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
Alchen [17]
2 years ago
14

What happens to air that causes high-pressure systems?

Biology
1 answer:
Step2247 [10]2 years ago
5 0
Answer: Areas of high and low pressure are caused by ascending and descending air. As air warms it ascends, leading to low pressure at the surface. As air cools it descends, leading to high pressure at the surface.

Paragraph: High and low pressure systems cause day-to-day changes in our weather. In this article, we look at how they are defined and how they form.

What do we mean by 'pressure'?

The Earth's atmosphere exerts pressure on the surface. Pressure is measured in hectoPascals (hPa), also called millibars. Standard pressure at sea level is defined as 1013hPa, but we can see large areas of either high or low pressure. These areas are all relative to each other, so what defines a high will change depending on the area around it.

Weather chart

On a weather chart, lines joining places with equal sea-level pressures are called isobars. Charts showing isobars are useful because they identify features such as anticyclones (areas of high pressure) and depressions (areas of low pressure).

Ascending and descending air

Areas of high and low pressure are caused by ascending and descending air. As air warms it ascends, leading to low pressure at the surface. As air cools it descends, leading to high pressure at the surface.

In general, low pressure leads to unsettled weather conditions and high pressure leads to settled weather conditions.

Anticyclone (high pressure)

In an anticyclone (high pressure) the winds tend to be light and blow in a clockwise direction (in the northern hemisphere). Also, the air is descending, which reduces the formation of cloud and leads to light winds and settled weather conditions.

Depression (low pressure)

In a depression (low pressure), air is rising and blows in an anticlockwise direction around the low (in the northern hemisphere). As it rises and cools, water vapour condenses to form clouds and perhaps precipitation. This is why the weather in a depression is often unsettled, there are usually weather fronts associated with depressions.

Facts about air: The atmosphere of Earth, commonly known as air, is the layer of gases retained by Earth's gravity that surrounds the planet and forms its planetary atmosphere.
You might be interested in
What was the protein that was found in mouse urine that might inhibit blood vessel growth in people? *
Aleks [24]

Answer: Angiogenisis

Explanation:

3 0
2 years ago
....What is NET ZERO
topjm [15]

Answer: It’s like decreasing green house gasses to zero

Explanation:

4 0
2 years ago
Read 2 more answers
What will happen if external factors affect cell division in a group of cells placed in a culture dish? A) Anchorage dependence
irakobra [83]

Answer:

option B is correct

Explanation:

the effect of external physical factor on cell division is clearly seen on in density dependent inhibition( a phenomenon in which crowded cell  stop dividing)

6 0
3 years ago
Which particular part of the brainstem would you miss if you were in a dust storm if you couldn't sneeze?
SVEN [57.7K]
Medulla oblongata is the part of the brainstem that controls the autonomic functions such as sneezing, coughing, digestion and etc.
6 0
3 years ago
Read 2 more answers
How the chlorophyll helps the reacrion a happen?​
USPshnik [31]
Both photosystems contain many pigments that help collect light energy, as well as a special pair of chlorophyll molecules in the heart (reaction center) of the photosystem. The special pair of photosystem I is called P700, while that of photosystem II is called P680.
5 0
2 years ago
Other questions:
  • I need help fast!!
    12·2 answers
  • Precipitation that enters a watershed and is not absorbed into the soil is called _______.
    8·1 answer
  • The flu vaccine activates adaptive immunity. How does this occur?
    15·2 answers
  • Which of the following is considered by most biologists to be the most accurate in supporting the theory of evolution?
    13·1 answer
  • The phytoplankton at the bottom of the pyramid take in and store a certain amount of the Sun's energy. Does all of the energy st
    13·1 answer
  • scientists cite evidence that earths climate has been changing significantly over the past 50 years. They also argue that change
    7·1 answer
  • What is the result of a mutation during meiosis
    7·2 answers
  • What are 5 producers in the ocean?​
    6·1 answer
  • Pseudoscience is more likely to be driven by ALL of the following factors EXCEPT?
    13·1 answer
  • This skeleton belongs to americon museum of natural history.find out the name of the animals to which this skeleton lelongs.does
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!