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Astronomy
Earth history
Clouds
Atmosphere
100
Cluster of billions of stars
What is a galaxy best described as?
100
Paleontologist
What is a scientist who study's fossils
100
Cumulonimbus
What cloud has the most height?
100
Troposphere
What is the first layer of the atmosphere?
200
1 Astronomical unit
What is the distance between the earth and sun
200
Extinction
What is disappearance of a species called?
200
Stratus
What is the lowest level cloud?
200
Five layers
How many layers are there in the atmosphere?
300
A comet
What is a object mainly of ice having a elliptical path called?
300
Columbia
What is the very first continent?
300
Cumulus
What is the most common cloud?
400
Barred spiral galaxy
What is the Milky Way classified as in appearance?
400
Period
What is unit of time into which eras are subdivided.
400
Cirrostratus, Cirrocumulus, and cirrus
What are the three highest level clouds?
500
Grains of sand on earth
What is there more of, stars in the observable universe or grains of sand on earth
500
Coevelution
What is the process by which two species evolve in response to changes in each other over time
500
Wavy, feathery
What is the description of a cirrus cloud