scientific Methods
Energy flow in the ecosystems
Populations
Natural Selection
100

what does a hypothesis do

introduces a research question and proposes an expected result.

100

What does nuclear energy do.

the energy in the nucleus, or core, of an atom.

100

What does Populations mean?

a group of individuals, objects, events, organizations, etc.

100

What does Natural selection do for us

This results in a new generation of organisms that are more likely to survive to reproduce.

200

What is a dependent variable.

what changes as a result of the independent variable manipulation in experiments.

200

What does chemical energy do

A chemical is any substance that has a defined composition. In other words, a chemical is always made up of the same "stuff." Some chemicals occur in nature

200

what does pouplations density mean

allows for broad comparison of settlement intensity across geographic areas.

300

What's an independent variable?

An independent variable is exactly what it sounds like. It is a variable that stands alone and isn't changed by the other variables you are trying to measure.

300

What does the food chain mean 

The food chain describes who eats whom in the wild. Every living thing—from one-celled algae to giant blue whales—needs food to survive.

300

What does exothermic mean and what does it do

An exothermic process releases heat, causing the temperature of the immediate surroundings to rise.

400

what does a Experimental group?

receives the variable, or treatment, that the researchers are testing.

400

Why is secondary production good and what does it do

 can represent the formation of mass for an entire trophic level.

400

What does prediction mean and do

an act of saying what will or might happen in the future

500

What does a control group do?

establish a cause-and-effect relationship by isolating the effect of an independent variable.

500

What does the food web is good and what does it do good for us 

This balance helps the ecosystem maintain and recycle biomass.

500

an act of saying what will or might happen in the future

A habitat is a place where an organism makes its home.

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