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.
Define latitudes and longitudes?Write the characteristics of them.
Answer:
A geographic coordinate system is a coordinate system associated with positions on Earth. A geographic coordinate system can give positions: as spherical coordinate system using geocentric latitude,
Both longitude and latitude are angles measured with the center of the earth as an origin. A longitude is an angle from the prime merdian, measured to the east (longitudes to the west are negative). Latitudes measure an angle up from the equator (latitudes to the south are negative).
The latitudes are the parallel circles with respect to the equator reducing in length northwards and southwards and the poles are the points only. On the other hand longitudes are equal in length drawn from North Pole to South Pole with their intervals reducing towards poles
Explanation: HOPE IT HELPS...
Answer:
Explanation:
latitudes is the angular distance of a place north or south of the earth's equator, or of the equator of a celestial object, usually expressed in degrees and minutes.
Longitudes is the measurement east or west of the prime meridian.
Characteristics of longitudes is Each meridian is half of a great circle.
They run in a true north-south direction from. connecting the North and South Poles.
They are spaced farthest apart at the equator but. converges at the poles.
Meridians help us to determine standard time.
latitudes Characteristics
There are 180 parallels of latitudes apart from the Equator.
Each parallel of latitude is a circle.
Only the Equator is a Great Circle, all the rest of the latitudes are Small Circles.
how is a scale different from a scale factor?
asap help
no links
Answer:
Scale is used in geometry to make accurate reproductions of figures; they are different sizes but not proportion. Figures are similar but to scale. Scale factor is used on similar geometric figures. You can find the scale factor of corresponding angles, sides, and even diagonals.
geographically, panama is a classic example of which landform?
It should be noted that the example of landforms that Panama can be considered to be is an isthmus.
An isthmus simply refers to a narrow strip of land that is vital in connecting two larger landmasses and also separates two bodies of water.
It should be noted that the isthmus of Panama is that narrow strip of land that is between the Pacific Ocean and the Caribbean Sea. It links North and South America.
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A student keeps a record of the phases of the moon for one month. On the first night of the student’s observations, the new moon is visible in the sky. Before the next new moon, which of these phases will the student observe?
Answer:
The Waning Gibbous Moon
Explanation:
The Waning Gibbous moon is the last phase, and thus comes before the New Moon.
What is a bushfire?
Can you write that in your own words please
Bushfires are wildfires that burn through natural vegetation such as woodland, scrubland, grassland, or savannahs. These fires are difficult to control and unpredictable.
These fires are more common in locations with hot, dry weather, such as Australia, Greece, Africa, and parts of the United States, such as California.
Lung capacity increases as you get older.
true
false
Answer:
FALSE
Explanation:
Your muscles get weaker as you age
which pair of forces do scientists believe are responsible for tectonic plate motion?
Many dinosaurs fossils have been found in the UK. Bet none ane less than 65 million years old. Explain
- How does Canada compare to other developed nations, such as the United States and those in Western Europe?
- How do you account for the differences in the breakdown of sectors for countries in Southern Asia and Sub-Saharan Africa?
- Generally speaking, what trend do you see between countries that have high levels of GDP per capita and the percentages found in each of the three economic sectors?
Answer:
The United States and Canada both rank as highly developed nations, according to the Human Development Index. The United States ranks fourth on the list and Canada ranks eighth. The Human Development Index measures a country’s standard of living, life expectancy, education levels, and income.
Explanation:
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the southernmost himalayas are known as _____
Answer:
Siwalik Range
Explanation:
Southernmost range of hills in Himalayas. Near Nepalese border with India.
surface features that are created when water dissolves limestone, like sinkholes and disappearing streams, are parts of
The surface features that is been developed when limestone is been dissolved by water and disappearing streams is Karst.
Karst can be regarded as the type of landscape, and in this landscape bedrock are been dissolved which create sinkholes as well as sinking streams.It us usually associated with soluble rock types such as ;limestone
marble
gypsum
Therefore, Karst is the right term.
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Describe three differences between equatorial climate and Britain’s climate
Explanation:
In the case of temperate climates, there is a moderate amount of winter. However, there is no winter season in an equatorial climate.
In the case of tropical forests, there is a lot of rain, which isn't found in temperate climates. As a result, rainfall in equatorial climates is substantially higher.
The amount of heat received by temperate climates is smaller than that received by equatorial climates.
__________ is defined as having a single legislative chamber. A. levy B. ratified C. unicameral D. enumerated Please select the best answer from the choices provided A B C D
Answer: C. unicameral
Explanation:
because a unicameral system is a government with one legislative house or chamber.Cities grew because of all these except what ?
immigration or jobs or farming or railroads ??
Answer:
id say railroads
Explanation:
Which principle states that in a sedimentary sequence, the oldest layer lies at the bottom and the youngest layer at the top
Answer: Principle of Superposition
Explanation: In an otherwise undisturbed sequence of sedimentary strata, or rock layers, the layers on the bottom are the oldest and layers above them are younger. Principle of Original Horizontality: Layers of rocks deposited from above, such as sediments and lava flows, are originally laid down horizontally. Hope this helps!
what does the earth's magnetic field shield earth from
Answer:
the charged particles of the solar wind
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.
What European countries still own territory in Latín America?
the term used to describe temperature perception is
Answer:
thermoception is the term.
Explanation:
Thermoception or thermoreception is the sensation and perception of temperature, or more accurately, temperature differences inferred from heat flux.
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.
You were given a promotion at work which will
cause you to move. You do not want to move but
the company warns if you do not move, they will
replace you.
Push factor or Pull factor
Switzerland is made up of how many cantons? a) 4 b)26 or c) 15
Answer:
26
Explanation:
Describe the structure of the sun and name all of the layers starting from the center.
Answer: The sun has six layers. Three layers, the corona, chromosphere, and photosphere, comprise the sun's atmosphere or outer layer. The other three layers, convective zone, radiative zone, and core, comprise the inner layers, or the parts of the sun that are not seen.
Explanation:
Answer:
From the center out, the layers of the Sun are as follows: the solar interior composed of the core (which occupies the innermost quarter or so of the Sun's radius), the radiative zone, and the the convective zone, then there is the visible surface known as the photosphere, the chromosphere, and finally the outermost
Explanation:
what is examples of written communications
i really need help to some people
Answer:
I might be able to help
Explanation:
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 is the difference between a scale and a scale factor
Answer:
Scales gives the ratio of length on map drawing etcetera while a scale factor gives the difference in size between shapes on a scale.
Explanation:
Warming temperatures melt ice cover, exposing a darker surface that absorbs more solar radiation. In response, the air warms even further. This is an example of
Melting of ice due to rise in earth temperature is due to global warming.
What is global warming?Global warming is the gradual warming of the Earth's surface that has been seen since the pre-industrial era (between 1850 and 1900), and is attributed to human activity, particularly the burning of fossil fuels, which raises the levels of heat-trapping greenhouse gases in the atmosphere.
Global warming causes greenhouse effect and leads to ozone layer depletions which hamper the climate due to excessive use of carbon & its related element by means of heavy use of fuels in transportation & industrialization.
Therefore warming temperatures melts ice sheets and glacier, exposing a darker surface that absorbs more solar radiation. In response, the air warms even further.
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Why Neptune is the coldest planet
Answer:
Because it's the farthest planet away from the sun.
Explanation:
Antarctica occupies ____________ of the Earth's land area, but has no permanent population or government.
Answer:
2.75% is the answer you're looking for.
