If an element is malleable, this means that it can (Level 1 Recall). Mark only one oval.

• be formed into long thin shapes like wires.

• be formed into thin sheets without breaking.

• be used to conduct electric current.

• be used as an electric insulator.

A different chemical substance is formed when a

• candle burns

• cup breaks

• piece of cloth is cut

• piece of chalk breaks

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A student adds 5 grams of vinegar to 7 grams of baking soda in a sealed container. Then he watches the chemical reaction that occurs. Which of these predicts the mass of the materials in the container after the reaction is complete according to the law of conservation of matter (mass)?

• 12 grams

• 35 grams

• 2 grams

• 0 grams

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The diagrams below show possible combinations of oxygen and hydrogen. Which diagram represents a mixture? Check all that apply.

• A

• B

• C

• D

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

Which statement refers to a physical property of a substance? Mark only one oval.

• the density of copper is 8.93g/cm^3

• carbon combines with oxygen to form carbon dioxide

• acids are corrosive

• zinc metal reacts with an acid to produce hydrogen gas

The diagrams represent the movement and distribution of particles in different states of matter. Which statement about the diagrams is true?

• A) A is the solid, B is the liquid, and C is the gas

• B) A is the liquid, B is the solid, and C is the gas

• C) A is the solid, B is the gas, and C is the liquid

• D) A is the liquid, B is the gas, and C is the solid.

Tags

NGSS.MS-PS1-4

Which statement about the molecules in ice and the molecules in liquid water is correct?

• The molecules in ice have more energy than the molecules in liquid water.

• The molecules in ice have more electric charge than the molecules in liquid water.

• The molecules in ice are less free to move than the molecules in liquid.

• The molecules in ice contain different atoms than the molecules in liquid water.

Tags

NGSS.MS-PS1-4

What kind of changes in substances are always physical changes?

• changes of state from a solid to liquid to gas and back (phase changes)

• changes that change the identity of the substance

• changes the result in new substances being formed

• changes that change the density of the substances

Tags

NGSS.MS-PS1-4

What makes chemical properties so difficult to observe?

• These properties cannot be observed with your five senses until after the change has occurred.

• They result in changes of state.

• They happen too quickly.

• Wearing protective glasses is required.

Tags

NGSS.MS-PS1-2

As a substance changes from a liquid to a gas, the distance between its molecules

• remains the same

• increases

• increases, then decreases

• decreases

Tags

NGSS.MS-PS1-4