ROCKS

ROCKS

(in the image: very rare rock called PAINITE)

FUN FACT: the first rock of this kind was found in the 1950s, and by 2005 only about 25 samples of this kind of rock have been found

Multiple Select

I study geology. I'm a ...

• geologian

• geologue

• geologist

• a person who studies rocks

Multiple Select

Where do you find rocks?

• inside volcanoes

• in the Earth's crust

• in space

• on the bottom of the sea

Multiple Choice

The layers of the soil are also called:

• levels

• horizons

• lengths

Multiple Select

Nutrients in the soil are provided by:

• humus

• rocks

• water

Multiple Choice

Which of the two feels SMOOTH?

• sand

• clay

Multiple Choice

Look at the two images.

In which of the two images is there less air between the particles?

• the picture on the left

• the picture on the right

Multiple Choice

TRUE or FALSE:

Are minerals and rocks the same thing?

• TRUE

• FALSE

Multiple Select

Rocks are made of:

• crystals of minerals

• chemical elements

Multiple Select

The crust of the Earth is made up of solid rock.

But inside the Earth it is very hot.

When rock is very hot, it becomes molten (hot and liquid).

This molten rock inside the Earth is called...

• lava

• magma

Multiple Choice

When magma cools, it solidifies and forms...

• metamorphic rocks

• igneous rocks

• sedimanetary rocks

Multiple Choice

Look at the two rocks in the picture:

Which of the two is an extrusive igneous rock?

• Rock on the left

• Rock on the right

Multiple Choice

Small fragments of rocks settle on the bottom of river beds and oceans.

Over time, more and more layers of sediment build on top of each other.

Due to pressure, these sediments squish together to form...

• metamorphic rocks

• sedimentary rocks

• igneous rocks

How can you tell that a rock is sedimentary?

• Sedimanetary rocks have layers

• Sometimes, these layers contain fossils

• They are made of grains or particles stuck together

• Often, there are tiny gaps between the grains, so the rock is POROUS

Multiple Choice

Deep underground it's very hot.

There, the high temperatures and pressure squish the grains in rocks closer together.

This makes the rocks very hard, and no longer porous.

These types of rocks are called...

• metamorphic

• igneous

• sedimentary

Metamorphic rocks

• Marble is a metamorphic rock

• Limestone is a sedimentary rock

• They are both made of Calcium carbonate

• What is the difference?

METAMORPHIC ROCKS

How do they form?

• underground: when high heat and intense pressure change the rocks

• on the surface of the Earth: when hot lava flows close to rocks on the surface of the Earth

• when the Earth's surface moves (e.g during earthquakes: rocks get pushed against each other; when this happens, the grains in rocks get crushed and forced very close together

Multiple Select

What happens during an earthquake?

• the grains/ particles in rocks are pushed against each other; the rocks are no longer porous

• metamorphic rocks are formed

• tectonic plates collide

• dogs and cats start acting strangely

Multiple Select

How are metamorphic rocks formed?

Select all the possible options!

• when high heat and pressure is applied to rocks underground

• when hot lava flows close to ricks on the surface of the Earth

• when the Earth moves (e.g. during an earthquake)

• when magma cools on or close to the surface of the Earth

Open Ended

What are the three kinds of rocks we looked at in this lesson?