2nd Grade Science : Compare ways to prevent wind/water from changing land shape

Study concepts, example questions & explanations for 2nd Grade Science

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Example Questions

Example Question #1 : Compare Ways To Prevent Wind/Water From Changing Land Shape

The hill near the playground has been changing over the last few months. During heavy rain, the dirt is being quickly washed off the hill. This is a problem for the class because the students are unable to play in this area since it is unstable and unsafe.

Which solution would be best to prevent the wind and water from changing the hill?

Possible Answers:

Plant new grass. The roots will hold the dirt steady and absorb the water.

Leave the soil alone; there is nothing that can be done.

Cover the hill in leaves. The leaves will soak up the rain and stop the dirt from moving.

Install a new slide on the hill. Adding a slide will block the rain from reaching the hill.

Correct answer:

Plant new grass. The roots will hold the dirt steady and absorb the water.

Explanation:

The best option to prevent the hill from continuing to be eroded is to plant new grass. The roots of the grass will absorb water and hold the dirt in place. As wind and rain wear things down and move them away, humans must come up with solutions to prevent it from getting worse. The other answers are not reasonable or will not work. Leaves will not absorb the water and will wash away, leaving it alone will allow the problem to get worse, and putting a slide on the hill is dangerous!

Example Question #2 : Compare Ways To Prevent Wind/Water From Changing Land Shape

Our land is changed when wind and water break down the soil and wash it away. Hurricanes in the South cause a lot of damage and change the area in very severe ways. Below is a picture of the damage from Hurricane Katrina in New Orleans.


New Orleans, Louisiana, After Hurricane Katrina, City

What could the city do to prevent the water from changing the shape of the land and damaging the buildings in the future?

Possible Answers:

Scoop up all the water as it floods and put it back in the ocean.

Build barriers to stop the water from flowing into the city.

Move the city to another area because this one is damaged.

Plant bushes and flowers along the edge of the town to soak up all the water.

Correct answer:

Build barriers to stop the water from flowing into the city.

Explanation:

The damage from Hurricane Katrina permanently changed the area and the land of New Orleans. The floodwaters destroyed many buildings, and when the water receded to the ocean, it dragged dirt, rocks, and debris along with it changing the landscape. The city could install barriers or levees to block the water from passing into the city. There were already some in place, but there could be taller levees installed or more of them.

Example Question #4 : Effects Of Wind And Water On Landscapes

Many times farmers face strong winds, and they can damage crops and change the shape of the land. Below you will see an image of a wheat field on a sunny day and then after a dust storm.

Cornfield, Field, Wheat Field, GrainBuried, Devastated, Devastation, Sandstorm, Dust Bowl

Farmers will often plant tall plants and shrubs alongside their wheat. Why would these plants help prevent the wind from changing the landscape and damaging crops?

 

Possible Answers:

The plants absorb the water that is in the soil, which helps the wheat.

The plants act as a windbreak or a barrier against the wind.

The plants absorb all of the wind that is in the air.

The plants would do nothing to help with the wind storms, so they should not be planted.

Correct answer:

The plants act as a windbreak or a barrier against the wind.

Explanation:

Shrubs and tall plants next to fields of wheat, corn, and other crops help act as a windbreak and stop the wind and dust from tearing up the fields. If the soil is very dry, it will get swept up by the strong winds and create a tornado-like force that will bury all of the crops in dust and dirt. The shrubs block the soil from being picked up, and the wind from pushing through the crops the farmers are growing.

Example Question #1 : Compare Ways To Prevent Wind/Water From Changing Land Shape

What caused erosion and the changes to the land to create this landform?

Desert, Horsheshoe Bend, Grand Canyon

Possible Answers:

Snow

Humans

Wind and water

Animals

Correct answer:

Wind and water

Explanation:

This beautiful canyon was formed by years and years of wind and water pushing through the ground and blowing against the sides. Erosion is the movement of broken down Earth to new places, and that is what the river and wind in this area have done. The water races through the canyon, cutting a path while the wind blows tiny particles of soil and sand into the walls breaking it away slowly and moving it to new places. Many times humans get involved and try to prevent wind and water from damaging areas.

Example Question #2 : Compare Ways To Prevent Wind/Water From Changing Land Shape

The soil around Maddie's farm is becoming very dry and loose. When the wind blows many pieces are picked up and blown around her fields. This process is called desertification. The area is turning into a desert because of the wind and dry soil.

What can Maddie do to prevent the wind or water from changing the land's shape?

Possible Answers:

Plant all of the crops underneath a large roof so rain cannot reach them.

