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35 Cards in this Set
- Front
- Back
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What is the Atmosphere? |
A series of protective layers that keeps the air inside of the Earth |
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What does the atmosphere protect us from? |
Sun's harmful Ultra Violet rays |
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What does the Atmosphere destroy? |
Meteoroids |
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What is the Atmosphere responsible for? |
Keeping the water on Earth from evaporating |
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What in the Atmosphere is responsible for supporting life? |
Oxygen (which is contained in the TROPOSPHERE)
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How thick is the Atmosphere? |
Over 1000km thick
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Where is MOST of the gas in the atmosphere?
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Stratosphere |
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What happens to the number of gas molecules as you get further from the Earth? |
They become scarcer (lessen) |
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What type of mixture is FRESH AIR? |
Fresh air is a homogenous mixture of nitrogen and oxygen.
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What are the two main gasses in the atmosphere? |
Nitrogen (n2) and Oxygen (o2) |
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What gases are found in smaller quantities in the Atmosphere? |
Water vapor (H2O) and Carbon Dioxide (CO2) |
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What type of mixture is POLLUTED AIR? |
Heterogeneous mixture of suspended solid particles |
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List the layers of the Atmosphere. |
Troposphere, Stratosphere, Mesosphere, Thermosphere |
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What happens to the temperature in each layer of the Atmosphere? |
Troposphere = temperature lowers Stratosphere = temperature rises Mesosphere = temperature lowers Thermosphere = temperature rises |
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List characteristics of the Troposhphere |
Varies in thickness Thickest in Equatorial regions Contains 80% of all air in the Atmosphere. |
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List characteristics of the Stratosphere |
40km thick Located above the Troposhphere Contains OZONE layer less friction |
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List characteristics of the Mesosphere |
40km thick varies widely in temperature Protects earth from Meteoroids Air molecules are scarce |
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List characteristics of the Thermosphere |
Last layer of atmosphere Thickest layer: measures over 90km Sun's rays exceed 1000 degrees C. Ionosphere is found here Protects Earth from Meteoroids Site of the Magnificent phenoenon Polar Auroras |
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What is the cause of the Hole in the Ozone Layer? |
ChloroFluoroCarbons a.k.a. CFC's |
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What causes CFC's? |
Refrigeration equipment (refrigerators and Air Conditioners) |
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What are the effects of CFC's? |
Thinning of the Ozone layer resulting in possible increase of skin cancer and cataracts. |
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What does pollution do to the levels of Ozone and what does that mean for our health? |
Ozone increases at low altitudes because of POLLUTION. This irritates the mucous membranes which can cause serious health problems. |
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What did NEWTON discover? |
That there is an invisible force that pulls us to the center of the Earth: Gravity |
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What is the Universal Law of Gravity? |
Newton's law of universal gravitation states that a particle attracts every other particle in the universe using a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. |
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What is the definition of WEIGHT? |
The gravitaional force of attraction that the Earth exerts on a body. |
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What is the definition of MASS |
Mass is the quantity of matter contained in a body. |
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Does Mass or Weight change when you are on the moon? Explain |
Your mass will not change because the amount of matter in the body stays the same. But your weight will change because there is less gravitational force pulling you down to the moon. |
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What does gravity change with? |
Gravitation Force changes with the MASS and RADIUS of a planet. |
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True or False: The LARGER the planet, the greater the force of gravity. |
True. The larger the planet the greater the gravitational force. |
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What are the RESULTS of gravity? |
Keeps Earth in orbit around the Sun Keeps your feet on the ground Assembles the Stars into Galaxies |
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Name the 4 forces acting on a glider |
Drag, Lift, Thrust and Weight |
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Define DRAG |
Air Resistance, resists forward motion |
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Define LIFT |
Perpendicular to the flow of the air: UPWARDS |
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Define THRUST |
Acceleration in a particular direction: FORWARD |
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Define WEIGHT |
Must overcome the weight of the glider due to gravity: DOWNWARD |
