Rocks

Question 1

What is the study of rocks called?

Answer 1

Geology

Question 2

What are the 3 categories of rock?

Answer 2

• Igneous rock
• Sedimentary rock
• Metamorphic rock

Question 3

Describe the basalt rock

Answer 3

• Forms at volcanoes and fissure eruptions
• Dark black/brown
• No crystals visible due to rapid cooling
• Used for road chippings
• Found in the ‘Giants Causeway’, Co. Antrim

Question 4

Describe granite

Answer 4

• Magma pushes into the crust but doesn’t reach the surface
• Pale grey/pink
• Large crystals visible due to slow cooling
• Used for worktops
• Found in Wicklow mountains and Mourne mountains (Co. Down)

Question 5

Name 2 examples of an Igneous rock

Answer 5

Basalt and granite

Question 6

Name 2 examples of a sedimentary rock

Answer 6

Limestone and sandstone

Question 7

Name 2 examples of metamorphic rocks

Answer 7

Marble and quartzite

Question 8

Describe the igneous rock formation

Answer 8

• Volcanic activity
• Lava cools quickly forming basalt (this is an extrusive rock) - (forms on earths surface)
• Magma cools slowly forming granite (this is an intrusive rock) - (formed inside the earths crust)