Show:
Fossils!
Time lines!
Rocks!
Minerals!
Random Stuff!
100
they are useful because they help scientists learn about prehistoric events and species.
What are fossils?
100
These timelines start from the present day.
What is Geological timelines?
100
Made when a rock changes due to heat and/or pressure.
What is Metamorphic Rocks?
100
Chemical makeup is also called this.
What is composition?
100
A time scale that shows how many years ago different events happened.
What is a numeric time scale?
200
Fossils are usually found in this rock.
What is sedimentary rock?
200
Has existed for about 4.5 billion years.
What is Earth?
200
Made when molten rock cools and hardens.
What is igneous rocks?
200
Scientists classify rocks by this.
What is chemical makeup (composition)?
200
This canyon in the south-western part of the U.S was formed 10-18 MYA.
What is the Grand Canyon?
300
They live for a short amount of time in many places.
What is Index Fossils?
300
Have existed about 200,000 years. This represents a fraction of Earths Geological history.
What is humans?
300
Marine organisms exhaling carbon dioxide into ancient seawater or their shells being glued together from a matrix.
What is the 2 ways sedimentary rocks are formed?
300
These are the most common group of minerals. They make up 90% of the earths crust.
What is silicates?
300
The Grand Canyon was created by this as it ran over the Colorado plateau.
What is the Colorado River?
400
They are the first fossils found.
What are trilobites?
400
Earths history is divided into Eras which are divided into...
What is Periods?
400
When Igneous rocks form inside a volcano.
What is intrusive rocks?
400
The 4 characteristics of a mineral: 1. forms in nature 2...
What is 2.is a solid 3.definite chemical makeup 4.crystal structure
400
Gneiss is this type of rock.
What is metamorphic?
500
They are the first dinosaur fossils.
What is a dinosaur tooth?
500
This era began about 570 MYA. Trilobites were known to live then.
What is the Paleozoic Era?
500
This rock is the hardest material on earth.
What is diamonds?
500
Finish the phrase: all minerals are rocks but...
What is not all rocks are minerals?
500
Chalk is this rock type.
What is sedimentary?