A
The breakdown of rock into smaller pieces.
Weathering
When soil, rocks or sand are moved by wind, water ot glaciers.
Erosion
A large thick sheet of moving ice.
Glacier
When water freezes it expands. True or false?
True
A landform made from the rich soli and rocks dropped by the moving river.
River Delta
What causes cracks in the rocks for weathering to happen?
1. Tree roots push into stones
2. Animals burrow into the ground
When frozen ice becomes water it is called:
Thawing
Erosion is caused by patterns of freezing and thawing. True or false.
False
Weathering causes rocks to become sharp and lesa rounded. True or false?
False
What causes erosion?
Wind, Water, and Glaciers.
What will happen to the trees if river banks are eroded?
1. Roots are uncovered
2. Plants that need soil may be affected and may fall.
River delta is a landform. True or False?
True
Shaking of Earth's surface is called:
Earthquake.
All Earthquakes are strong and felt. True or False.
False. Most of them are too weak.
What can happen if Earth's crust moves?
Earthquakes and Volcanoes.
A mountain made of cooled lava, ash or other materials is called:
A volcano
How does a volcano happen?
One pieces of crust slides under the other, this causes the rocks to melt and move upward.
Melted hot rock moving inside a volcano is:
Magma
Erupted melted rocks reaching the opening of a volcano is called:
Lava
How does a flood happen?
It happens when too much rain falls in a too short time.
It is a change that happens when streams rivers or get too full or overflow.
What happens to animals and plants when there is a flood?
Plants may die and animals may have to find new homes.
A dirt that is loosened from the side of a hill or a mountain and slides downhill is called:
Mudslide or landslide
How does weathering happen?
Tree roots or animals make cracks in the rocks. Changing seasons cause patterns of freezing and thawing. When water moves into cracks and freezes it expands, then when it thaws it widens the cracks and pieces of rock may break off.
Explain how river delta happens.
River water erodes the soli from the river banks, as the river nears the ocean the water slows down and the soil and rocks are left behind. Over timw this forms a delta. Rich in nutrients for plant growth.
Mention the components of an Emergency list:
First aid kit, medicine, food, clean water, clothes and sleeping bag.
Radio, batteries, flashlight, and evacuation guide (maps).