Rock Layers
Fossils
How Fossils are Made
Importance of Fossils
Definitions
100
Breaking down rocks into smaller pieces is called _________________.
Sediment.
100
What is a fossil?
Remains of ancient living things.
100
How do fossils form in Amber?
An insect or animal part get stuck in tree sap and hardens.
100
What would the fossil of a shark found in the desert tell us?
The desert used to be under water.
100
What does extinct mean?
No longer in existence.
200
Explain how sedimentary rock forms.
sediments press together layer upon layer.
200
Do all parts of a plant or animal become fossilized? Explain.
No. Soft parts decompose. Hard parts may become fossilized.
200
How do fossils form in ice?
The animal or plant is trapped, frozen in ice for many years.
200
What can we learn about an animal from its fossilized teeth?
What it ate. Meat if the teeth are sharp. Plants if the teeth are flat.
200
What is a carnivore?
A meat eater.
300
Sediment moved around by wind or water is called _______________.
Erosion.
300
Why don't all parts of a fossilized animal stay together?
Some parts may be carried off by the weather like wind or rain or moved by other animals.
300
How does an imprint fossil form?
An imprint is made in mud. The soft parts decay. Hard parts are left and fill in with sediments.
300
What evidence do we have of past life on Earth?
Fossils.
300
What is an herbivore?
Eats only plants.
400
Which layer is the oldest 1,2,3,4,5, or 6?
1. Bottom Layer.
400
Bones, teeth, and eggs are examples of
a. petrified wood.
b. body fossils.
c. amber.
b. body fossils.
400
What is a mold fossil?
Mud builds up around a dead organism. When it decays, it leaves a hollow mold.
400
What do fossils tell us about the climate of the Earth?
The Earth has changed.
400
What is a paleontologist?
One who studies the past history of life.
500
Which layer is the newest or most recent?
6. Top Layer
500
How do we know that dinosaurs existed on the Earth?
Their fossils have been found.
500
What is a cast fossil?
Minerals and sediment fill up the hollow mold and make its shape.
500
What do fossils tell us about past plant and animal life on the Earth?
Plants and animals, like dinosaurs, once existed on the Earth but are now extinct.
500
What is an area called that is made up of living and non-living things?
Environment.