What is resources like food, water, shelter, living space, and sunlight.
100
This is the organism that is helped.
What is a parasite.
100
This is what succession is.
What is a slow gradual change from one environment to another that takes place over many, many years.
100
Fossils occur from species that have become this.
What is extinct.
100
These are some specific things humans do to affect the ecosystem.
What is pollute, destroy forests for lumber and building materials, spray crops, build roads, and build homes.
200
This is what keeps an ecosystem in balance.
What is when all organisms are getting what they need to live and grow.
200
This is the organisme that is harmed.
What is a host.
200
This is the number of stages that succession has.
What is 4.
200
These are some of the human reseasons of extinction.
What are habitat destruction, pollution, and hunting.
200
These are some of the ways humans pollute the water.
What is chemicals, oil spills, dust and dirt, trash and garbage in the water, and crop run-off from spraying crops.
300
A rabbit population is declining rapidly. This is the cause of the decline.
What is a lack of food for the rabbit or an increase in the predators, like fox, of the rabbit.
300
This is what the parasite uses the host for.
What is a food source.
300
This is what stage 1 in successio looks like.
What is no living things. No plants or animals. Lots of soil and water.
300
These are some of the natural causes of extinction.
What are meteors, volcanic eruptions, and climate changes.
300
This is the process that mining companies use to find natural rsources in the environment.
What is strip-mining.
400
Balanced ecosytems are constanly changing why?
What is species are born, they live, they die, and then they decompose which starts the cycle all over again.
400
Give an example of an insect parasite and tell what its host would be.
What is an asian long-horned beetle/tree, an emerald ash-borer/ash trees, a tape-worm/cat or dog.
400
This is what stage 3 would look like.
What is birds, insects, reptiles, fish, and mammals will be living there. The lake is filling in with soil and decomposed material making it smaller. The lake will gradually become a marshy enviornment.
400
These are some of the thngs scientists can learn from fossils. Name 3.
What is how old the organism is, where the organism lived, what the organism ate, and the size of the organism.
400
This is what it is called when mining companies have to replace, restore, and replenish what they take from the land.
What is reclamation.
500
This word means all living and no-living things are working together.
What is interrelated.
500
Give an example of a plant parasite.
What is mistletoe.
500
This is the other slow gradual change that can change an ecosystem over time.
What is a climate change.
500
This is the term for an orgamism whose population is declining and it is becoming les and less in number.
What is threatened.
500
This is what humans have done to preserve the environment.
What is create National Parks, stop littering, reduce, reuse, and recycle.