This type of fossil forms when minerals replace the bone, shell, or other hard parts of the living thing. 

Plants, animals, and water are all considered to be__________________ resources because they are regularly replaced or replenished by nature.

_________________ is the process that presses sediments together due to the weight of the upper layers. 

_______________ is the process in which dissolved minerals crystallize and glue particles of sediment together.

_________________ occurs when running water or wind erosion loosen and carry away fragments of rock. 

___________________ is the process by which sediment settles out of the water or wind carrying it.  

Moving water. moving air, coal, gasoline, sunlight and oil are all examples of ________________ resources.  

Finding fossil starfish in rocks in your back yard would give you a clue that long ago the environment there was _________________.

Biodegradable packaging that will break down easily when exposed to nature helps us to ________________ material waste. 

Shredding and melting down aluminum cans to make new cans is an example of a way to __________________ material resources.  

If you get a bag from the grocery store and take it with you next time you shop, you are helping to _______________ material resources. 

Fossilized footprints, tracks, trails and borrows made by living things are classified as ____________________ fossils.

The lowest layer in your sedimentary sandwich was the ______________ layer. 

The part of the word "metamorphic" that means "changed" 

Heat and _______________ are two things that change igneous or sedimentary rocks into metamorphic rocks.

One kind of nuclear energy called _______________ results when the nucleus of an atom is split apart. 

Most often, the element used for nuclear fission is the radioactive element __________________. 

Horseshoe crabs today are very similar to the horseshoe crabs that lived many years ago.  

Turbines and generators turn the energy of moving water (like the water falling over a dam) into __________________. 

If you find a seed fern, it can tell you that the environment in that place was a swamp, even if it is not a swamp today.  

Plant and animal matter containing energy is known as ___________________. 

Amber is the hardened resin or _____________ of evergreen trees. 

A plant's or animal's _________________ is the area where it lives; it can be destroyed by natural occurrences or by human activities.  

Plants can be in danger of over hunting as well as animals.

Coprolites are the petrified remains of animal ______________ and can give us clues to what the animal ate. 

Insulating homes, using public transportation, and using cars that get better gas mileage, are ways to reduce _________________ of fossil fuels. 

Coal has been found in Antarctica. 

The climate of Antarctica was once much warmer than it is today. 

Shallow seas once covered areas in the Midwestern United States.

Scientists who study rocks are called ______________. 

Scientists use the law of _________________ to determine the relative age of sedimentary rock layers. 

In horizontal rock layers the _________________ layer is at the bottom. 

Obsidian, a heavy black rock that looks smooth and glassy is classified as _________________ rock because is formed from lava. 

This is the space in a rock that has the shape of the living thing that once was in that space. 

This is the model in the shape of a living thing that forms when minerals or rock particles fill a space.

Resources that can only be used once or are not replaced by nature as quickly as they are used. 

______________ that covers a dead animal in shallow water becomes rock preserving parts off the animal.  

Energy from the sun is called ______________. 

This type of fossil formed when thin objects such as leaves, fish, and feathers can leave impressions in a soil or sediment before it hardens. 

Melted rock that is underground is called _______________.

A _______________ is an engine that converts the energy of moving wind into mechanical energy. 

Melted rock that is above ground like when it comes out of a volcano is called ________________. 

A ________________ is used to convert mechanical energy into electrical energy.

Organisms such as Gingko trees, that are very similar to the once that lived many years ago, are referred to as living fossils.

Fossils of ocean animals can be found in the Rocky mountains of Canada showing that the environment there was once under sea.

Geothermal heat is created using the heat from within the ____________________. 

Fossils preserved in tar could last for millions of years. 

Air and water pollution can damage or destroy habitats such as forests or coral reefs.

Plants or animals that are in immediate danger of becoming extinct are categorized as an ___________________. 

Land that is set aside for endangered species to live is called a wildlife preserve or ___________________. 

Oil, coal, and natural gas are considered _____________ fuels because they come from the ____________ remains of organisms. 

Another name for oil is _____________________.

Scientists who study fossils or ancient life are called ___________________.

Plants and animals are both considered to be _________________ resources.

Minerals are a ______________ resource. 

Moving water is an _____________ resources.

Soil is a ___________________ resource.

Peat is a form of biomass.

Making a compost pile using garbage is _____________. 

A limestone statue is pitting and crumbling.  This is probably due to _____________. 

The ___________ time scale is Earth's history broken down into blocks of time.

An index fossil must have lived ___________ and also be widely distributed.