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Rocks and Minerals

QuestionAnswer
Are remains or evidence of ancient plant and animal life on Earth. Fossils
This period of time was about 544 million years ago. Fossils of fish, simple plants, insects, and the first animals to live on land are in rocks. Paleozoic era
Shows how rocks change from one type of rock to another. Rock Cycle
When the weight of the layers and sticky clay minerals in the sediment hold particles together. Sedimentary rocks
The way a minerals surface reflects light. Luster
The most common igneous rock. The ocean floor is made up of this rock. Basalt
Looks like glass, forms when lava cools very rapidly. Obsidian
This mineral makes up more than half the minerals in Earth’s crust. Feldspar
In this era some flowering plans and bees began to appear. Cenozoic era
The color of the powder that a mineral leaves when it is scratched on a special plate. Streak
Rocks from this era have fossils of jellyfish in them. Precambrian era
This era was about 248 million years ago. Fossil evidence shows dinosaurs appeared and then became extinct during this period. Mesozoic era
Is formed from lava that has lots of gas bubbles. This floats on water. Pumice
Made up of quartz, feldspar and mica. It is a slowly cooled igneous rock. Granite
Testing for this is seeing how easily a mineral can be scratched. Hardness
Rocks that have changed as a result of heat and pressure are known as these types of rocks. Metamorphic rocks
Color, luster, hardness, streak, and cleavage are examples of these. Physical Properties
The movement of bits of rock, soil, shells, and dead plant and animal matter from one place to another. Erosion
Natural, nonliving solid crystals that make up rocks. Minerals
Eroded material that settles on land or on the bottoms of lakes, rivers, and oceans. Sediment
This is molten rock. Magma
These rocks are formed when molten rock cools and hardens. Igneous rocks
Created by: blaubusch
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