Rocks

Question 1

What rocks contain fossils?

Answer 1

sedimentary rocks

Question 2

How are igneous rocks formed?

Answer 2

Igneous rocks form when hot, molten rock cools and solidifies.

Question 3

How are sedimentary rocks formed?

Answer 3

Formed either by rock fragments or organic matter being bound together or by chemical precipitation

Question 4

How are metamorphic rocks formed?

Answer 4

Metamorphic rocks are formed when other rocks are affected by great temperatures and pressures. The chemicals they contain may change their forms, or crystal shapes.

Question 5

What are the 3 subgroups of sedimentary rocks?

Answer 5

Clastic, Biologic (organic), and Chemical

Question 6

What is the difference between the formation of intrusive and extrusive rocks?

Answer 6

Extrusive rocks are formed on the surface of the Earth from lava. Intrusive rocks are formed from magma that cools and solidifies within the crust of the planet.

Question 7

How are the 3 subgroups of sedimentary rock formed?

Answer 7

Clastic sedimentary rocks are made of sediments. Chemical sedimentary rocks are made of minerals that precipitate from saline water. Organic sedimentary rocks are made from the bodies of organisms.

Question 8

What are the 2 subgroups of metamorphic rock and how are they formed?

Answer 8

Foliated and Nonfoliated. Nonfoliated metamorphic rocks are formed under high temperature, and LOW PRESSURE. Foliated metamorphic rocks are formed within the Earth’s interior under extremely high pressures that are unequal

Question 9

What is the most durable igneous rock?

Answer 9

Granite

Question 10

What is the cooling rate and grain size of Intrusive rocks?

Answer 10

Intrusive igneous rocks cool from magma slowly because they are buried beneath the surface, so they have large crystals

Question 11

What is the process of how a rock can change into an igneous rock?

Answer 11

if a sedimentary rock gets hot enough and melts it can rise up towards the surface and cool down into an igneous rock.

Question 12

What is the process of how a rock can change into a sedimentary rock?

Answer 12

Rocks can become sedimentary rocks by weathering, erosion, deposition, and compaction. Rocks at Earth’s surface breaks down into sediments by weathering. Erosion carries the sediments and deposits them in layers. Over time, these layers become buried and compacted to form sedimentary rock.

Question 13

What is the process of how a rock can change into a metamorphic rock?

Answer 13

Metamorphic rocks form when rocks are subjected to high heat, high pressure, hot mineral-rich fluids or, more commonly, some combination of these factors.

Question 14

What is the difference between weathering and erosion?

Answer 14

Erosion is the process in which rock particles are carried away by wind and water. Weathering, on the other hand, degrades the rocks without displacing them.

Question 15

What is meant by a parent rock?

Answer 15

Parent Rock is the original rock from which younger rock or soil is formed.

Question 16

What is the rock cycle?

Answer 16

The rock cycle is a web of processes that outlines how each of the three major rock types igneous, metamorphic, and sedimentary form and break down based on the different applications of heat and pressure over time.

Question 17

How are pumice formed? What is its grain size?

Answer 17

Pumice is an extrusive igneous volcanic rock formed through the rapid cooling of air-pocketed lava; fine grained

Question 18

How is granite formed? What is its grain size?

Answer 18

Phaneritic and coarse grain size; It forms from the slow crystallization of magma below Earth’s surface.

Question 19

What are the features of igneous, metamorphic, and sedimentary?

Answer 19

Igneous rocks are formed from melted rock deep inside the Earth. Sedimentary rocks are formed from layers of sand, silt, dead plants, and animal skeletons. Metamorphic rocks formed from other rocks that are changed by heat and pressure underground.

Question 20

Phaneritic cooling rate and grain size

Answer 20

Large or Coarse grained; Intrusive

Question 21

Aphanitic cooling rate and grain size

Answer 21

Very fine grained; Extrusive

Question 22

Porphyritic cooling rate and grain size

Answer 22

Porphyritic textures are found in rocks with both coarse and fine-grained and intrusive

Question 23

How does a rock transform into other types of rock?

Answer 23

The processes that change one rock to another are Weathering, deposition, and Erosion. Any rock can transform into any other rock by passing through one or more of these processes.

Question 24

What are extrusive rocks?

Answer 24

Cools quickly; fine grained

Question 25

What are intrusive rocks?

Answer 25

Coarse and large grained; cools slowly

Question 26

What is the cooling rate and grain size of extrusive rocks?

Answer 26

Extrusive igneous rocks cool from lava rapidly because they form at the surface, so they have small crystals.

Question 27

How are obsidian formed? What is its grain size?

Answer 27

Obsidian is an igneous rock occurring as a natural glass that is formed by the rapid cooling of viscous lava from volcanoes.; None

Question 28

Explain how the angularity of rocks is related to weathering.

Answer 28

The more weathering it does The crystals or grains that remain highly angular indicate little tumbling or transportation has occurred. While very rounded grains may indicate transportation by fast moving water.