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What is sediment?
Strong winds
Deep bodies of water
Large pieces of ice
Tiny pieces of rock
How long does it take for wind to change the shapes of rocks on Earth's surface?
One month
A few days
One year
Very long time
In October, a strong storm came to Hanoi. The water in the Hong River rises and flows over its edges into the streets. What is happening?
The river is flowing uphill.
The wind is making a gorge.
A flood occurs and the water overflows its banks.
The water is emptying into a stream.
How can an eruption change Earth’s surface? (choose more than one)
It makes a huge hole on the top of a volcano.
It turns the Earth’s surface into flat areas.
The eruption can kill all living things on a volcano.
The lava hardens into a layer of rock...
Which of the following materials can erupt from a volcano?
Water and sediment.
Only melted rock.
Magma, gases, and ash.
Water and sediment.
When playing in a stream in Ba Vi National Park, you find beautiful, smooth rocks. How did they get so smooth?
The wind blew on them for one day.
Water carried sediment that rubbed against the rocks over ti
They fell from the flatter ground.
People painted them to look smooth.
You take a boat ride on the Nho Que River in Ha Giang. You look up and see very tall, narrow rock walls on both sides. What is this landform called?
A hill
A beach
A gorge
A mountain
Some areas in Ho Chi Minh City flood easily during heavy rain because they are built low, similar to New Orleans. If the nearby canals and rivers get too full, what happens?
The water turns into tiny pieces of rock.
The water carves a tall, narrow passage.
The water moves a sand dune into the city.
The water overflows and can damage buildings and roads.
Which statement about volcanoes is true?
Volcanoes do not change the Earth's surface at all.
Theys take thousands of years to change the Earth's surface.
The changes caused by a volcano can happen very fast.
Volcanoes are mainly formed by wind moving sand
Why is the city of New Orleans geographically at high risk for flooding?
It is built on land that is mostly above sea level.
It is built inside a rocky gorge.
It is built on land that is mostly below sea level.
It is located right next to a volcano.
True or False: Wind can wear away rock and change Earth's surface
True
True or False: The shapes of the rocks can be changed by water in just a few days.
False
True or False: Grains of sand are huge pieces of rocks.
False
True or False: Flood water is safe and cannot damage buildings and roads.
False
True or False: Wind moves a sand dune much more quickly than it can carve rock.
True
Fill in blank: Wind and water can __________ rock pieces.
carry
