Classifying and Defining Rocks

Aim

The students will be able to define Igneous, Sedimentary, and Metaphoric rocks.

The students will be able to identify different characteristics of different rocks

The students will be able to compare and contrast similarities and differences between rocks

The students will be able to explain why different rocks belong in certain groups

Question of the day

List 5 things that are made from rocks?

= ?

Mini lesson on making comparisons

one syllable adjective = add –er

two or more syllable adjective = more + adjective

adjectives that end in y with more than one syllable = add –er

Examples: rough rougher jagged more jagged

How to speak descriptively and make comparisons

Things made from rocks

Tombstones are made of granite (also gabbro and syenite).

Many kitchen counters are made of granite.

Things made from rocks

Basalt helps to make heat and fire resistant insulation for jackets and building material .

Helps to make sports equipment like tennis rackets.

Things made from rocksHighways are made of sedimentary rocks

Bathroom tiles are made of slate, granite or marble

Things made from rocks

Granite and concrete helps to make skyscrapers.

The White House is made of sandstone.

Things made from rocksThe famous statue of David by Michelangelo is made of marble

Blackboards are made of slate.

Chalk is made of limestone (a type of sedimentary rock)

What are the three main rock groups?

Rock Classification Chart

Rock Groups Origin(how are the rocks formed?)

Uses(What can be made from this rock?)

Texture(what does it

feel like?)Appearance(what does it

look like?)

Mineral Compositi

on(consists of/made up of…)

Type Example

Igneous

Sedimentary

Metamorphic

Igneous Rocks(1st part of the Rock Cycle)

• Form (Are made) after molten (liquid) rocks have become cool and hard

•Can forms underground or below a volcano when the liquid magma gets trapped (stuck) inside the volcano

•Can form at the surface (outside) of a volcano after volcanoes erupt and the magma fall on the surface

Adjectives to describe igneous rocks

* Texture - smooth * Texture rough*weight - lightweight* appearance - dull

*texture - smooth*appearance- shiny*appearance - angular

Sedimentary Rocks(the 2nd part of the rock cycle)

•Are formed through different processes (steps) (erosion, deposition compaction, and cementation)

•Most sedimentary rocks are formed when mud, sand, leaves, remains of living things, bones or bits (small pieces) of rocks are pressed together. This forms sediment.

•When the sediment pile becomes very heavy the top layer and the lower level are pressed together.

Adjectives to describe sedimentary rocks

*texture – rough*appearance - angular

*appearance – jagged*appearance – layered*color – gray*texture – rough

*Color - multi-colored*Texture – rough*appearance - jagged

Adjectives to describe sedimentary rocks

Metamorphic Rocks (the 2nd part of the rock cycle)

•Are new types of rocks that are formed underground from the change in heat and pressure

•Any rock (igneous rocks, sedimentary rocks, or other metamorphic rocks) can change into Metamorphic rocks

•When metamorphic rocks break down (become smaller parts) they become sedimentary rocks.

Adjectives to describe metamorphic rocks

*appearance – layered*appearance - flat*Colors – gray, red, black, green, purple*color - dull

*texture - not very hard*texture - smooth

*Appearance – layers and bands*Texture - rough

Review ActivityRead the questions.

Choose the best answer.

Match the question to the correct answer.

Question: ……….? ………………

Answer!

……………..

Quiz

Picture for question 13

Wrap up

What did you learn today?

Have a nice day!