bromine atoms form chemical bonds, which of these is produced?

• element
• mixture
• compound

Is pure water an element, compound or a mixture? 

• Element
• Compound
• MIxture

Tags

NGSS.MS-PS1-1

A substance that can be separated only by chemical change is a/an:

• element
• compound
• mixture
• solution

Tags

NGSS.MS-PS1-2

A substance that cannot be separated by any means is a/an

• element
• compound
• mixture
• solution

Pure oxygen (O) is an example of...

• an element
• a mixture
• a compound