The variable directly controlled and changed by scientists.
What is the independent variable?
Dark, solid rock used for electrical production and heating.
What is coal?
The region that is closest to the ocean and made up of pieces of rocks (sediments).
What is the coastal plain?
Fossil fuels make up over this quarter percentage of the United States' energy (0%, 25%, 50%, 75%)
How much is 75%?
Words that begin with "r" that help people reduce dependence upon natural resources.
What are recycling, reducing, and reuse?
The variable that changes and is observed.
What is the dependent variable?
Small rocks used in construction.
What are gravel and crushed stone?
The region that is high up in the mountains, far to the southwest, and has coal and natural gas.
What is the Appalachian Plateau?
This mined energy source is the most important in Virginia's economy.
What is coal?
How people generate carbon dioxide, a greenhouse gas.
What is burning flammable substances, such as wood or fossil fuels?
Things within an experiment kept the same to ensure consistency between trials.
What are constants?
Flammable gas, similar to methane, used as a heat source, cooking fuel, and lighting.
What is natural gas?
Thin region of alternating mountains and lower areas.
What is the Valley and Ridge?
A disadvantage to fossil fuel energy sources.
What is a limited, non-renewable supply?
This clean, river-based renewable type of energy that releases little pollution has a primary disadvantage in that it damages river ecosystems.
What is hydroelectric or water?
The scientific method step that tests the hypothesis.
What is the experiment?
Element used in glass, electronics, and some non-latex rubber.
What is silicon?
Very thin mountainous region that appears blue from a distance.
What is the Blue Ridge?
The impacts of cloud cover and day lengths on this particular energy source.
What are the limits to solar energy?
Chemicals humans release in excess that cause climate change and global warming.
What are methane, carbon dioxide, and water vapor?
The format that the hypothesis is written in.
What is "If... then..."?
Ingredient used in metallurgy.
What is zirconium?
Widest region that continues from rolling hills in the west to flat sediments (pieces of rocks) to the east; underlain by metamorphic rocks.
What is the Piedmont?
Energy resource that depends up the fission -- or splitting into smaller atoms for energy.
What is nuclear or uranium?
Processes that describes how humans affect the atmosphere through air pollution from industry, transportation, electrical production, and agriculture.
What are climate change and global warming?