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21 terms

4th grade Science, Rocks

CLS 4th grade science, Rocks
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4 Properties to tell minerals apart
color, luster, streak, hardness
4 examples of sedimentary rock
Conglomerate, shale, limestone, rock salt
3 kinds of fossils
imprint, molds, cast
3 things that need to happen to a fossil to show
Collect the bones, remove rocks from the bones, assemble the bones
2 things fossils can tell us
characteristics of the organism, AND the environment in which it lived
2 things that cause a change to metamorphic rock
heat and pressure
2 things footprints can tell us
the size and how it walked
streak plate
a glass plate that minerals can be rubbed against
rock cycle
sequence of events in which rocks are formed, destroyed, altered, and reformed by geological processes
Minerals
A naturally occurring substance
Amber
hardened tree sap
Lava
Magma that reaches the earth's surface
Geologists
a scientist that studies the visual properties of rocks
Relative Age
the age of things, the age of a rock compared to the ages of rock layers
Petrified
Living things that turn to st, when the hard parts of a dead organism are changed to stone
Imprint
A fossil created by a print or impression
Sediments
Deposited rock particles and other materials that settle in a liquid
Magma
Melted rock material
Luster
The way a mineral reflects light
Igneous Rock
fire made rocks formed from melted rock materials
Cast
A fossil formed or shaped within a mold