Show:
Rocks & Minerals
Fossils
How Rocks Change
How Fossils Form
Miscellaneous
100
a naturally occurring substance that is neither plant nor animal
What is a mineral?
100
hardened tree sap, often a source of insect fossils
What is amber?
100
a process by which rocks are changed from one type into another
What is the rock cycle?
100
when insects are trapped in tree sap, and the sap hardens, it becomes _____________.
What is amber?
100
scientist who studies the physical properties of rocks
What is a geologist?
200
rock formed when bits or layers of rock are cemented together
What is sedimentary rock?
200
a fossil formed by print or impression
What is an imprint?
200
process by which sediments turn into sedimentary rock
What is cementing?
200
when once-living parts are filled in by minerals
What is petrified?
200
hardness, streak, luster
What are three properties used to identify minerals?
300
"fire-made" rock formed from hot, molten rock material
What is igneous rock?
300
formed or shaped within a mold
What is a cast?
300
pebbles and large grains of sand cemented together
What is conglomerate?
300
when plant or animal remains are quickly buried in this type of rock and left undisturbed for years, they become fossils.
What is sedimentary rock?
300
molten rock below earth's surface
What is magma?
400
rock that has been changed by heat, by pressure, or both
What is metamorphic rock?
400
a hollow fossil form clearly showing the outside features of the organism
What is a mold?
400
melting, then cooling and hardening
What is what causes metamorphic rock to become igneous rock?
400
scientists find these in an area that was once cool
What are fossil evergreen leaves?
400
a process by which rocks are changed from one type to another
What is the rock cycle?
500
pieces are mixed into cement to build things, mixed into asphalt to pave roads, make sculptures
What are ways rocks are used?
500
fossils form when plants or animals die, leaving a thin film of this
What is carbon?
500
how any type of rock becomes metamorphic rock
What is heat and pressure?
500
the skin
What is the part of an animal least likely to become a fossil?
500
the age of something compared with another thing
What is relative age?