erosion and weathering

 What is erosion?

• the process of moving water, moving ice, or wind carrying away a part of a rock
• the process of a part of a rock loosened usually by nature
• a natural event that happens quickly, such as lightning striking a tree

Weathering and erosion are effects. What can cause weathering and erosion?

• lightning, fire, or a tree
• moving water, moving ice, or wind
• pieces of rock, sand, or dirt

Read this paragraph from the article."Wind also causes weathering and erosion. Wind can blow sand and dirt. It can carry the dirt far away. In some places, strong wind will push sand against rocks. Over a long period of time, the wind wears down those rocks."
What can you infer from this paragraph about the strength of wind and how fast it wears down rocks?

• A wind's strength has no effect on how fast it wears down rocks.
• The stronger the wind blows, the more slowly it wears down rocks.
• The stronger the wind blows, the faster it wears down rocks.

What is the main idea of this text?

• Solid sheets of ice can cause weathering and erosion as they move slowly down a mountain.
• Weathering and erosion are natural events that slowly wear down rocks.
• Waves can chip off pieces of rock and turn them into sand.

A sheet of ice on a mountain can cause weathering and erosion _______ it moves down the mountain.

• when
• before
• after

Read this paragraph from the article."Moving water can cause weathering and erosion. Have you ever seen waves crash against rocks on the shore? The water can chip off small pieces of rock and carry them away. As more waves hit the rocks, more pieces are chipped off and carried away. Because of this, the rocks get smaller and smaller over time."
Why does the author ask the question, "Have you ever seen waves crash against rocks on the shore?"

• to suggest that readers visit a beach in order to better understand weathering and erosion
• to help readers who have never been to a beach imagine what a beach looks like
• to help readers see how moving water can cause weathering and erosion