describes a group of living things that is no longer living
What is extinct
100
in petrified wood, the soft parts of the once-living plant were replaced by this
What are minerals?
100
Scientists may learn what an animal ate by looking at the shapes of this fossil item.
What are teeth?
100
Layers of a rock can be used to tell how _________ a fossil is.
What is old?
100
Finding these explains why scientists believe southern some mountains in CA were once covered with ocean water.
What is a clam fossil
200
the hardened remains of a living thing that died long ago
What is a fossil
200
Animal fossils are more common than plant fossils because plants have this.
What are softer body parts?
200
By comparing fossils, we can determine that some living things have not done this in millions of years.
What is changed?
200
Deeper layers of rock are ___________ than the layers above.
What is older?
200
Flat teeth in an animal tell us this about the animals diet.
What is a plant eater.
300
the shape of a once-living thing left in sediment; it is a cavity shaped like the plant or animal
What is a mold
300
We do not know what many ancient plants look like because they did this before they could form a fossil.
What is rotted away
300
Scientists compare animal fossils to similar animals that are alive today. For example the elephant and the mammoth both have these.
What are tusks?
300
These two things that form metamorphic and igneous rock often destroy plant and animal parts before they can form a fossil.
What are temperature and pressure?
300
Foot and leg bones of an animal tell us this.
What is can the animal run or climb?
400
forms when mud or minerals later fill a mold; it is the actual shape of the once-living thing
What is a cast?
400
Fossils are usually found in this type of rock
What is sedimentary?
400
If two fossils are found in the same rock, scientists can infer that these two things did this.
What is lived at the same time?
400
An animal still looks much like it did millions of years ago so we can infer this about a fossil of that animal.
What is The fossil of the animal will much like the animal that is still living today.
400
This place in California will help you learn about fossils
What is the Natural History Museum?
500
forms when mud or minerals later fill a mold; it is the actual shape of the once-living thing
What is amber?
500
Describe the steps for a fossil to form in sedimentary rock.
What is :
1) soft parts of the animal decompose
2) hard parts of the animal are buried under layers of sediment
3) the bones and sediment turn into rock
500
If two fossils are found in the same rock, scientists can infer that these two things did this.
What is what did an animal eat? How old was the animal? Was the animal male or female?
500
Suppose a plant and animal die on the same day. Which one will most likely become a fossil? Why?
What is The animal because it has more hard parts than the plant
500
Marine animals that have long been extinct are called by this name.