8th Grade Chemistry Review

Anything that has mass and takes up space

• quark

• matter

• mixture

• solute

mixture in which the individual substances are evenly mixed

• heterogeneous

• homogeneous

• element

• pure substance

An element consists of just one type of

• atom

• mixture

• compound

• helium

Tags

NGSS.MS-PS1-1

The number of protons can be found by reading what from the Periodic Table?

• atomic mass

• mass number

• energy level

• atomic number

A compound is

• 2 or more atoms of different elements chemically combined

• 2 or more atoms chemically combined

• a mixture

• hydrogen

Tags

NGSS.MS-PS1-1

Carbon dioxide and sodium chloride are examples of

• elements

• homogeneous mixtures

• compounds

• heterogeneous mixtures

Tags

NGSS.MS-PS1-1

Which of the following is a physical change

• burning wood

• cutting paper

• photosynthesis

• apple browning

If 4g of salt is dissolved in 200g of water, what would the mass of the solution be?

• 200g

• 204g

• 208g

• 196g

Tags

NGSS.MS-PS1-2

Which of the following is evidence that a chemical change has occurred?

• melting

• boiling

• bubbling/fizzing

• change of size

Tags

NGSS.MS-PS1-2

When trying to identify an unknown element, a scientist determines what other elements the unknown element reacts with chemically.  Which property of the unknown element determines the other elements it reacts with?

• The total number of neutrons in the unknown element
• The total number of particles in the nucleus of the unknown element
• The number of protons in the nucleus of the unknown element
• The number of valence electrons in the unknown element

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2