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
Molodets [167]
4 years ago
7

The continental crust is

Biology
2 answers:
7nadin3 [17]4 years ago
8 0
The continental crust is

A.composed mostly of granite
B.up to 6km thick
C.formed quickly -cooled lava
D.made of rock 2 million years old

i say the answer is D.
drek231 [11]4 years ago
8 0

Answer: Option (D)

Explanation: The continental crust is estimated to be about 2 billion years old measured by the U₂₃₈-Pb₂₀₆ dating method, whose life is about 4.5 billion years. It is comprised of about 55-60% of SiO₂ and 15-20% of AL₂O₃, and are comparatively less denser than the oceanic crust.

The density of the continental crust is about 2.85 g/cm³ and its thickness is about 35-40 km. In the mountain ranges like the Himalayas, its thickness ranges from about 40-80 km. The continental crust is created and destroyed due to the plate tectonic movement, thereby conserves the total crust of the earth.

Hence the correct answer is (D)

You might be interested in
Glucose is a form of ____________ energy
viva [34]

Answer:

Chemical Energy

Explanation:

7 0
4 years ago
A patient wants to know why adh is important in the body. what is the nurse's best response? adh is important in:
Evgesh-ka [11]
<span>Controlling your blood pressure. It is the anti-diuretic hormone that works in your kidneys and blood vessels. It keeps the kidney from releasing too much water into the urine. ADH is made in the hypothalamus of your brain and then stored in the back of the pituitary gland.</span>
5 0
3 years ago
A 2-year-old child has been diagnosed with neuroblastoma. the tumor is extremely large. parents ask how this cancer could be so
liubo4ka [24]
Early diagnosis of childhood cancer is often difficult because the signs and symptoms are SIMILAR TO THOSE OF OTHER CHILDHOOD DISEASES.
Doctors generally find it difficult to diagnosis cancer i children because the accompany symptoms for the disease is quite similar to those of other diseases that children experience. Cancer in children usually occur very rapidly and its diagnosis in most cases typically occur at the late stage.
8 0
3 years ago
How does breathing work?
prohojiy [21]
Breathing in
When you breathe in, or inhale, your diaphragm contracts and moves downward. This increases the space in your chest cavity, and your lungs expand into it. The muscles between your ribs also help enlarge the chest cavity. They contract to pull your rib cage both upward and outward when you inhale.


There bítçh
6 0
3 years ago
How many genetically different eggs could be formed by women with the following genotypes? (a). Aa bb CC DD (b). AA Bb Cc dd (c)
Masteriza [31]

Answer:

(c). Aa Bb cc Dd

Explanation:

5 0
4 years ago
Other questions:
  • When you clear water from a mask with a purge valve, you tilt your head:?
    7·1 answer
  • When does a mutation have the most impact on allele frequency?
    6·2 answers
  • What does it mean for a membrane to be selectively permeable?​
    7·1 answer
  • A plant cell differs from an animal cell in that the annual cell does not have?
    5·1 answer
  • Click to review the online content. Then answer the question(s) below, using complete sentences. Scroll down to view additional
    6·2 answers
  • John and Jane are planning a family, but since each has a brother who has sickle-cell disease, they are concerned that their chi
    13·1 answer
  • Scientists capture and tag 10 dolphins. The next day, they capture another 10 dolphins in the same area. 8 of which are already
    14·1 answer
  • Seagrasses are flowering plants which grow in the photic zones of marine environments. Which factor would be abiotic limiting fa
    14·1 answer
  • What class does kingdom protoctista belong to?
    15·2 answers
  • Contraction of atria
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!