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
astra-53 [7]
4 years ago
7

Convection in the upper mantle

Biology
2 answers:
xz_007 [3.2K]4 years ago
8 0

Answer:

D) movement of the tectonic plates.

Explanation:

Lets understand first what convection is. It refers to the process through which denser material sinks and less dense material rises. This is because less dense material is more buoyant than denser one.

The earth is composed of water, rocks and air and all these things lower their density when there occurs an increase in their temperature.

So what happens when convection occurs in the upper mantle of earth, it raises the less dense material called magma  in uprising direction, because of the extreme heat in the Earth’s core. When molten lava moves upwards it moves in a fashion of convection, but then it cools down and sinks again.

As the earth surface is made up of tectonic plates. Scientists believe that when convection occur in mantle layer, it causes the movement of plates, This movement can be away from, or towards each other. The movement of tectonic plates causes shifts continents, ocean basins, earthquakes and pushes up mountains.


So D is best option.

Hope it helps!



Alex4 years ago
3 0

Answer:

movement of the tectonic plates.

Explanation:

I TOOK THE TEST ,.

You might be interested in
What two items are the products of photosynthesis?
o-na [289]

Answer:

Summary. The photosynthesis chemical equation states that the reactants (carbon dioxide, water and sunlight), yield two products, glucose and oxygen gas. The single chemical equation represents the overall process of photosynthesis.

8 0
3 years ago
When a client with a history of asthma takes a walk outside on a windy day with high pollen counts, she may experience an asthma
Nina [5.8K]

Answer:

Option C, Parasympathetic nervous system stimulation resulting in airway constriction

Explanation:

Complete Question

When a client with a history of asthma takes a walk outside on a windy day with high pollen counts, she may experience an asthma attack, resulting in an increase in respiration rate and wheezing. The body's response is likely related to which pathophysiological principle?

Select one:

a. Influx of macrophages to wall of the pollen, thereby stopping the attack

b. Release of catecholamines causing blood vessel constriction

c. Parasympathetic nervous system stimulation resulting in airway constriction

d. Inhibition of glandular secretions, which causes build up of mucus in the lungs

Solution

The parasympathetic nervous system consists of cranial and sacral spinal nerves. It is responsible for doing the work of sympathetic system thereby decreasing the rate of respiration and heart. During windy climate when pollen grains are in excess, the rate of respiration needs to be higher in order to get sufficient supply of oxygen. But due to activation of parasympathetic nervous system the body tries to preserve its energy by decreasing the rate of various bodily functions and  

Hence, option C is correct

3 0
3 years ago
Accumulation of _____________ fat is considered to enhance health risk, perhaps due to increases in blood _____________ and beca
scoray [572]
The answer is d.visceral,pressure
8 0
3 years ago
Describe the atp/adp cycle. why is atp useful as our basic energy source?
Step2247 [10]
In the ATP cycle, a phosphate group is cut off of ATP to form ADP, absorbing energy. ATP to form ADP, releasing energy. ADP to form ATP, absorbing energy. ADP to form ATP, releasing energy.
3 0
4 years ago
SOMEONE PLZ HELP!!!!!!!!
aivan3 [116]
A - Endoplasmic Reticulum.
8 0
3 years ago
Other questions:
  • Ajutațimă va rog la acest exercițiu: Realizează un poster în care să prezinți schema arcului reflex al reflexelor examinate în l
    14·1 answer
  • Approximately 80% of a muscle fiber's volume are the myofibrils. this characteristic reflects muscles ability to ________.
    6·2 answers
  • Frog lungs are poorly developed. How does this relate to their skin being thin and moist?
    8·1 answer
  • Fast twitch muscle fibers are better than slow twitch fibers for short iterations of energy such as sprinting or jumping. This i
    10·1 answer
  • The ability of an organism to maintain internal conditions is called _____.
    13·1 answer
  • Where does chemiosmosis occur?
    15·1 answer
  • Scientists use tools to
    10·1 answer
  • Which cells produce androgens such as testosterone?
    5·1 answer
  • Why are horses and donkeys considered the same species even though they can produce offspring
    12·1 answer
  • Spinocerebellar tract axons carry sensory information into the cerebellum by the ________________
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!