Weathering, Erosion, Deposition
What are the two types of glacier movements?
Flowing and sliding.
What percentage of earth do glaciers cover?
10%
How does a kettle lake form?
A block of ice forms a depression in the ground. The block of ice melts and fills the depression with water.
Describe a continental glacier
A continental glacier is also called a ice sheet. They are much larger than alpine glaciers and can cover whole continents.
What is a delta? Explain weathering, erosion, and deposition work together to form a delta.
A delta is a fan shaped deposit of sediment build up at the mouth of a lake. Weathering breaks down the rock. Erosion moves the sediments and deposition deposits them in a fan shaped build up of sediment at the mouth of a river.
Identify a river delta and describe how it forms.
A delta is a fan shaped deposition of sediments that is built up at the mouth of a river, where it empties into the ocean. Weathering breaks down the rocks, erosion moves them and deposition deposits them at the mouth of a river where the sediment piles up into a delta.
What is a glacial erratic?
A glacial erratic is a large boulder left behind when the glacier carrying it melts.
How does a glacier change a valley?
A glacier can change a V shaped valley into a U shaped valley.
What is a glacier?
A glacier is a large mass of ice that moves over land.
Identify a meander and an ox bow lake, and explain how oxbow lakes form.
A meander forms when the water slowly ships away at the soil and it eventually turns into a curve. An oxbow lake forms when the meander is bypassed, leaving a crescent shaped depression filled with water.
Define an alpine glacier
An alpine glacier is also called a valley glacier. It forms in mountains and flows through valleys causing them to become U shaped.
Define oxbow lakes and meanders and explain how they are related.
An oxbow lake is a bypassed meaner. A meander is a curve in a lake. They are related because a oxbow lake is just a bypassed meander.
What is erosion? What process forms the particles that are involved in erosion?
Erosion is when sediments are moved from their current location Weathering is what forms the sediments that are moved in erosion.
Describe how a moraine forms. Be specific.
Glaciers cause erosion and transport sediments called till. A moraine forms when a deposit of till is left behind by a retreating glacier. Lateral moraines are ridges of till left at the sides of a glacier. End moraines form at the end of a glacier. Ground moraines are a blanket of till left along under the bottom of a glacier.
How does a moraine form?
Moraines are till left behind by a retreating glacier. Glaciers pick up till on its bottom, sides and front. When it melts, it leaves the till behind in lateral, end, and ground moraines.
What is the main fore that causes erosion and deposition?
The main force is called gravity.
What is erosion?
The process in which sediments are deposited.
What are the three main agents of erosion?
The three main agents are wind, water and ice.
Compare and contrast physical and chemical weathering . Include one way they are similar and two ways they are different.
They both break down rock. Physical weathering only changes the shape but not composition. Chemical weathering changes composition but not a lot of the rocks physical form.
Define Till
Till is sediment left directly on the ground by a retreating glacier.
What process forms the particles that are involved in erosion?
Weathering breaks down the rocks into sediments and then erosion moves them.
What is weathering? What are the two main types of weathering?
Weathering is the process that breaks down rocks. The two types of physical and chemical.
Define and identify examples of weathering, erosion and deposition.
Weathering= Rocks are broken down into sediments. Erosion= when the sediments are carried away from their original place. Deposition=When the sediments journey ends and they are rested down again.
What is deposition?
When sediments are deposited in a new location
