Chemistry grade 8

What is a pure substance that cannot be broken down into any other substance by physical or chemical means. Ex: Gold, Silver, Oxygen, & Nitrogen

• element
• compound
• mixture
• salad

What is a  pure substance made of two or more elements chemically combined in a set ratio. Ex: CO2 has a set ratio of 1:2, meaning for every one carbon atom there are two oxygen atoms.

• element
• compound
• mixture
• salad

Tags

NGSS.MS-PS1-1

What is an atom which has gained or last electrons called?

• isotope
• atom
• ion
• balanced

What type of property can only be observed by changing the substance into a new substance. Ex: Flammability, oxidation

• chemical
• physical

Tags

NGSS.MS-PS1-2

What type of mixture contains visible parts (like a salad or a pizza or granite)

• homogenous
• heterogenous

What is matter

• Anything which is solid
• Anything that takes up space and has mass
• when something is wrong

Gold is an example of a(n) 

• pure element
• pure compound
• pure mixture

Air is an example of a(n)

• element
• compound
• heterogenous mixture
• homogenous mixture

Phase changes (going from a solid to a liquid to a gas) are what types of changes?

• chemical
• physical

Tags

NGSS.MS-PS1-4

Elements in a compound can be separated __________

• physically
• chemically

Tags

NGSS.MS-PS1-2