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
faust18 [17]
2 years ago
8

18. The three most common elements in the earth's crust, in order of decreasing abundance, are a. feldspar, quartz, pyroxenes b.

silicon, oxygen, copper c. oxygen, silicon, aluminum d. iron, calcium, sodium
Geography
2 answers:
ehidna [41]2 years ago
8 0

Answer: c. Oxygen, silicon, and aluminium

Explanation:

The common elements in the Earth's crust in order of decreasing abundance are as follows:  

Oxygen: Oxygen is the most abundant element on earth's crust. It makes up 46.6%. It exists as compound of the silicate minerals. It is used for industrial, commercial and medical purposes.

Silicon: Silicon is the second most common and abundant element on the earth crust. It makes up the concentration of 27.7%. It combines with the minerals of silica to form the silicate minerals. It is used for the purpose of ceramics, cosmetics, glass and other products.

Aluminium: Aluminium is the third most common and abundant element on the earth crust. It makes up the concentration of 8.1%. The aluminum exists in the form of aluminium oxide, potassium aluminium sulfate and aluminium hydroxide. It is used for the purpose of manufacture of rockets, machinery and automobiles.

Yanka [14]2 years ago
3 0

Answer:

c. Oxygen, silicon, and aluminium

Explanation:

The common elements in the Earth's crust in order of decreasing abundance are as follows:  

Oxygen: Oxygen is the most abundant element on earth's crust. It makes up 46.6%. It exists as compound of the silicate minerals. It is used for industrial, commercial and medical purposes.

Silicon: Silicon is the second most common and abundant element on the earth crust. It makes up the concentration of 27.7%. It combines with the minerals of silica to form the silicate minerals. It is used for the purpose of ceramics, cosmetics, glass and other products.

Aluminium: Aluminium is the third most common and abundant element on the earth crust. It makes up the concentration of 8.1%. The aluminum exists in the form of aluminium oxide, potassium aluminium sulfate and aluminium hydroxide. It is used for the purpose of manufacture of rockets, machinery and automobiles.

You might be interested in
Montesquieu believed that "Branches of ___________ should have checks and balances."
Likurg_2 [28]
D Government..........
6 0
3 years ago
Aquaculture and fish farming can create environmental problems because they __________.
Mrrafil [7]
B is the correct answer
5 0
3 years ago
Read 2 more answers
Using the map of present-day oceanic plateaus and other submerged crustal fragments below, determine which feature is most likel
Alja [10]

The feature that is most likely to be accreted onto a continent is the Galapagos Rise.

4 0
3 years ago
Which best describes the very next phase in our sun's life cycle?
Maslowich

Answer:

D. it will expand and become a red giant.

Explanation:

In the main phase of any star's life, hydrogen is being fused into helium inside the core. This phase takes up 90% of the star's life span, and this is the phase the sun is at now. The next phase is where it turns into a red giant. Once the hydrogen has completely turned into helium, the inert helium ash collapses on itself. Which in turn causes the core to get denser and heat up, which also expands its size. It appears red because outer surface is a lower temperature, that makes it appear red (hence the name "Red Giant")

6 0
3 years ago
_______ are an especially good indicator of climate change because scientists can find clues about ancient organisms and their e
kvasek [131]

I believe D. plant fossils is the correct answer.

5 0
3 years ago
Read 2 more answers
Other questions:
  • Why does convection cause movement of material and energy in earths interior​
    11·1 answer
  • Is the mississippi river, the columbia river, or the rio grande closer to california?
    9·1 answer
  • Which phrases describe causes of the greenhouse effect? A.insulating atmosphere B.longer days C.solar radiation D.gases and wate
    12·2 answers
  • se dau termenii : harta , suprafata semne conventionale scara reprezentare plan paralele meridiane glob legenda faceti un text l
    12·1 answer
  • Granite is _____. found in continental crust formed from contact metamorphism a chemical sedimentary rock an extrusive igneous r
    8·2 answers
  • Major producers of Cotten include all of the following countries except
    11·1 answer
  • Which of the following languages is widely adopted and spoken in South and Southeast Asia? *
    7·1 answer
  • 6. What geographic reason explains why Russia would not have many usable harbors on
    7·1 answer
  • Houstons high temp is...... in the month of...
    7·1 answer
  • How has "globalization" increased the opportunity for the diffusion of disease?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!