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Water cycle
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100
The formation of water droplets making clouds is this process.
What is condensation
100

A flea living on a dog and harming the dog. What type of symbiosis is this?

What is a parasite or parasitism?

100
These are the living and non-living things in an ecosystem.
What is biotic and abiotic?
100
These organisms are responsible for the decay of dead matter in the ecosystem.
What decomposers?
100
The concentration of toxins in top-level predators grows because of the toxins accumulated by their prey species.
What is biomagnification.
200
Water that falls on the ground collects in lakes and rivers through this process.
What is run-off?
200
A structural change in an animal that, over time, helps its species to survive and compete better in its ecosystem.
What is an adaptation.
200
This is the study of communities of organisms living together in an area.
What is ecology?
200
In a food web these are the only organisms that produce their own food.
What are producers (plants)?
200
The ultimate source of energy for all living things.
What is the sun?
300
Plants releasing water into the air.
What is transpiration or Evapotranspiration.
300

The relationship between remoras and sharks where the remorah gets food and the shark gets parasites removed, thus they both benefit. What type of symbiosis is this? 

What is mutualism?

300
Food, Shelter, Gas exchange and Water.
What are the needs of living things?
300

Frogs and lichens are examples of these types of species, which help scientists monitor the health of an ecosystem because they are sensitive to environmental changes.

What are indicator species

300
These show the transfer of energy within an ecosystem
What is a food web?
400
Moisture and water returned to earth as rain, snow or sleet.
What is precipitation?
400
Animals that eat the remains of other animals.
What are scavengers?
400
Contaminants in an ecosystems that cause damage to parts of the ecosystem.
What is Pollution.
400
Secondary and tertiary consumers
What carnivores and omnivores?
400
The first organisms to start creating an ecosystem from nothing.
What are pioneer species?
500
Water sources that we generally don't see.
What is ground water?
500

This type of species can upset ecosystems by outcompeting native species for resources and having no natural predators.

What is an invasive species

500

This type of ecological pyramid shows the number of individual organisms at each trophic level in an ecosystem, often becoming narrower at the top due to fewer predators.

What is a pyramid of numbers

500
A relationship where one organism benefits and the other is unaffected.
What is commensalism?
500

the ecological process where a disturbed habitat, already harboring some life and nutrients, is recolonized by plants and animals

What is secondary succession?