1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
oee [108]
3 years ago
12

Information about rocks and minerals

Biology
2 answers:
inn [45]3 years ago
5 0
Earth's crust is made of rock, and rock is made of natural substances called minerals. There are three main types of rock: sedimentary, igneous, and metamorphic rock. Each type is produced in different ways. The oldest rocks on Earth were formed about 3.8 billion years ago.
Snezhnost [94]3 years ago
3 0
Minerals are naturally occurring substances formed by geological processes. They are usually solid and feature a crystal structure as well as specific physical properties and chemical composition.

Physical properties of minerals include crystal structure, hardness (Mohs scale), lustre (how it reflects light) and color, as well as more complicated properties such as streak, fracture, cleavage and density.

Mohs scale of hardness measures the ability of minerals to scratch each other. Talc is very soft and is listed as 1, diamond is very hard and is measured as 10.

A mineral is sometimes made up of just one chemical element but more often it is a compound (mixture) of two or more.

For example, diamond is made up of just carbon, while fluorite is made up of a compound of calcium and fluorine.

There are over 4000 different types of minerals.

Only around 30 of these are commonly found in the Earth's crust.

Examples of minerals include calcite, gypsum, feldspar, pyrite, gold, quartz and diamond.

The precious gems ruby and sapphire are varieties of the mineral corundum.



Rocks

Rocks and stones are naturally occurring solids made up of minerals.

The Earth's crust is made up of rock.

Rocks have been used by humans for millions of years, from early tools and weapons through to various construction materials.

There are three different types of rocks based on the way they form, igneous, sedimentary and metamorphic.

When magma cools and solidifies it forms igneous rock.

Examples of igneous rocks include granite, basalt, gabbro, obsidian and pumice. More igneous rock facts.

Sediment deposited over time, often as layers at the bottom of lakes and oceans, forms sedimentary rocks.

Examples of sedimentary rocks include sandstone, mudstone, flint, greywacke and chalk. More sedimentary rock facts.

Extreme pressure and heat over time forms metamorphic rocks.

Examples of metamorphic rocks include marble, quartzite, schist, granulite and slate. More metamorphic rock facts.
The metamorphic rock marble is formed from the sedimentary rock limestone.

The metamorphic rock granulite is formed from the igneous rock basalt.
You might be interested in
Explain went experiment​
Leya [2.2K]

When Went placed the agar block on one side of the decapitated shoot, the shoot curved away from the agar as it grew. This demonstrated that some kind of hormonal signal had diffused into the agar from the coleoptile tips. ... Went's experiment represented the first time that anyone had isolated a hormone from plants.

6 0
3 years ago
Read 2 more answers
What are the levels of ecology, from the smallest level to largest level?
Vadim26 [7]

Answer:

The levels, from smallest to largest, are: molecule, cell, tissue, organ, organ system, organism, population, community, ecosystem, biosphere.

Explanation:

8 0
3 years ago
What is a quadrat.<br> need help nowww!!!!
bekas [8.4K]
Each of a Number of small areas of habitat, typically of one square meter, selected at random to act as samples for assessing the local distribution of plants or animals.
4 0
3 years ago
Read 2 more answers
Is this mRNA or rna need help please need the answer in a hurry
Vlad [161]

It is mRNA because RNA, which stands for ribonucleic acid, is a polymeric molecule made up of one or more nucleotides. ... During the process known as transcription, a RNA copy of a segment of DNA, or messenger RNA (mRNA), is made. This strand of RNA can then be read by a ribosome to form a protein.

5 0
3 years ago
_______ contains the genetic instructions for making proteins.
wariber [46]
A gene contains the genetic instructions for making proteins. 
6 0
3 years ago
Other questions:
  • Which of the following is not a function of the circulatory system?
    14·1 answer
  • What are cells that express the same genes? A. similar B. different C. mutated D. not living
    10·1 answer
  • The ______ separates the somatosensory cortex from the primary motor cortex.
    5·1 answer
  • The type of muscle shown here is found only in the heart. it is
    14·2 answers
  • Which activity would contribute the most to water pollution?
    14·2 answers
  • Doug has filled a long tray with an even layer of sand. Doug then uses two bricks to prop up one side of the tray. Next, Doug us
    6·2 answers
  • Write 8 adaptative feature of bird​
    15·1 answer
  • A commensal bacterium ____________________
    11·1 answer
  • What happens when a gene is altered?
    6·1 answer
  • Scientists say that conditions must be "just right" for a hurricane to start up. Which is the first step of "just right" in the
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!