Chemical Changes Quiz

What is a chemical change?

• A change in the state of matter

• A change where new substances with different properties are formed

• A change in the physical shape or size of a substance

• A reversible change in temperature

Tags

NGSS.MS-PS1-2

Which of the following is an example of a chemical reaction?

• Boiling water

• Dissolving sugar in water

• Rusting of iron

• Melting ice

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the law of conservation of mass in a chemical reaction?

• Mass is not conserved; it can be created or destroyed

• Mass can only be transferred, not converted

• Mass of the reactants equals the mass of the products

• Energy is conserved, not mass

Tags

NGSS.MS-PS1-5

What type of chemical reaction involves the combination of two or more substances to form a new compound?

• Decomposition

• Synthesis

• Single displacement

• Double displacement

Tags

NGSS.MS-PS1-5

In a combustion reaction, what is typically one of the reactants?

• Water

• Oxygen

• Carbon dioxide

• Hydrogen

What is the result of a decomposition reaction?

• Two or more substances combine to form one product

• A single compound breaks down into two or more simpler substances

• Two compounds exchange partners to form two new compounds

• A free element replaces an element in a compound

Which of the following is a sign of a chemical change?

• Change in shape

• Change in size

• Formation of a precipitate

• Change in state

Tags

NGSS.MS-PS1-2

What happens in an exothermic reaction?

• The system absorbs heat from the surroundings

• The system releases heat to the surroundings

• The temperature of the system remains constant

• The reaction stops after absorbing heat

Tags

NGSS.MS-PS1-4

Which equation correctly represents photosynthesis, a chemical reaction?

Tags

NGSS.MS-LS1-6

NGSS.MS-LS1-7

What is required to initiate most chemical reactions?

• Catalyst

• Inhibitor

• Activation energy

• Vacuum

Tags

NGSS.MS-PS3-5