Geologists determine the age of rocks by measuring their radioactivity with special detectors.
Oops!
Check
Okay!
Check
15
What important development in the Earth's atmosphere happened during the Proterozoic eon?
During the Proterozoic eon, oxygen began to build up in the Earth's atmosphere.
Oops!
Check
Okay!
Check
5
True or False: Dinosaurs were the most important animal group during the Mesozoic era for nearly 200 thousand years.
False. Dinosaurs were there for 200 million years!
Oops!
Check
Okay!
Check
15
What significant events occurred during the Hadean eon?
During the Hadean eon, the Earth was hot, had many volcanoes, and experienced collisions with comets and meteors. There was no oxygen in the atmosphere.
Oops!
Check
Okay!
Check
10
What do we call the temperature, winds, and other conditions of the atmosphere?
weather
Oops!
Check
Okay!
Check
baam
Lose 5 points!
Oops!
star
Double points!
Okay!
gift
Win 15 points!
Okay!
thief
Give points!
5
10
15
20
25
heart
Other team wins 25 points!
Oops!
fairy
Take points!
5
10
15
20
25
gift
Win 20 points!
Okay!
lifesaver
Give 25 points!
Oops!
5
True or False: The first mammals appeared at about the same time as dinosaurs.
True
Oops!
Check
Okay!
Check
10
What do we call strong winds and heavy rainfall?
storms
Oops!
Check
Okay!
Check
5
True or false: Most fossils are found in layers of igneous rock.
False. sedimentary rock
Oops!
Check
Okay!
Check
15
What happens to air when it moves from high pressure to low pressure?
It moves from areas where air pressure is high to areas where air pressure is low.
Oops!
Check
Okay!
Check
boom
Lose 50 points!
Oops!
rocket
Go to first place!
Okay!
rocket
Go to first place!
Okay!
baam
Lose 25 points!
Oops!
10
Who measures the conditions that describe the weather?
Meteorologists
Oops!
Check
Okay!
Check
5
True or False: A fossil is the remains of a living thing that has been preserved for millions of years.
True
Oops!
Check
Okay!
Check
15
Describe how the continents changed during the Phanerozoic eon.
During the Phanerozoic eon, animals became common, and the continents drifted together to form the supercontinent Pangaea, which later split into the continents