Rocks

Question 1

what are the 3 rock families

Answer 1

igneous, sedimentary, metamorphic

Question 2

describe igneous rocks

Answer 2

formed from a hot liquid that cooled down and solidified. Example: granite, besalt, obsidian, andesite, gabbro

Question 3

describe sedimentary rocks

Answer 3

formed from broken pieces of other rocks that were transported, deposited and compacted. Example: sandstone, shale, breccia, conglomerate, limestone

Question 4

describe metamorphic rocks

Answer 4

formed when pre-existing rock changes forms because of high heat and pressure. Example: slate, schist, gness

Question 5

describe the rock cycle

Answer 5

a slow, ongoing process of forming rocks.

Question 6

what are the types of weathering?

Answer 6

mechanical, chemical, biological

Question 7

what is mechanical weathering

Answer 7

physically breaking down rocks into smaller bits

ex: sandblasting rocks with sand

Question 8

what is chemical weathering

Answer 8

chemically attacking the rock to dissolve/corrode it

ex: calcite/limestone in acid rain

Question 9

what is biological weathering

Answer 9

when living things contribute to breaking down rocks

ex: tree roots cracking a building’s foundation