<< Chapter < Page Chapter >> Page >

Natural sciences

The earth and beyond

Rock formations

Educator section

Memorandum

Igneous rock

1. cracks in the earth's crust

Key

2. earth's crust

3. lava cools and solidifies as grey / black basalt

4. red molten lava

5. crater of the volcano

6. magma forms lava

Assignment 5:

1. Magma (lava) will cool quickly as soon as it has erupted from the volcano and runs down the mountain slope

Reason: Little lava, exposed to the "cooler" atmosphere.

2. Granite is found deep underneath the crust

Reason: Magma has to cool slowly in order to form granite.

3. Deep underneath the earth's crust.

4. Deep underneath the earth's crust.

Reason: The surrounding rocks keep the magma hot for a very long time. Therefore, it cannot cool quickly.

5. Basalt is found on the slopes of the volcano.

Reason: Basalt forms when lava cools quickly. It has to be outside the crust.

6. The smallest crystals appear in basalt - thus on the mountain slopes and valleys near the volcano.

Leaner section

Content

WE ARE GOING TO STUDY THE DIFFERENT TYPES OF ROCK FORMATION

THAT FORM THE CRUST OF THE EARTH BECAUSE SEEDS DO NOT GROW EQUALLY WELL IN ALL KINDS OF SOIL.

  • Rocks, refers to the material that forms the earth's crust. Rock formations are grouped in three categories, namely igneous rocks, sedimentary rocks and metamorphic rocks.

Activity: to discuss igneous rocks as a type of rock formation [lo 2.1]

  • These rocks are the primary, original rock formation that made up the surface of the earth.
  • The earliest rock formations were igneous rocks that were formed when the planet started to cool down. The rocks are extremely hard and consist of several crystals.

Section through a volcano

KEY

1. ___________________________________________________________________

2. ___________________________________________________________________

3. ___________________________________________________________________

4. ___________________________________________________________________

5. ___________________________________________________________________

6. ___________________________________________________________________

We can work out how igneous rocks were formed by noting what happens to lava when there is a volcanic eruption. Lava cools down when it runs down the mountain slopes and begins to harden.

  • Basalt is formed after the eruption of a volcano. The lava cools down quickly, the crystals are small and the colour varies between dark grey and black. Sometimes the rock is perforated with small openings that are formed by small gas bubbles. This type of rock is used for pumice stone, which is used by people for rubbing off hardened dry skin on their feet.

  • The best-known rock formed from magma is granite. Granite is formed when magma cools down slowly below the surface of the earth. It is a very hard rock and mainly consists of white, black and cream-coloured crystals. The minerals in this type of rock are able to form larger crystals because the magma cools down so slowly.

ASSIGNMENT 5

Study the following diagram and answer the questions:

1. Where will the magma be able to cool down the soonest? Why?

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

(2)

2. Where do we find granite? Explain why.

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

(2)

3. Where will the largest crystals be found when the magma starts to harden?

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

(1)

4. Where will the magma cool down the slowest? Why?

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

(2)

5. Where will we find basalt? Explain why.

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

(2)

6. Where will the smallest crystals be found?

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

(1)

Summative: 10

Assessment

Learning Outcome 2: The learner will know and be able to interpret and apply scientific, technological and environmental knowledge.

Assessment Standard 2.1: We know this when the learner recalls meaningful information.

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
Ali
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
hey
Giriraj
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
ya I also want to know the raman spectra
Bhagvanji
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
Got questions? Join the online conversation and get instant answers!
Jobilize.com Reply

Get the best Algebra and trigonometry course in your pocket!





Source:  OpenStax, Natural sciences grade 6. OpenStax CNX. Sep 16, 2009 Download for free at http://cnx.org/content/col11079/1.1
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Natural sciences grade 6' conversation and receive update notifications?

Ask