Volcanoes part 3

Question 1

Batholith

Answer 1

forms when magma cools in the crust to form granite. Then it changes (metamorphoses) the rock around it to form other rocks.

Question 2

Sill

Answer 2

Horizontal intrusion of magma between rock strata (layers).

Question 3

Dyke

Answer 3

Vertical intrusion of magma.

Question 4

Laccolith

Answer 4

Horizontal intrusion of magma in the crust but bulges up.

Question 5

Lopolith

Answer 5

Horizontal intrusion of magma in the crust but bulges down.

Question 6

Positive effects of volcanoes (6)

Answer 6

1-Fertile soil
2-Tourism
3-Geothermal energy
4-Rock
5-Minerals and metals
6-New land

Question 7

Negative effects (7)

Answer 7

1-Death
2-Buildings and infrastructure destroyed.
3-Economic costs
4-Forestry destroyed
5-Fish kills
6-Acidification of water
7-Polluted air-pyroclast

Question 8

Prediction of volcanic eruption (6)

Answer 8

1-Increased gases (sulphur)
2-Fish kills in lakes and rivers due to increased acid.
3- Seismic activity- vibrations
4-Ground deformation-change in shape of slope.
5-Location on plate boundary.
6-History of eruption.