science

Question 1

Names and relative sizes of sediments

Answer 1

Boulder, gravel, sand, silt, clay

Question 2

What is physical/mechanical weathering

Answer 2

Physical weathering is the breakdown of rocks and minerals on Earth’s surface due to physical processes such as temperature changes, wind, water, ice, or the actions of organisms.

Question 3

What is chemical weathering

Answer 3

Chemical weathering is the erosion of rocks caused by chemical reactions

Question 4

What causes mechanical/physical weathering

Answer 4

Mechanical/physical weathering is caused when water, ice, salt/mineral crystals, the release of pressure, extreme temperatures, wind, or even the actions of plants and animals break down rocks

Question 5

What causes chemical weathering

Answer 5

Chemical weathering is caused when the rainwater comes into contact with minerals in the rock

Question 6

What are examples of chemical weathering

Answer 6

rust, which happens through oxidation and acid rain, caused from carbonic acid dissolves rocks

Question 7

What is an example of mechanical/physical weathering

Answer 7

An example of this is frost wedging, where water freezing and expanding within the cracks of rocks causes them to break down.

Question 8

What affects the rate of weathering

Answer 8

Type of rock, water, wind, glaciers, rocks/sediments

Question 9

What is the difference between weathering, erosion and deposition

Answer 9

Weathering is where rocks and minerals are broken down by the elements of nature into smaller pieces. Erosion is the movement of broken-down, weathered rock from place to place, and deposition means the laying down, or depositing, of broken rock.

Question 10

What affects the rate of erosion? And deposition?

Answer 10

Type of rock, water, wind, glaciers, rocks/sediments,
gravity

Question 11

How does sediment sorting happen?

Answer 11

Energy and gravity

Question 12

What are examples of landforms created or altered by water erosion

Answer 12

Streams, coasts, underground and river deltas

Question 13

Examples of landforms created or altered by wind erosion

Answer 13

Dunes

Question 14

What is the importance of mangroves to coastal areas

Answer 14

Wide areas of mangroves can reduce tsunami heights, helping to reduce loss of life and damage to property in areas behind mangroves

Question 15

What is mass wasting, including examples

Answer 15

Mass wasting is the movement of rock and soil down slope under the influence of gravity. Some examples are rockfall, mudslide, slump/creep

Question 16

What affects the rate of mass wasting?

Answer 16

Slope, plants, water and type of rock