Nothing can be done to help the farm, Maddie should move.

Move the plants to a different field, park the tractors near them, and water once a week.

Water the soil, plant tall shrubs, and rotate crops.

Correct answer:

Water the soil, plant tall shrubs, and rotate crops.

Explanation:

This is a widespread problem on many farms, especially in the mid-West, where it is very dry and can get windy. The best option to prevent the wind and water from changing the land's shape and damaging her farm is to water the soil to keep it wet and less dusty, plant tall shrubs to help block the wind, and rotate the crops, so the nutrients in the ground are not all used up. If farms are left to become very arid and dusty, it can create large dust storms and damage property and change the land over many miles.

Example Question #1 : Compare Ways To Prevent Wind/Water From Changing Land Shape

Which solution would be the best and most reasonable for stopping wind and water from changing the shape of the land?

Possible Answers:

Move all the sand away from the beach so the water cannot touch it.

Plant shrubs and trees to hold the soil together.

Place large tarps on the sides of cliffs so the rain cannot touch the rocks.

Place large umbrellas near the sides of cliffs to block the wind.

Correct answer:

Plant shrubs and trees to hold the soil together.

Explanation:

The best and most reasonable way to stop wind or water for changing the shape of the land would be to plant shrubs and trees to hold the soil together. Tree roots stabilize and secure the soil helping it from being eroded. This process can help control erosion (the movement of broken-down materials), so there are fewer changes to the Earth.

 

Example Question #2 : Compare Ways To Prevent Wind/Water From Changing Land Shape

Our land is changed when wind and water break down the soil and wash it away. Hurricanes and flooding cause damage when rocks, dirt, and sediment are carried away.

High Water, Danube, Ulm, Road

A city wants to prevent flooding of this level during the next storm. Which answer choice would NOT be a good way to prevent the land from being changed?

Possible Answers:

Build a dam to stop water from moving into the towns.

Place large umbrellas near the sides of the town to block the rain.

Construct new ways to irrigate the town and push water out.

Build barriers to stop the water from flowing into the city.

Correct answer:

Place large umbrellas near the sides of the town to block the rain.

Explanation:

Floodwaters rush into the city and destroy homes, roads, and tear up plants. It would NOT be a good idea to place large umbrellas near the sides of the town to block the rain to stop the land from changing. This would not prevent a flood or keep erosion from taking place.

Example Question #3 : Compare Ways To Prevent Wind/Water From Changing Land Shape

Fire Island in New York has an eroding shoreline. Over the years, waves have washed away much of the beach.

sandy beach with rippled pattern and dune grasses

What can the state of New York do to prevent further changes to the beach?

Possible Answers:

Build a dam to stop the ocean from moving towards the beach.

Build barriers to stop the water from touching the sand.

Leave the beach alone; there is nothing that can be done.

Add more sand and plants to the shoreline.

Correct answer:

Add more sand and plants to the shoreline.

Explanation:

Beach erosion is widespread and changes the shape of the land forever. The most reasonable and practical way to slow the wind and water would be to bring in sand and plants to rebuild the beach; this will add more shoreline and help to strengthen the coast. This should help slow some of the erosion and stop the land from changing.

Example Question #4 : Compare Ways To Prevent Wind/Water From Changing Land Shape

What caused erosion and the changes to the land to create this landform?

A wave crashes into the rocks at Ship Harbor.

Possible Answers:

Vegetation and wind

Erosion did not create this landform.

Water and vegetation

Wind and water

Correct answer:

Wind and water

Explanation:

This cliffside was formed by years and years of wind and water pushing through the ground and blowing against the sides. Erosion is the movement of broken down Earth to new places, and that is what the ocean and wind in this area have done. The water smashes into the cliffside, cutting a path while the wind blows tiny particles of soil and sand into the walls breaking it away slowly and moving it to new places. Many times humans get involved and try to prevent wind and water from damaging areas.

Example Question #3 : Compare Ways To Prevent Wind/Water From Changing Land Shape

         
 
 
What do these two aerial photos of the same shoreline taken years apart tell scientists?
 
 
Possible Answers:

Scientists cannot learn anything from these photos of the shoreline.

There have been changes to the shoreline over the years.

There have been no changes to the shoreline over the years.

There have been changes to the shoreline over the years, but then it changed back.

Correct answer:

There have been changes to the shoreline over the years.

Explanation:

These aerial photos allow scientists to make comparisons of the same area over time to look for changes or similarities. In these photos, scientists could see that the shoreline has changed over the years. There is a reduction in the land visible, and more of it is underwater. The coastline has receded and become more narrow.

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