When soil and rocks are washed away by rain and wind

Why is erosion important to study?

• It can make plants grow faster

• It changes the land and can make it hard for plants and animals to live

• It makes the weather warmer

What is erosion?

• When rocks grow bigger

• When plants grow is the soil

• When soil and rocks are washed away by rain and wind

What materials were used in the experiment?

• Sand, water, and rocks

• Plants, sunlight, and air

• Soil, a grassy mound, and water

Why did the experiment use both a mound of soil and grassy mound of soil?

• To see how plants affect erosion

• To see if water is important

• To make the experiment more colorful

What happened when it rained om the mound of soil without grass?

• The soil stayed in place

• The soil washed away easily

• The grass grew quickly

What did you observe about the soil mound during heavy rain?

• The soil eroded a lot

• The soil turned into rocks

• The soil became dry

What happened when it rained on grassy mound?

• The soil washed away easily

• The grass turned brown

• The soil stayed in place with less erosion

How do the roots of plants help prevent erosion?

• By making the soil dry

• By holding the soil together

• By washing away the soil

What did you notice about the water from the soil mound?

• It was clear

• It was dry

• It was muddy

Why is the water form the grassy mound clearer than the water from the soil mound?

• Because the grass roots keep the soil in place

• Because the grass drinks all the water

• Because the grass makes the water colorful