Science Midterms

Which of the following is a sign of a physical reaction?

• Change in color

• Change in state

• Formation of a gas

• Production of heat

Tags

NGSS.MS-PS1-4

What is a common sign of a chemical reaction?

• Melting of ice

• Boiling of water

• Rusting of iron

• Dissolving sugar in water

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which stage of the water cycle involves water vapor cooling and changing into liquid droplets?

• Evaporation

• Condensation

• Precipitation

• Collection

Tags

NGSS.MS-ESS2-4

Identify the type of chemical change when a piece of paper burns.

• Physical change

• Chemical change

• Reversible change

• Temporary change

Tags

NGSS.MS-PS1-2

Which property of water allows it to dissolve many substances?

• High density

• Polarity

• Low boiling point

• High viscosity

Explain why the melting of ice is considered a physical reaction.

• It involves a change in temperature.

• It results in a new substance.

• It is a reversible process.

• It produces light.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Describe a scenario where a chemical reaction is taking place.

• Water freezing into ice

• Salt dissolving in water

• Baking a cake

• Cutting a piece of paper

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

How does evaporation contribute to the water cycle?

• It turns liquid water into vapor, adding moisture to the air.

• It cools the atmosphere by releasing heat.

• It forms clouds by condensing water vapor.

• It causes rain to fall from clouds.

Tags

NGSS.MS-ESS2-4

What type of chemical change occurs when vinegar reacts with baking soda?

• Endothermic reaction

• Exothermic reaction

• Acid-base reaction

• Oxidation reaction

Why is water considered a universal solvent?

• It has a high boiling point.

• It can dissolve a wide range of substances.

• It is found in all three states of matter.

• It has a neutral pH.