Which of the following are NOT an example of sediments?

• sand

• large rocks

• pebbles

• clay

Which layer is the oldest?

• siltstone

• conglomerate

• limestone

• mudstone

Sedimentary rocks are formed because of

• compaction and cementation

• compaction and compression

• compression and pressure

• heat and cementation

Most fossils form from

• the muscles and organs of the animals body

• the bones, horns and teeth of an animal

• the skin of an animal

• the fur of an animal

Sedimentary rocks form in

• crystal shapes

• a large mixture of different sediments

• layers of sediments stacked on top of each other

The impression of a trilobite is a

• true form fossil

• mold fossil

• cast fossil

• trace fossil

Dinosaur tracks are an example of

• trace fossils

• true form fossils

• mold fossils

• cast fossils

Sedimentary rocks take _______________ to form

• millions of years

• hundreds of years

• a few years

• a few months

Fossils are an important source of

• fuel for making electricity

• fuel for our cars

• information about life on Earth a long time ago

• information about life on Earth now

A mammoth preserved in ice in the Arctic tundra is an example of

• a true form fossil

• a mold fossil

• a cast fossil

• a trace fossil