Science Chapter 6 Review

Preserved parts or traces of animals and plants that lived in the past are called

• deposition

• erosion

• fossils

Erosion is one of the processes involved in the formation of sedimentary rock. Which of these best describes the process of erosion?

• Rocks are broken into smaller pieces that remain in the same location.

• Pieces of rock or soil are carried from one place to another.

• Pressure compacts layers of sediment and turns them into rock.

• Sediment grains fall to the bottom of a lake to form sedimentary layers.

How are fossils created?

• Dead organisms are quickly buried for millions of years.

• Traces of organisms get turned into stone.

• Animals get trapped.

• All of the above

Sedimentary rocks form when broken bits of other rock are deposited and then -

• buried and squeezed and cemented together

• melted by the heat of the Earth's core

• completely dissolved in the salt water of the ocean

• used by humans as a natural resource

Which of the following is NOT something you could learn from a fossil?

• What the animal ate

• The size of the animal

• Where the animal lived

• The color of the animal

Which of the following fossil discoveries best demonstrates a change in the Earth's surface?

• Scientists discover a large number of footprints of different sizes

• Scientists discover fossils of underwater organisms in an area of dry land.

• Scientists discover fossils of straight teeth buried below fossils of curved teeth.

• Scientists find an area that contains a variety of plant fossils but no animal fossils.

Scientists found an index fossil in layer Z that was about 400 million years old. They determined that in that area, a new layer of earth was deposited every 50 million years. If a fossil was found in layer W, how old was the fossil?

• less than a million years old

• about 300 million years old

• about 100 million years old

• over 400 million years old

Scientists began to dig in a new location where there are many layers of artifacts and fossils. Today, archaeologists reached the lowest layer and discovered fossils of fish bones and plants there. What might have been in this area many years ago before all of the other layers of fossils came into being?

• water

• desert

• mountains

• restaurants

What type of rock is shown above?

• sedimentary rock

• igneous rock

• metamorphic rock

How do you know this is sedimentary rock? Choose two answers.

• The rocks are in layers.

• The rocks contain fossils.

• The rocks have other rock parts in them.

• Layer B has no fossils