Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Didn't know it?
click below
Knew it?
click below
Don't know
Remaining cards (0)
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Science ecology

what is population A group of organisms that are all the same species in the same area.
two things that increases a population organisms born and good weather.
two things that decreases a population die of age and predators
are humans and dogs part of the same population why or why not no. because their two different species in the same area.
list the three limiting factors physical, competition, geographic
physical sometimes other environments are just to bad to live in. they may not be too hot, too cold, and or dangerous.
competition you might have a great place to live but there may be other organisms competing for your food.
geographic if your a mouse living in a valley and there are mountains in every direction, are you going to leave your area? probably not. you live a good life and might die if you tried to get over the mountains. an ocean might be another geographic limitation.
what is an ecosystem a complex set of relationships among the living resources, habitats, and residents of an area.
what do ecosystems include plants, animals, trees, fish, birds, micro-organisms, water. soil, and people.
what happens if one part of an ecosystem is damaged or destroyed it would have an impact on everything else.
what do all living things need and why they need energy.. everything we do uses energy, so they can survive.
where do animals and plants get energy animals get energy by eating things and plant get it from the sun, water and nutrients. called photosynthesis.
what do links (arrows) in a food chain represents The arrows represents what organism eats what
people are called what because they eat meat and vegetables Omnivors
what are animals called only eat meat carnivores
what are animals called only eat plants herbivores
what are animals called that break down dead matter decomposers
nearly all the what that drives ecosystems ultimately comes from the what. solar energy is an what factor, by the way, enters the ecosystem through the process of photosynthesis. energy. sun, abiotic
why are plants called producers? what are other producers besides plants? because they make carbon-based molecules, usually carbohydrates. bacteria and Algae.
how much energy do consumers obtain when they eat and what happens to the rest? they obtain 10% and the rest of the 90% is used by the producer for growth.
plants pull carbon fro the atmosphere to make food, through a process called what photosynthesis
when plants and animals die and what, carbon goes back into the ground their bodies wood and leaves decay
some carbon is buried deep in the ground and forms what fossil fuels
when humans burn fossil fuels, what is released back into the atmosphere five and a half billion tons of carbon
when humans and animals exhale, they release carbon back into the air by a process called what respiration
2 ways nitrogen becomes useable to plants, humans, and animals for protein and DNA, or if there broken apart, or types of bacteria, or by bacteria associated with bean plants
how do herbivores obtain the nitrogen they need by eating plants and other animals that contains nitrogen
how is nitrogen returned to the atmosphere bacteria are able to change the nitrogen and dissolving it into waterways into a form that allows it to return it to the atmosphere.
what are two ways humans impact the nitrogen cycle factories, and power plants
how are biomes determined the world's major communities, classified according to the predominant vegetation and characterized by adaptations of organisms to that particular environment.
what are the 6 biomes of the world tundra, taiga, forest, grasslands, desert, and temperate deciduous forist.
what are the freshwater ecosystems having a low salt concentration, usually less than 1%
what are the marine ecosystem three-fourths of the earth's surface is covered including oceans, coral reefs, and estuaries. supplies much of the world's oxygen supply and takes in a huge amount of atmospheric carbon dioxide. the evaporation of the seawater provides rainwater for the l
Created by: 3080851



Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards