The main use of fossil fuels by humans is to use the thermal energy they contain to produce_________________________

Passive solar heating makes use of the sun's energy ______________

When an organism reaches its _____________________, the number of organisms will level off and be in equilibrium with the surrounding ecosystem.

A remora is attaching itself to a shark for a free ride and to eat the scraps dropped by the shark without affecting the shark is an example of _______________________

One advantage of nuclear energy is that it does not produce any ___________________

When all the resources are used and no more resources such as space or food are available, a ________________ must stop growing.

Coal, Natural Gas and Oil are known as _____________________

Nuclear power, Hydro-power and Biomass are known as __________________ energy alternatives. 

Solar, Wind and Geothermal energy are known to be _______________ and _________________ energy sources.

Burning _________________ releases carbon dioxide into the atmosphere. 

Fossil fuel usage in the US is contributing to global warming because of the amount of ______________ that is being released into the atmosphere. 

_______________________ is the process to drill and fracture the bedrock to release natural gas.

__________________________ is when one organism benefits and the other is unaffected.

Fleas and ticks feeding off blood of mammals are examples of _________________

Ecosystems located near the equator, such as Tropical Rain Forests, have more _______________ than ecosystems at other locations on the planet. 

A bird that eats food particles from a crocodile's teeth; thereby cleaning the crocs teeth is an example of ____________________

Controlling __________________________ growth is more successful when women have access to birth control and family planning resources. 

High female literacy rate is usually associated with ___________________ countries.

The production of _______________ involves heat and pressure to convert plant material to Peat and finally Anthracite. 

The first step in the conversion of coal to electricity requires that the coal be ____________________ and then burned to turn a _______________.

______________________ are organisms that feed on or live on another organism usually harming the host. 

In an ecosystem, the higher an animal is up the food chain, the __________________ you have of them in the ecosystem.

One of the uses of biomass in a____________________ country is to burn wood for heating and cooking. 

The US gets the majority of its energy from __________

The area where fresh water and salt water mix to form brackish water is called an ____________

Using public transportation, reducing the amount of electricity we use and using insulation are all ways to increase ______________________

Energy _____________, while matter ____________ in an ecosystem.

Biome characteristics are most affected by the ____________________ of a location.

If you see large grazing herbivores, you are most probably in the __________________

Moving up the energy pyramid, if 7000 kcal are available at the bottom, how much energy is available at the next level up?

Sunlight, water and oxygen are all examples of ____________ factors

Animals, plants and fungi are all examples of _______________

The most important function of the __________________ is that they act as a filter to help clean the water. 

Separating oil into different components based on boiling points is also known as ___________

An __________________ is defined as all of the interacting organisms that live in an environment and the abiotic parts f the environment that affect those organisms