6th Grade Chemistry Test Review

Which of the following substances is an element?

• CO₂

• NaCl

• H₂

• HCl

Which of the following describes a metal?

• malleable, ductile, dull, insulator

• malleable, luster, ductile, conductor

• gas, dull, brittle, insulator

• luster and insulator

Which of these could describe a metalloid?

• luster and insulator

• dull, brittle, insulator

• luster, malleable, ductile

• shiny, conductor, ductile

Two substances are mixed together. One dissolves in another and the temperature decreases. Which statement is true?

• A chemical change occurred because one substance dissolved.

• A physical change occurred because the temperature decreased.

• A chemical change occurred because the temperature changed.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Rocks separate when soil is sifted.

• Physical change

• chemical change

Water boiling on the stove.

• physical change

• chemical change

Tags

NGSS.MS-PS1-4

Which is true?

• Electrons are negative and have a mass of 1 amu.

• Electrons are negative and have virtually no mass.

• Neutrons are negative and have a mass of 1 amu.

Which 2 subatomic particles have mass?

• protons and electrons

• neutrons and electrons

• neutrons and protons

Which letter represents electrons?

• w

• x

• y

• z

Tags

NGSS.MS-PS1-1

How many atoms in NaHClO₃?

• 4

• 5

• 6

• 3

Tags

NGSS.MS-PS1-1