Yr 8 AP Science Revision Tim HW

Question 1

Explain the effects that continental drift has had on the planet.

Answer 1

Answer-

Question 2

Magma

Answer 2

A very hot mixture of molten rock and gases that ins below the Earth’s surface.

Question 3

Dormant

Answer 3

Describes a volcano that has not erupted for more than 20 years but is not considered extinct.

Question 4

Tremor

Answer 4

Vibration on the Earth’s surface caused by an earthquake

Question 5

Epicentre

Answer 5

The point on the Earths centre directly above the site where the earthquake orignates. This site is called the focus.

Question 6

Seismograph

Answer 6

An instrument used to detect and measure the intensity of an earthquake

Question 7

Richter scale

Answer 7

A scale that measures the amount of energy released during an earthquake

Question 8

P waves or primary waves

Answer 8

Compression waves that move through the earth in the same way that sound moves through air.

Question 9

S waves or secondary waves

Answer 9

The second set of waves after p waves. These waves travel in the form of transverse waves

Question 10

Transverse waves

Answer 10

A wave in which the medium vibrates at right angles

Question 11

A very hot mixture of molten rock and gases that ins below the Earth’s surface.

Answer 11

Magma

Question 12

Describes a volcano that has not erupted for more than 20 years but is not considered extinct.

Answer 12

Dormant

Question 13

Vibration on the Earth’s surface caused by an earthquake

Answer 13

Tremor

Question 14

The point on the Earths centre directly above the site where the earthquake orignates. This site is called the focus.

Answer 14

Epicentre

Question 15

An instrument used to detect and measure the intensity of an earthquake

Answer 15

Seismograph

Question 16

A scale that measures the amount of energy released during an earthquake

Answer 16

Richter scale

Question 17

Compression waves that move through the earth in the same way that sound moves through air.

Answer 17

P waves

Question 18

The second set of waves after p waves. These waves travel in the form of transverse waves

Answer 18

S waves

Question 19

A wave in which the medium vibrates at right angles

Answer 19

Transverse wave

Question 20

Explain the process of subduction.

Answer 20

Answer-

Question 21

Subduction

Answer 21

Process in which two tectonic plates push against each other and oceanic crust sinks below the less dense continental crust

Question 22

Continental crust

Answer 22

The plates of earth that make up the land

Question 23

Oceanic crust

Answer 23

One of the types of crust that makes up Earths outer layer. Oceanic crust is thinner than continental crust and is made up of dense, heavy rocks such as basalt.

Question 24

Convection current

Answer 24

Circular movement that occurs when warmer, less dense fluid particles rise and cooler, denser fluid particles sink.
In the Earths case, the fluid is magma.

Question 25

Mantle

Answer 25

Thick layer inside the Earth below the crust. Most of the mantle is solid rock, though the upper part is molten rock called magma.

Question 26

Plate tectonics

Answer 26

The theory concerning the moving of the continental plates