Answer: It is the weight of air molecules pressing down on the earth.
Explanation: Without air, then their would be no living creatures roaming around on earth.
The air around you has weight, and it presses against everything it touches. That pressure is called atmospheric pressure, or air pressure. It is the force exerted on a surface by the air above it as gravity pulls it to Earth.
Atmospheric pressure is commonly measured with a barometer. In a barometer, a column of mercury in a glass tube rises or falls as the weight of the atmosphere changes. Meteorologists describe the atmospheric pressure by how high the mercury rises.
An atmosphere (atm) is a unit of measurement equal to the average air pressure at sea level at a temperature of 15 degrees Celsius (59 degrees Fahrenheit). One atmosphere is 1,013 millibars, or 760 millimeters (29.92 inches) of mercury.
Atmospheric pressure drops as altitude increases. The atmospheric pressure on Denali, Alaska, is about half that of Honolulu, Hawai'i. Honolulu is a city at sea level. Denali, also known as Mount McKinley, is the highest peak in North America.
As the pressure decreases, the amount of oxygen available to breathe also decreases. At very high altitudes, atmospheric pressure and available oxygen get so low that people can become sick and even die.
Mountain climbers use bottled oxygen when they ascend very high peaks. They also take time to get used to the altitude because quickly moving from higher pressure to lower pressure can cause decompression sickness. Decompression sickness, also called "the bends", is also a problem for scuba divers who come to the surface too quickly.
Aircraft create artificial pressure in the cabin so passengers remain comfortable while flying.
Atmospheric pressure is an indicator of weather. When a low-pressure system moves into an area, it usually leads to cloudiness, wind, and precipitation. High-pressure systems usually lead to fair, calm weather.
Vocabulary
Term Part of Speech Definition
air
noun
layer of gases surrounding Earth.
aircraft
noun
vehicle able to travel and operate above the ground.
air pressure
noun
force pressed on an object by air or atmosphere.
altitude
noun
the distance above sea level.
atmosphere (atm)
noun
(atm) unit of measurement equal to air pressure at sea level, about 14.7 pounds per square inch. Also called standard atmospheric pressure.
atmospheric pressure
noun
force per unit area exerted by the mass of the atmosphere as gravity pulls it to Earth.
barometer
noun
an instrument that measures atmospheric pressure.
Celsius scale
noun
scale for measuring surface temperature, used by most of the world, in which the boiling point of water is 100 degrees.
cloud
noun
visible mass of tiny water droplets or ice crystals in Earth's atmosphere.
decompression sickness
noun
serious condition resulting from gases forming tiny bubbles in the bloodstream as a body adjusts to a major change in atmospheric pressure. Also known as DCS, divers disease, and the bends.
exert
verb
to force or pressure.
Fahrenheit scale
noun
scale for measuring surface temperature used by Belize, Liberia, Myanmar, and the United States.
force
noun
power or energy that activates movement.
gravity
noun
physical force by which objects attract, or pull toward, each other.
high-pressure system
noun
weather pattern characterized by high air pressure, usually as a result of cooling. High-pressure systems are usually associated with clear weather.
low-pressure system
noun
weather pattern characterized by low air pressure, usually as a result of warming. Low-pressure systems are often associated with storms.
mercury
noun
chemical element with the symbol Hg.
mercury barometer
noun
tool that determines atmospheric pressure by measuring how much mercury moves in a glass tube.
meteorologist
noun
person who studies patterns and changes in Earth's atmosphere.
millibar
noun
(mbar) unit of pressure equal to .001 bar of atmospheric pressure.
oxygen
noun
chemical element with the symbol O, whose gas form is 21% of the Earth's atmosphere.
precipitation
noun
all forms in which water falls to Earth from the atmosphere.
scuba
noun, adjective
(self-contained underwater breathing apparatus) portable device for breathing underwater.
sea level
noun
base level for measuring elevations. Sea level is determined by measurements taken over a 19-year cycle.
weather
noun
state of the atmosphere, including temperature, atmospheric pressure, wind, humidity, precipitation, and cloudiness.
wind
noun
movement of air (from a high pressure zone to a low pressure zone) caused by the uneven heating of the Earth by the sun.
How do archaeological finds suggest when people first came to North america?
Answer:
Whereas archaeologists once thought that the earliest arrivals wandered into the continent through a gap in the ice age glaciers covering Canada, most researchers today think the first inhabitants came by sea.
Explanation:
hope this helps
Answer:
Whereas archaeologists once thought that the earliest arrivals wandered into the continent through a gap in the ice age glaciers covering Canada, most researchers today think the first inhabitants came by sea.
Explanation:
how long does it take for sunlight to travel from the surface of the sun to the earth
Answer:
It takes 8.3 minutes for light to travel from the Sun to the Earth.
Which continent needs anti-natal policies, but struggles with the means to effectively implement them?A) AsiaB) EuropeC) AfricaD) North America
Answer:
Anti-natalist policies are prevalent in Asian countries, such as China and Singapore. China and Singapore adopted anti-natalist policies in … the policies included those shown below. This means that, due to the countries socio-economic situation, they need an increase in the birth rate.Dis 2, 2020
Explanation:
pa brainlest
What do the Mississippi and Amazon river have in common?
Answer:
Both are facing increasing pollution.
Both are experiencing a loss of biodiversity.
Explanation:
the separation of populations by barriers such as rivers, mountains, or bodies of water is called
Answer:Socioeconomic status. More than 90% of road traffic deaths occur in low- and middle-income countries. Road traffic injury death rates are highest in the African region. Even within high-income countries, people from lower socioeconomic backgrounds are more likely to be involved in road traffic crashes.
