The innermost layer of Earth; it has two parts inner and outer.
What is Core?
100
A type of rock that has been changed by heat and pressure into another kind of rock.
What is Metamorphic rock?
100
The process of taking a resource from a product and using it to make a new product.
What is recycle?
100
A large system of stars, dust, and gas.
What is a galaxy?
100
The process of ancient remains of organisms turning to stone.
What is fossilization?
200
The outermost, rocky layer of Earth.
What is crust?
200
A type of rock formed when layers of sediments are pressed together and hardened over time.
What is Sedimentary rock?
200
Natural resources that cannot be readily replaced in our lifetimes, or our children's or grandchildren's.
What is Nonrenewable resources?
200
Rocks form the asteroid belt that burn up as they speed through the Earth's atmosphere.
What is a meteor?
200
Organic rock formed from the remains of plants that thrived in swamps thousands of years ago. Over time thick layers of plants remains were turned to this.
What is coal?
300
The thick layer of rock between Earth's crust and core.
What is Mantle?
300
A rock that forms when magma or lava cools and hardens.
What is Igneous rock?
300
Natural resources that can be replaced as they are used.
What is renewable resources?
300
The oval shaped path a planet follows as it revolves around the sun.
What is orbit?
300
A type of coal that is hard to find. It produces lots of heat with little smoke.
What is Anthrocite?
400
A force of nature that builds up different features on Earth's surface and may alter the crust.
What is constructive force?
400
Granite, Gabbro, Basalt and Obsidian are this type of rock.
What is Igneous rock?
400
A natural resource that can be used more than once.
What is Reuseable resource?
400
A natural satellite in space that revolves around a planet.
What is a moon?
400
A type of coal that is found in Russia. It is formed from decayed plants. When it is burned it makes lots of smoke.
What is Peat?
500
Harmful substances in the air; mostly caused by humans.
What is air pollution?
500
Sandstone, limestone, shale and Conglomerate are this type of rock.
What is sedimentary rock?
500
A natural resource that has an endless supply.
What is inexhaustible resource?
500
A burst of energy from the suns surface.
What is solar flare?
500
A type of coal that has sand, mud, and lignite. It is used around the world. It produces lots of smoke and heat.