Geologic Time
Earth's Biological History
Rocks
Astronomy
A Little Mixed
100
Hydrogen sulfide
What is the cause of the Permian Extinction?
100
Rock layers.
What does startigraphist study?
100
Layered rocks.
What are sedimentary rocks?
100
The goddess of night.
What is 'nox'?
100
4.6 billion years.
How old is the earth, approximately?
200
Permian period.
What is the most recent period in the Paleozoic era?
200
Natural selection.
What is the cause of evolution according to Darwin?
200
Molten rock within the earth.
What is magma?
200
One million.
How many earths could fit inside the sun?
200
Scalding.
Which word best describes the lower mantle?
300
Cenozoic era.
What is the age of mammals and birds?
300
The Galapagos Islands.
Where did Darwin conduct much of his research?
300
They have changed in some way.
What has happened to metamorphic rocks?
300
Older stars and little gas.
What is inside an elliptical galaxy?
300
Diamond.
What mineral is ranked highest on Mohs scale?
400
epoch, period, eon.
What is the order of period, epoch, eon (from least to greatest)?
400
4 billion years.
How old are the oldest fossils?
400
Tectonic plates move towards each other.
What happens at convergent boundaries?
400
Solar energy.
How are most satellites powered?
400
The Oort Cloud.
Where was comet Hale-Bopp most likely formed?
500
Meteor or comet.
What is the cause of the K-T Extinction?
500
5
How many mass extinctions has Earth experienced?
500
Smooth faces.
What property of a mineral indicates it has cleavage?
500
Hydrogen and helium.
Which two elements make up most of the sun?
500
14 billion years.
About how old do scientists belive the universe is?
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