Module Pretest: Matter: Properties and Changes

Shape is a chemical property.

• True

• False

Density is an example of a _____

• chemical change

• chemical property

• physical change

• physical property

The ability of a match to burn is an example of a chemical change.

• True

• False

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Chemical reactions _______.

• absorb more energy than they release

• can either release more energy than they absorb or absorb more energy than they release, depending on the reaction

• release and absorb exactly the same amount of energy

• release more energy than they absorb

Tags

NGSS.MS-PS3-4

A solid, yellow substance formed when Mr. Simon poured two colorless liquids together at room temperature. Which statement best explains why this demonstrates a chemical reaction?

• The color of the liquids changed to yellow.

• One of the liquids dissolved in the other liquid.

• One of the liquids changed from a liquid to a solid.

• The yellow substance is a solid at room temperature.

Tags

NGSS.MS-PS1-2

A chemical reaction between two molecules of hydrogen gas (H₂) and one molecule of oxygen gas (O₂) forms two molecules of water (H₂O). Caitlin makes a model to represent this reaction. In her model, gray circles represent hydrogen atoms and white circles represent oxygen atoms, as shown. Caitlin’s model has an error. What can Caitlin do to correct her model?

• Erase a hydrogen atom from the reactant molecule that has two hydrogen atoms.

• Add another hydrogen atom to the product molecule that has one hydrogen atom.

• Change the reactants to three molecules of one hydrogen atom and one oxygen atom.

• Change the product to one molecule of four hydrogen atoms and two oxygen atoms.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

A kerosene lantern is a lighting device. It uses a petroleum product called kerosene as fuel. The kerosene is held in the base of the lantern, and a cloth wick soaks up the kerosene. Air can flow into the lantern through holes in the device. The diagram shows a kerosene lantern. When the wick is lit, the kerosene in the wick undergoes a chemical reaction with oxygen in the air to release energy in the form of light. Which of the following would increase the amount of time the lantern would stay lit?

• Increase the size of the base to hold more kerosene.

• Change the shape of the flame to give off more light.

• Increase the size of the air holes to allow more air flow.

• Change the material of the wick to soak up more kerosene.

Tags

NGSS.MS-ETS1-1