E.5 classifying rocks

Question 1

what is Igneous rock

Answer 1

Rock formed from cooled magma (from the mantle)

Question 2

What is intrusive igneous rock?

Answer 2

Cools below Earth’s surface Ex) granite

Question 3

What is extrusive igneous rock?

Answer 3

Cools above Earth’s surface Ex) obsidian

Question 4

What is sedimentary rock?

Answer 4

Formed by settling of sediments that are compacted into rock ex) sandstone, limestone

Question 5

What is Strata rock

Answer 5

Layers of sedimentary rock

Question 6

What is Metamorphic rock

Answer 6

Rock that has changed form because of great heat and pressure ex) gneiss, marble

Question 7

How do extrusive rocks look different ?

Answer 7

Extrusive rocks have finer (small) grains because they cooled quicker and has less time to for crystals to grow

Question 8

What are sediments and how do they pile up?

Answer 8

Sediments are small pieces of rocks eroded off by wind or water and deposited somewhere else

Question 9

How can we tell how long a rock has been under great pressure and heat?

Answer 9

The longer a rock has had under pressure and heat the larger the grains