Explanation:
What lies underneath volcanic features at earth's surface?.
Answer:What lies underneath volcanic features at Earth's surface? magma chambers and volcanic conduits.
Explanation:
Why is the united states no.1 on the list of most influential countries? (please give me a proper answer)
Answer:
The 2021 Most Influential Countries Ranking is inspired by a perception-based global survey, and countries are ranked by top scores among more than 10,000 informed elites in the world. synthesizes five attributes of a nation: leader, connections with the rest of the world, influential culture, political influence, and strong international alliances.
I NEED HELP RIGHT NOWW! What issues are on the United Nations agenda for sustainable development for 2015?
Answer:
to find new ways to improve the lives of the world's people, to eradicate poverty, to promote prosperity and well-being for all,
Explanation:
The goal of the plan: to find new ways to improve the lives of the world's people, to eradicate poverty, to promote prosperity and well-being for all, to protect the environment, and to fight against climate change.
What natural resources does mars have?
Which of the following statements about erosion is true? a. Erosion occurs as a result of drastic changes in temperature. B. Erosion occurs when wind or water moves over sediment, soil, or rocks. C. Physical and chemical are the two types of erosion. D. Movement is not required for erosion to take place. Please select the best answer from the choices provided A B C D.
Answer: C
Explanation:
Answer:
c
Explanation:
Is this true or false? (50 pts)
Gerrymandering is legal in all 50 states because it divides states into equal districts.
Answer:
false
Explanation:
Answer:
thanks u true thats true
Explanation:
pls make me brain list
the sun is a star but the earth is a planet why
Answer:
cause the sun generates heat + light and the earth doesn't
this question is like "why am i a human and that dog is a dog?" duh, because that's what it is
VERY URGENT QUESTION. PLEASE ANSWER QUICKLYWhich of the following is correct about using a mapping software and making maps on computer?(2 Points)a) it’s a skill in geographyb) it belongs to physical geographyc) it belongs to human geographyd) it belongs to environmental geography
Answer:
human geography
Explanation:
Please help me with number 4 please I really need help
Answer:
I need the question
Explanation:
Can't find the question
How does manufacturing affect economic development?
what are 5 dangers in Kentucky and Florida
Answer:
The proper terminology is actually "rip currents," but whatever you call them, they are among the most dangerous things in Florida. 5. Heat ...
Answer:
5 dangers both Kentucky and Florida share are wildlife attacks, floods, extreme heat, tornadoes, and power outages. Tropical storms as well!
Explanation:
Hope this helps! BH
what type of front causes fast moving thunderstorms and severe weather?
Answer:
cold fonts is the answer check
a plate boundary where two plates move away from each other
Answer:
Divergent (or Spreading)Explanation:
Divergent boundaries are areas where plates move away from each other.
Answer:
DevergentExplanation:
devergent areas are a plate boundary where two plates move away from each other.
What are the two types of democracy?
A)Oligarchy & Monarchy
B)Parliamentary and Presidential
C)Presidential and Monarchy
D)Monarchy and Dictatorship
Answer:
B) Parliamentary and Presidential
Explanation:
Presidential democracy and Parliamentary Democracy. Hope this helps!
Answer:
B
Explanation:
A Monarchy is like a King or Queen, this is not a form of democracy.
A Oligarchy is a group of people running the country, this is not a form of democracy.
A Dictator is one person who has control over a country.
The one that makes the most sense is B. Parliamentary and Presidential
Haiti's 2010 earthquake resulted in over 230,000 deaths whereas Japan's 2011 earthquake resulted in 20,000 deaths. What explains the differences in loss of life
India instituted the "one child policy," program that included incentives and penalties to assure that a couple only produced one child
Answer:
one child policy is correct
What is the capital of Saudi Arabia?
The capital of the oil producing nation of Saudi Arabia is the rich city of Riyadh.
Saudi Arabia is:
A very rich and popular country Located in the Middle East.They have several cities that are quite popular for being important in the Muslim religion such as Mecca and Medina.
Regardless of the popularity of these cities however, the administrative capital of Saudi Arabia is Riyadh.
In conclusion, the answer is Riyadh.
Find out more about Saudi Arabia at https://brainly.com/question/8513216.
Which of the following is an example of forced migration happening because of environmental changes to the current landscape?
tbh if i can get the answer to the migration unit test in unit 4 lesson 8 that would be clutch
Answer:
a migration is when someone moves from one place to another kinda like there been forced except they are desire to leave.
Many settlers traveled west in covered wagons.TrueFalse
Answer:
the answer is false
Explanation:
plz mark this as brainlists
ur welcome
What percentage of the day would you expect to have sunlight at the equator in January? In June?
Answer:
85% of the day
How to find first earthquake aftershock on seismogram.
Answer:
The P wave is designated the primary preliminary wave because it is the first to arrive at a seismic station after an earthquake.
which ocean is home to the tiny archipelago nation of comoros?
Answer:
The Indian Ocean
Explanation:
Match the terms with their description/definition
Which nations produce more of the world's pollution?
LDCS
MDCs
Answer:
The answer is MDCs
Explanation:
MDCs produce more of the world's pollution than LDCs
From the locations of past coastlines and possible future coastlines, what conclusion can be made about how sea level is tied to glacial growth
The sea level is tied to glacial growth as a result of the changes that occur.
The glacial growth brings about a decrease in sea level.
Glacial growth occurs when water is evaporated and forms ice which is the
sold state of water as a result of the low temperature in the environment.
The ice formed brings about a decrease in sea level.
However, when the ice melts it leads to an increase in the sea level as the
liquid water formed from the ice which flows into the water bodies thereby
bringing about an increase.
Read more on https://brainly.com/question/25584617