Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
45 Cards in this Set
- Front
- Back
|
Air is a mixture of what?
|
Nitrogen
Oxygen Water vapor Other gases |
|
|
Two reasons why the atmosphere is vital to living things
|
It supports life
It protects life |
|
|
What all living organisms need to live on earth
|
Air (oxygen)
|
|
|
Living things take in oxygen for ______________, or breathing
|
Respiration
|
|
|
Besides breathing in oxygen, why else is oxygen necessary in a living organism?
|
It helps break down food so energy can be obtained
|
|
|
Living things take in oxygen, and they give off ____________.
|
Waste and carbon dioxide
|
|
|
What happens to the carbon dioxide when in the atmosphere?
|
Plants and producers that contain chlorophyll absorbs it
|
|
|
What is chlorophyll ?
|
A green substance found in plants that take in CO2 and make food for the plant
|
|
|
What is photosynthesis ?
|
The process of using light to make food and give off oxygen
|
|
|
Producers put _______________back into the atmosphere.
|
Oxygen
|
|
|
What is a renewable resource ?
|
A resource that can be replaced in a short period of time (human lifetime).
|
|
|
Oxygen is an example of what type of resource?
|
Renewable
|
|
|
The atmosphere can act like a _______________ _______ as it it doesn't allow harmful energy from sun to penetrate.
|
Protective shield
|
|
|
Harmful rays from the sun are called _____________ __________.
|
UV or ultraviolet rays
|
|
|
The layer 18 miles above us that screens out 95-99% of the UV rays.
|
Ozone Layer
|
|
|
The atmosphere shields the earth from extreme ____________ and from ________ too.
|
Temps (hot and cold) and rocks
|
|
|
What actually are "shooting stars"?
|
Rocks from space burning up
|
|
|
How are clouds helpful?
|
Block sunlight in the day
Keep heat from escaping during the night |
|
|
The % of the air that is made up of nitrogen?
|
78%
|
|
|
How does nitrogen get into our foods?
|
Bacteria take it from the air and is found in the soil. Plants absorb the nitrogen from soil to make proteins.
|
|
|
When living things die, _______________ is returned to the soil.
|
Nitrogen
|
|
|
How are fossil fuels formed?
|
Formed from the decay of ancient forms of life
|
|
|
What are nonrenewable resources?
|
They cannot be replaced in our lifetime.
|
|
|
Examples of nonrenewable resources.
|
Coal
Oil Natural gas |
|
|
List things that burn fossil fuels
|
Cars, planes, buses, trains, homes, and factories
|
|
|
Natural events that cause air pollution
|
Volcanoes and fires
|
|
|
What is smog?
|
A mix of smoke and fog that is moist and calm
|
|
|
Why is smog more commonly noticed in big coastal cities?
|
There is more moisture by the water and more burning of fuels in the city.
|
|
|
Smog can make people very __________.
|
Sick
|
|
|
Destructive enough to destroy forests, kill animals and plants, and eat away at buildings?
|
Acid rain
|
|
|
Moisture that has acids in it
|
Acid rain
|
|
|
The law that Congress passes to protect the air
|
Congress Air Act 1967
|
|
|
True or false: vehicles release more harmful wastes today than they did years ago?
|
False
|
|
|
What must be washed off of coal before burning?
|
Sulfur
|
|
|
The year the first Earth Day was celebrated?
|
1970
|
|
|
What does the EPA do?
|
Checks to be certain that people and companies are following the laws.
|
|
|
What does EPA stand for?
|
Environmental protection agency
|
|
|
How did holes in the ozone appear?
|
Due to CFC's that are released in the atmosphere. CFC's were found in fridges and sere sol cans
|
|
|
When were CFC's banned?
|
1990
|
|
|
What can we do to protect earth?
|
Reduce, reuse, recycle,
Ride bike more and cars less Follow the clean air laws Plant trees |
|
|
How to keep water on earth clean
|
Monitor out watersheds
|
|
|
What is a watershed?
|
An area of land that drains into a single river
|
|
|
Where are watersheds found?
|
Near mountains
|
|
|
Number of watersheds in US?
|
18 major ones
|
|
|
The biggest watershed
|
The Mississippi a Watershed
|
