Exploring Matter and Chemical Reactions

What type of property is color?

• Chemical

• Physical

• both

• neither

Which of the following best describes the atomic composition of a water molecule?

• Two hydrogen atoms and one oxygen atom

• One hydrogen atom and two oxygen atoms

• Two oxygen atoms and one nitrogen atom

• One hydrogen atom and one oxygen atom

Tags

NGSS.MS-PS1-1

What happens to the particles of a substance when thermal energy (heat) is added?

• The particles move slower and come closer together

• The particles move faster and spread apart

• The particles stop moving

• The particles change into a different element

Tags

NGSS.MS-PS1-4

Which of the following is a sign that a chemical reaction has occurred?

• A change in state from solid to liquid

• A change in color

• A change in shape

• A change in size

Tags

NGSS.MS-PS1-2

How does the total number of atoms change in a chemical reaction?

• The total number of atoms increases

• The total number of atoms decreases

• The total number of atoms remains the same

• The total number of atoms doubles

Tags

NGSS.MS-PS1-5

Predict what happens to the state of water when thermal energy is removed.

• It changes from liquid to gas

• It changes from gas to liquid

• It changes from liquid to solid

• It changes from solid to gas

Tags

NGSS.MS-PS1-4

Analyze the following scenario: A piece of iron rusts over time. What type of change is this?

• Physical change

• Chemical change

• State change

• No change

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

What type of property is luster?

(luster: how shiny an object is)

• physical

• chemical

• Both

• Neither

Which of the following models best represents the conservation of mass in a chemical reaction?

• The mass of reactants is greater than the mass of products

• The mass of reactants is less than the mass of products

• The mass of reactants is equal to the mass of products

• The mass of reactants is unrelated to the mass of products

Tags

NGSS.MS-PS1-5

Which of the following processes involves a chemical reaction in the human body?

• Digestion of food

• Breathing

• Sweating

• Walking

Tags

NGSS.MS-PS1-2