Answers may vary.
salt on food, halite in rock salt, quartz in window glass, gold and diamonds in jewelry, graphite in pencils, etc
100
Rocks are grouped into 3 types according to how they are ________________.
What is "formed?"
100
A fossil is (definition) ______________.
The trace or remains of a living thing that died long ago.
100
These two things are needed to form metamorphic rock.
What are pressure and temperature (heat)?
200
Definition of a ROCK.
What is: a naturally formed solid made of one or more minerals?
200
A form of quartz mineral that is purple in color and is often used in jewelry.
What is amethyst?
200
Made of several different minerals, this igneous rock is used by builders and homeowners because of its beauty and strength.
What is GRANITE?
200
Tell how a mold is formed.
The shape of a once-living thing was left in sediment when a rock formed. The living thing that made the mold dissolved, leaving only a cavity or hole shaped like the living thing.
200
A scientist suspects that sea life once lived in a desert area. He can prove his hypothesis by _____________.
What is: looking for fossils of fish and other sea animals in the desert rocks?
300
A rock that was once melted, then cooled and hardened.
What is an igneous rock?
300
Name two ways to identify a mineral.
What are HARDNESS (The Mohs Scale) and STREAK (the color left behind when a mineral is scratched on a surface)?
300
Sedimentary rock is formed in this way.
Rocks are broken apart by wind or water (erosion) and combined with soil and settle into layers. After a long time the layers harden into rock.
300
A cast and a mold are different because__________.
A mold is the shape of the once living thing left in rock, while the cast forms when mud or minerals fill in the mold.
300
Each year, scientists look for fossils near Los Angeles, California at a site that trapped many animals nearly 30,000 years ago. What is the name of this important site.
What are the LaBrea Tar Pits?
400
The definition of a MINERAL.
What is: a solid, formed in nature, that has never been alive?
400
The hardest known mineral on the Mohs scale. It is very difficult to scratch this mineral, and it can scratch many surfaces itself.
What is a diamond?
400
Sedimentary rock covers ______ of the Earth's surface.
What is: 75%?
400
The type of rock that fossils are most commonly found in.
What is sedimentary rock?
400
Name two types of fossils.
What are casts and molds?
500
A rock formed from material that settled into layers.
What is sedimentary rock?
500
Define The Mohs Scale
What is: a 10 point scale (1:softest-10:hardest) used by scientists to tell the hardness of a mineral?
500
The process by which one type of rock can change to a different kind of rock.
What is: the rock cycle?
500
Some things a scientist might learn from a fossil.
By the shape of the teeth, and the contents in the stomach area of the fossil, scientists can discover what the animal ate. They also can tell about the original geography of an area because of the type of fossils found there.