Chemical Reactions Quiz

Which of these shows a chemical reaction?

• Mixing vinegar and baking soda to create bubbles.

• Melting ice to form water.

• Breaking a glass into smaller pieces.

• Dissolving sugar in water.

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

A student mixes two liquids, and bubbles appear. What does this show?

• A new solid formed.

• A chemical reaction happened.

• The liquids stayed the same.

• The volume of the liquids increased.

Tags

NGSS.MS-PS1-2

Which one is a chemical change?

• Tearing paper into smaller pieces.

• Burning a piece of paper.

• Freezing water into ice.

• Mixing oil and water.

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

What happens to mass during a chemical reaction?

• It increases.

• It decreases.

• It stays the same.

• It disappears.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A clear liquid and a yellow liquid are mixed. The solution turns green, and bubbles form. What does this show?

• A physical change happened.

• A chemical reaction happened.

• The liquids combined but did not react.

• The reaction cooled down the liquids.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A student heats a piece of metal until it glows red and then cools it down. Is this a chemical reaction?

• Yes, because the metal changed color.

• No, because the metal did not change chemically.

Tags

NGSS.MS-PS1-2

You mix a white powder with water, and the solution gets cold. What kind of reaction is this?

• Exothermic, because heat is released.

• Endothermic, because heat is absorbed.

• Physical change, because no new substance forms.

• Combustion, because the powder reacts with water.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

When wood burns, ash, heat, and gases form. Is this an example of the conservation of mass?

• Yes, because the mass of the ash equals the mass of the wood.

• No, because some of the mass disappears as smoke.

• Yes, because the total mass of the products equals the reactants.

• No, because gases do not have mass.

Tags

NGSS.MS-PS1-5

What happens when a solid dissolves in water?

• The molecules of the solid break apart but stay the same substance.

• The molecules of the solid form a new substance with the water.

• The solid disappears completely and loses its properties.

• The water changes into a different substance.

Tags

NGSS.MS-PS1-2

A scientist mixes two liquids, and the total mass before and after the reaction is the same. What does this show about the reaction?

• Mass is not conserved because the liquids combined.

• Mass is conserved because the products have the same mass as the reactants.

• The reaction did not happen because the mass stayed the same.

• The mass changed into energy during the reaction.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5