When the concentration of a fat-soluble pesticide increases as you move up a food chain

Species that expand their range and out compete when the opportunity arises

The variety of life on Earth, in all it's forms and all its interactions

What other global crisis is the loss in biodiversity almost surpassing?

And example of a Density-Independent limiting factor is...

And example of a Density-Dependent limiting factor is...

What two processes are compliementary to each other in the carbon cycle?

Can matter be created or destroyed?

What percentage of our air is nitrogen?

What does nitrogen have to be "fixed" to in order to use it?

What is NOT a carbon reservoir?

Too much nitrogen fertilizer in water bodies creates exponential aquatic _______________ growth!

Nitrogen can be fixed by _______________ in the soil or in plant roots.

The transfer of energy through the collision of particles

Would clean snow have a HIGH albedo or LOW albedo?

Would exposed soil have a HIGH albedo or LOW albedo?

Have we always had (before humans) a greenhouse gas effect?

Humans are changing the greenhouse gas effect by ___________________ the amount of greenhouse gases.

What do things do when they get warm?

Earth's curved surface and tilt cause what?

Is the total amount of energy consumed by the grasshopper available for use by the bird who eats it?

What is humanity driving in many places?

Natural ecosystems operate in _______________: plants grow in soil, animals eat plants, dung replenishes soil...

In the Water Cycle: what is the process when liquid water changes into water vapor?

In the Water Cycle: what is the process when water vapor changes into liquid water?

How much of the water on Earth is fresh water?

What is the name of this process?

Nitrogen is a building block of _____________

The majority of nitrogen is "fixed" by

Pulse crops include lentils, peas, alfalfa... These crops are all ________________.

What is Earth's largest carbon reservoir?

Energy can be transferred through the collision of particles, this is called...

The greenhouse gas effect ____________ heat radiating from Earth towards space

What do things do when they get warm?

Why is the United States not one of the world leaders in climate change?

What is NOT one of the four levels of biodiversity?

What is the important role of organisms such as fungi and bacteria?

Hot water or hot air will ______________ because it is less dense.

Why are algal blooms bad for water bodies? Because they can lead to low amounts of _______________ in the water.

What is an Inorganic carbon reservoir?

Which of the following is a NATURAL source of greenhouse gas emissions?

The ________________________ of fossil fuels is releasing an enormous amount of carbon dioxide, causing an imbalance in the carbon cycle.