Grade 9 Science Exam Review

Which is not an example of a chemical reaction?

• Substance changes colour

• A precipitate is formed

• Substance breaks in half

• Change in temperature

Tags

NGSS.MS-PS1-2

A pure substance is made up of only one particle

• True

• False

Tags

NGSS.MS-PS1-1

"A change in which the composition of a substance remains the same and no new substance has been created"

• Physical change

• Chemical change

• Color change

• Gas production

Tags

NGSS.MS-PS1-4

"An element that has properties of both metals and non-metals"

• Metal

• Non-metal

• Metalloid

• Element

Tags

NGSS.HS-PS1-1

Calculate the density of a metal with a mass of 56 g and a volume of 15 cm^3 (cubed)

• 2.8 g/cm^3

• 9.8 g/cm^3

• 3.7 g/cm^3

• 3.1 g/cm^3

Tags

NGSS.5-PS1-3

What is the outermost orbital shell of an element called?

• Valence shell

• Outer shell

• Chadwick shell

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the law of electric charges?

• Like repel, unlike repel, charged and neutral attract

• Like attract, unlike attract, charged and neutral repel

• Like repel, unlike attract, charged and neutral attract

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

More electrons than protons results in a

• Positive charge

• Negative charge

• Neutral charge

Equal electrons and protons results in

• Positive charge

• Negative charge

• Neutral charge

Earth’s solid outer layer

• Biosphere

• Lithosphere

• Hydrosphere

• Atmosphere