1Daily Warm-Up Exercises 1

Day 6

Is the above statement true or false? Explain.

False. Some form on Earth's surface from molten rock that is released when a volcano erupts.

All igneous rocks form underground.

2

Igneous & Metamorphic Rocks(Part 1, steps 7-15)

Investigation 8

One Rock to Another

3

Layers of the EarthInner Core:

•At the center of the Earth•Solid iron and nickel

Outer Core:•Surrounding the inner core•Molten iron and nickel

Mantle:•Between the crust and core

•Lower part is a soft (plastic) solid

•The part we stand on•If Earth were an egg, the crust would be the shell

•The most massive part of Earth

Crust:•The thin outer surface of the Earth

4

Extrusive igneous rock forms when lava cools on the surface of the Earth

Intrusive igneous rock forms when magma cools below the surface of the Earth in the crust

Called lava on the surfaceexamples: obsidian, pumice, tuff, scoria,

basalt

example: granite

Igneous Rocks

5

Called lava on the surface

Metamorphic Rocks

• Metamorphic means “changed”

• Rocks that have changed from other types of rock

• The change is brought about by pressure and/or heat

6

Metamorphic Rocks

Pressure occurs when

1. Rocks are buried deep in the Earth

2. Magma pushes up from below

Heat occurs when rocks are covered with magma

Heat and Pressure result when rocks are pressed down close to magma

7

When rocks get so hot that they melt, they turn into magma

If magma resolidifies, it is a new igneous rock

Metamorphic rocks never completely melt

Metamorphic Rocks

8

Source and Morph Rocks

All metamorphic rocks form from a source rock

Source Rock (the original rock that changes)

Morph Rock

limestone

Heat and/or Pressure

marble

9

Source and Morph Results

Source Morph

shale slate

shale or mudstone schist

sandstone quartzite

granite gneiss

10Daily Warm-Up Exercises 10

Essay QuestionWhat forces are constantly shaping and reshaping Earth’s surface? (Hint: constructive/ destructive)Earth processes are going all the time. Destructive processes break down landforms. These include weathering, erosion, and tectonic plates sinking and melting. Constructive processes build up. They include mountain building, deposition (sedimentation), and new crust formation.