Year 7 Topic 2 How can we manage rivers and flooding? (Key Vocabulary)

Question 1

Condensation

Answer 1

The change of state from gas to liquid.

Question 2

Precipitation

Answer 2

Any product of water vapour that falls under gravity.

The main forms of precipitation include rain, sleet, snow and hail

Question 3

Surface run off

Answer 3

When water reaches the ground and remains on the

surface.

Question 4

Groundwater flow

Answer 4

Water soaks right down and fills space in the rock, then flows very slowly.

Question 5

Evaporation

Answer 5

The change of state from liquid to gas that occurs when particles leave the surface of a liquid.

Question 6

Interception

Answer 6

Leaves and roots intercept some precipitation as it falls

Question 7

Mouth

Answer 7

The end of the river where it meets the sea

Question 8

Source

Answer 8

The start of the river

Question 9

Tributary

Answer 9

A stream or river that feeds into a larger watercourse

Question 10

Confluence

Answer 10

The point at which two rivers meet

Question 11

Channel

Answer 11

An area that contains flowing water confided by banks

Question 12

River Bed

Answer 12

The ‘floor’ of a ricer channel

Question 13

Watershed

Answer 13

The land that drains into a particular stream, lake or river

Question 14

Abrasion

Answer 14

The material carried by the river wears away at the bed and banks

Question 15

Hydraulic Action

Answer 15

The power of the water forces air into gaps in the banks and weakens them so they eventually collapse.

Question 16

Corrosion

Answer 16

Some materials in rock are dissolved slowly over thousands of years by weak acids in the water

Question 17

Attrition

Answer 17

The materials carried by the river (its ‘load’) collide with one another, making them smaller and smoother over time

Question 18

Saltation

Answer 18

Some of a rivers load is too heavy to float and bounces along the bed

Question 19

Traction

Answer 19

Larger stones can’t be carried at all so are rolled by the current along the river bed

Question 20

Suspension

Answer 20

Very light parts of the load (like soil) are carried along, floating above the bed

Question 21

Solution

Answer 21

The smallest pieces of load are so small we cannot see them. They have been dissolved into the river water

Question 22

Permeable

Answer 22

A surface that lets water soak in

Question 23

Impermeable

Answer 23

A surface that wont let water soak in

Question 24

Infiltration

Answer 24

The action of water soaking into the ground

Question 25

Corrasion

Answer 25

Wearing away of the river bed and banks by the load hitting against them.

Question 26

Erosion (upper course)

Answer 26

The mechanical wearing away of rock

Question 27

Transportation (middle course)

Answer 27

The movement of the eroded material by the river

Question 28

Deposition (lower course)

Answer 28

Is the dropping of the material when the river looses energy and creates features