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Students created models of the water cycle using empty plastic bottles. Water was placed in the bottom of each bottle and the top was sealed with a plastic cap. The bottles were then placed in a sunny window in the classroom. What would best represent the precipitation step of the water cycle in this model?

• water drops in the bottle collecting at the top

• water drops in the bottle moving down the sides

• the amount of water decreasing at the bottom of the bottle

• sunlight from the window warming the water at the bottom of the bottle

Tags

NGSS.MS-ESS2-4

Which sequence below shows how water leaves the ocean and returns to land as it moves through the water cycle?

• condensation, precipitation, evaporation

• evaporation, condensation, precipitation

• evaporation, precipitation, condensation

• precipitation, condensation, and precipitation

Tags

NGSS.MS-ESS2-4

Which stage in the water cycle is represented by the arrow showing water vapor rising from the sea?

• collection

• condensation

• evaporation

• precipitation

Tags

NGSS.MS-ESS2-4

Where is most of Earth's water found?

• underground

• in Earth's oceans

• in rivers and lakes

• in polar ice caps

Tags

NGSS.MS-ESS2-4

One morning, Ryan noticed there were tiny drops of water on the grass as he walked to school. That afternoon, he did not see any drops of water on the grass when he returned home. Which of the following best explains what happened to the drops of water?

• The heat from the air caused the water drops to boil.

• The air cooled the water and caused the drops to freeze.

• The Sun heated the water and caused the drops to evaporate.

• The energy from the Sun caused the water drops to condense.

Tags

NGSS.MS-ESS2-4

NGSS.MS-PS1-4

Which step in the water cycle returns water directly to the oceans?

• condensation

• evaporation

• transpiration

• precipitation

Tags

NGSS.MS-ESS2-4

Signs of a chemical change could be:

• a change in energy (temperature, light, sound)

• a precipitate forms (a solid forms from 2 liquids)

• formation of gas (bubbles)

• shocking change in color

• all of these answers are signs of chemical change

Tags

NGSS.MS-PS1-2

What is a chemical reaction?

• a change in matter when the molecules rearrange to make new molecules

• a change in matter when matter changes its form or appearance

• a change in matter when the physical appearance changes

• a very boring change in matter

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

This image shows a

• chemical reaction

• physical change

• musical change

• all of these answers are correct

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The reactants in the image above are:

• CH4 and 2 O2

• 2 H2O and CO2

• All of these are reactants

• All of these are products

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5