weather and atmosphere
TRANSCRIPT
Weather and the Weather and the AtmosphereAtmosphere
Important FactsImportant Facts
Earth’s atmosphere is Earth’s atmosphere is the thin layer of the thin layer of gasesgases that surrounds Earth. that surrounds Earth.
Dry air is 78% Dry air is 78% nitrogen nitrogen and 21% and 21% oxygen.oxygen.
Factories produce Factories produce lessless air pollution than air pollution than motor vehicles.motor vehicles.
More FactsMore Facts
Burning fossil fuels Burning fossil fuels causes causes more more pollution pollution than soil erosion, dust than soil erosion, dust storms, and forest fires storms, and forest fires together.together.
Nitrogen oxides react with Nitrogen oxides react with other air pollutants in the other air pollutants in the presence of sunlight to presence of sunlight to form form photochemical photochemical smog.smog.
As altitude decreases, As altitude decreases, the density of the air the density of the air increasesincreases..
Facts ContinuedFacts Continued
As air pressure As air pressure increases, the column increases, the column of mercury in a of mercury in a barometer barometer rises.rises.
People live in the People live in the tropospheretroposphere, or inner , or inner layer of the layer of the atmosphere.atmosphere.
The lowest The lowest temperatures in the temperatures in the atmosphere are found atmosphere are found in the in the mesosphere.mesosphere.
Let’s See If You Were Let’s See If You Were Paying AttentionPaying Attention
The two most abundant gases in The two most abundant gases in the atmosphere arethe atmosphere are
A. carbon dioxide and oxygenA. carbon dioxide and oxygen B. carbon dioxide and nitrogenB. carbon dioxide and nitrogen C. nitrogen and oxygenC. nitrogen and oxygen D. nitrogen and hydrogenD. nitrogen and hydrogen
The Answer isThe Answer is CC
When climbing a high mountain, you When climbing a high mountain, you get out of breath easily becauseget out of breath easily because
A. the percentage of oxygen in the air A. the percentage of oxygen in the air decreasesdecreases
B. the air is more denseB. the air is more dense C. there is less oxygen in each cubic C. there is less oxygen in each cubic
meter of airmeter of air D. air pressure is greaterD. air pressure is greater The Answer is The Answer is CC
Instruments used to measure air Instruments used to measure air pressure are calledpressure are called
A. ThermometersA. Thermometers B. HygrometersB. Hygrometers C. HydrometersC. Hydrometers D. BarometersD. Barometers
The Answer isThe Answer is DD
The layer in our atmosphere in The layer in our atmosphere in which weather occurs is thewhich weather occurs is the
A. troposphereA. troposphere B. stratosphereB. stratosphere C. mesosphereC. mesosphere D. exosphereD. exosphere
The Answer isThe Answer is AA
The atmosphere isThe atmosphere is
A. the layer in which weather occursA. the layer in which weather occurs B. the layer that contains the ozone layerB. the layer that contains the ozone layer C. the layer of water in the oceansC. the layer of water in the oceans D. the layer of gases that surrounds EarthD. the layer of gases that surrounds Earth
The Answer isThe Answer is DD
The human activity that causes the The human activity that causes the most air pollution is the burning of most air pollution is the burning of
__________________
The Answer isThe Answer is Fossil fuelsFossil fuels
Let’s Keep Learning!Let’s Keep Learning!
Earth’s atmosphere is important Earth’s atmosphere is important because…because…
it provides it provides all the gases needed for living all the gases needed for living thingsthings
traps energy from the sun, which traps energy from the sun, which allows allows water to exist as a liquidwater to exist as a liquid
. .
Air in the atmosphereAir in the atmosphere
has pressure because has pressure because air has massair has mass
contains particlescontains particles
From Earth to space, the main From Earth to space, the main layers in our atmosphere are:layers in our atmosphere are:
Troposphere
Stratosphere
Mesosphere
Thermosphere
Acid Rain and the OzoneAcid Rain and the Ozone
Acid rain Acid rain forms whenforms when water water combines with combines with sulfur oxidessulfur oxides
The ozone layer in the stratosphere absorbs The ozone layer in the stratosphere absorbs ultraviolet radiationultraviolet radiation
Aneroid versus Mercury BarometerAneroid versus Mercury Barometer
An aneroid barometer is different from a An aneroid barometer is different from a mercury barometer in that it mercury barometer in that it does not does not contain a liquidcontain a liquid
Let’s Test Our Let’s Test Our KnowledgeKnowledge
Ozone isOzone is A. a form of oxygen with three oxygen atoms in A. a form of oxygen with three oxygen atoms in
each moleculeeach molecule B. a form of nitrogen with three oxygen atoms in B. a form of nitrogen with three oxygen atoms in
each moleculeeach molecule C. a form of oxygen with two oxygen atoms in C. a form of oxygen with two oxygen atoms in
each moleculeeach molecule D. A form of nitrogen with two oxygen atoms in D. A form of nitrogen with two oxygen atoms in
each moleculeeach molecule
The Answer isThe Answer is AA
Water vapor is water in the form ofWater vapor is water in the form of
A. steamA. steam B. crystalsB. crystals C. a gasC. a gas D. dropletsD. droplets
The Answer isThe Answer is CC
Smoke is dark in color because it Smoke is dark in color because it consists mainly ofconsists mainly of
A. carbon dioxideA. carbon dioxide B. dustB. dust C. water vaporC. water vapor D. carbonD. carbon
The Answer isThe Answer is DD
Density can be determined usingDensity can be determined using
A. density = mass/volumeA. density = mass/volume B. density = volume/massB. density = volume/mass C. density = mass * volumeC. density = mass * volume D. density = mass + volumeD. density = mass + volume
The Answer isThe Answer is AA
The condition of Earth’s The condition of Earth’s atmosphere at a particular time and atmosphere at a particular time and
place is known as __________place is known as __________
The Answer isThe Answer is weatherweather
The atmospheric gas called The atmospheric gas called _______ forms clouds when it _______ forms clouds when it
condenses.condenses.
The Answer isThe Answer is Water vaporWater vapor
Acid rain can form when _______ Acid rain can form when _______ in the air mixes with sulfur oxides to in the air mixes with sulfur oxides to
form sulfuric acid.form sulfuric acid.
The Answer isThe Answer is WaterWater
A(n) ________ barometer A(n) ________ barometer measures air pressure by using a measures air pressure by using a metal chamber that is sensitive to metal chamber that is sensitive to
pressure changes.pressure changes.
The Answer isThe Answer is AneroidAneroid
Great Job!Great Job!
ResourcesResources
Clip Art (Microsoft PowerPoint 2003)Clip Art (Microsoft PowerPoint 2003) Images and effectsImages and effects
Science Explorer Weather and Climate Science Explorer Weather and Climate (Prentice Hall science explorer). (Prentice Hall science explorer). (2000).(2000). Upper Saddle River, New Jersey: Pearson Upper Saddle River, New Jersey: Pearson Prentice Hall. Prentice Hall.