Any trace, mark, or remains of an organism is a _________.
fossil
100
Hardened tree sap is called ____________.
amber
100
Age expressed by words such as older, oldest, younger is called the ____________________.
relative age
200
What are fire-made rocks called?
igneous rocks
200
What does turned to stone mean?
petrified
200
What are rocks formed from smaller bits of rock pressed together called?
sedimentary
200
What is the never-ending process in which rocks are changed from one type to another?
rock cycle
200
What are rocks that form from heat and pressure called?
metamorphic rocks
300
What is a hollow form with a particular shape called?
mold
300
What type of rocks are fossils more likely to be found in?
sedimentary
300
Name the 3 types of rock.
igneous, sedimentary, metamorphic
300
What are rocks made of?
minerals
300
Something that is formed or shaped in a mold is called a ___________.
cast
400
Name the four main properties scientists study to identify minerals.
color, luster, streak, hardness
400
What would a fossil of a fern leaf found in Alaska tell scientists about that area?
The area used to be warm.
400
Name two things scientists can learn from fossils.
size of animals, what animals ate
400
Explain the rock cycle.
Weathering. erosion, pressing and cementing form sedimentary rocks; heat and pressure form metamorphic rocks; melting, cooling, hardening forms igneous rocks.
400
Name 3 other ways living things become fossilized.