An ___ is a country who's main economic activity consists of subsistence agriculture.

All continents are connected at some point or another.

Libya is a...?

Water based pollutants can most easily spread in...?

How do landmasses and oceans differ from one another?

In HICs the main economic activity(ies) is/are ________.

If everyone consumed as many resources as the average American, how many Earths would we need to fuel the demand for consumer goods?

Are "green" products actually better or worse for the environment?

Where is most of the world's fresh water stored?

Water is most dense at _ degrees Celsius.

If the route of water is disrupted as it's falling down from the clouds as precipitation then it is...?

Most water movement once it gets down to the Earth actually takes place underground

Solid ice and snow play a part in Earth's temperature regulation because they have a high ______.

If water takes a slanted path right after infiltration but remains near the surface then it's said to travel via...?

Transpiration is part of the water cycle.

Which layer of the atmosphere do we inhabit?

The ozone layer is located in the _____ part of the stratosphere.

Select all the greenhouse gasses from this list.

Nitrous Oxide is a more potent greenhouse gas than Methane

________ bonds give water molecules nearly all of their special properties.

Which type of Ultraviolet light is usually responsible for splitting oxygen atoms, therefore creating ozone in the stratosphere?

What event started the current change in the percentage of greenhouse gasses in the atmosphere?

The air that we breathe and is in the atmosphere is mostly made up of ________.

Which of these is known as the "Unit of evolution"?

Ecosystems are defined by which two factors?

A solution with a pH of 6 is ____ times more basic than a solution with a pH of 3.

Biomes stay constant over time

What is one of the rarest biomes on the planet

Most of the energy that is gained through predation and feeding is lost as...

From what process does MOST of the energy on LAND and the surface of the ocean originate from?

What are the PRODUCTS of Photosynthesis?

The MAIN way that humans have disrupted the carbon cycle is by...

Do producers HAVE TO outnumber every other group in the trophic pyramid?

Water and nutrients (ex. phosphorus, carbon, nitrogen) travel in (blank) in ecosystems.

Underground most Carbon is stored in...

Combustion releases Carbon in the gaseous form, specifically that main gas is called...

Carbon RETURNS to living organisms through which of the following processes?

Select ALL the major carbon sinks.