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Terms in this set (35)
the condition of the Earth's atmosphere at a particular time and place
the envelope of gases that surrounds the planet.
Composition of the Atmosphere
Earths atmosphere is made up of nitrogen, oxygen, carbon dioxied, water vapor, and many other gases, as well as particles of liquids and solids
most abundant gas in our atmosphere (3/4 of the air we breath), each nitrogen molecule has two nitrogen atoms.
second most abundant (less than 1/4 of the atmosphere), however it is one of the most important ones
a form of oxygen with three oxygen atoms, while the usual has two
carbon dioxied molecules have one carbon atom and two oxygen atoms. it is essential to life, plants need it to produce food.
oxygen+nitrogen= 99% of out atmosphere
argon+carbon dioxied= most of the remaining one percent
rest of the gases are called TRACE GASES, because there is only small present amounts.
water in the form of gas, it happens in the water cycle and everyday life when the water condensates.
Earths atmosphere makes conditions on earth suitable for living things
a form of energy that can move through the vacuum of space
the direct transfer of energy by electromagnetic waves
Suns light on Earth
most of the energy from the sun travels to earth in the form of visible light and infrared radiation. a small amount arrives in ultraviolet radiation.
it is a form of electromagnetic energy.
an invisible form of energy with wavelengths that are shorter than violet light.
Some sunlight is absorbed or reflected by the atmosphere before it can reach the surface. The rest passes through the atmosphere to the surface
dust particles and gases in the atmosphere reflecting sunlight back into space
the process by which gases hold heat in the air
properties of air
because air has mass it also has other properties, including density and pressure
the amount of mass in a given volume of air
density= mass divided by volume
the force pressing down on an area or surface
the result of the weight of a column of air pushing down on an area.
an instrument that is used to measure air pressure
consists of a glass tube open at the bottom end and partially filled with mercury
has an airtight metal chamber without any liquids.
the distance above sea level
the horizontal movement of air from an area of high pressure to an area of lower pressure, wind is caused by the differences in air pressure
the tool that measures wind speed
the increased cooling a wind can cause
winds that are blown over short distances they are caused by the un-even heating of Earths surface within a small area
a local wind that blows from an ocean or lake
the flow of air from land to a body of water. land cools more quickly than water so the air over the land becomes cooler than the air over the water.
winds that blow steadily from specific directions over long distances, like local winds they are created by the unequal heating of earths surface, but unlike local winds the occur over a large area
The way the Earths rotation makes wind curve is called the Coriolis Effect. In the Northern Hemisphere the winds gradually turn to the right, winds blowing to the south gradually turns south west
about 10 kilometers above Earth's surface are bands of high-speed winds, generally blow from west to east at 20 to 400 km per hour
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