WorksheetsUnit 3, LS2 Check In "Formation of Earth"
Total questions: 20
Worksheet time: 10mins
How long ago did Earth form?
4.5 bya
3.5 bya
13.7 bya
13.7 mya
When did life first arise on Earth?
5432 ya
4.5 bya
3.8 bya
3.5 mya
What gases were present in the early Earth atmosphere before life was on the planet? (Choose all that apply)
nitrogen
methane
carbon dioxide
oxygen
What was responsible for putting oxygen into Earth's atmosphere?
solar radiation spliting the carbon away from carbon dioxide
cyanobacteria using photosynthesis
volcanic eruptions removing the oxygen from water (H2O)
chemical reactions with sulfur dioxide (SO2) from volcanic eruptions to release the oxygen
The longest period time in the Geologic Time Scale is a...
epoch.
millenia.
era.
eon.
Where do scientists think the abundant water on Earth originated?
comets and icy asteroids brought it during the Great Bombardment
the water was present in the proto-planetary disk that formed Earth
the contractional force of gravity squeezed water from the rocks of Earth's crust
Chemical reactions with hydrogen (H) and oxygen (O) in Earth's atmosphere formed water (H2O)
How did Earth get its moon?
A mars-sized protoplanet struck the early Earth and blew off chunks that later came together to form the moon.
Early Earth was spinning so quickly that a chunk of the planet broke off and became the moon.
The Earth and moon formed together at the same time. (it was always there)
The moon was originally a wandering proto-planet that got captured to become Earth's moon
Which of the following is NOT true about humans on planet Earth?
Humans have existed for about 100,000 - 200,000 years
Humans share ancestors with ancient mammals
Humans existed alongside the dinosaurs
humans share DNA and evolved from bacteria that existed billions of years ago.
What organism has been on Earth the longest?
fish
reptiles
plants
bacteria
Which of the following percentages is the closest approximation for how long humans have been on Earth when compared to the age of the planet? (Hint: Think about how much of your bluebook has humans on it)
100%. Humans have always been on Earth
10% of Earth's age
5%
Less than 1%
The Hadean eon came to an end about 4.0 billion years ago because...
a mass extinction occurred.
life arose on Earth.
the moon was born from a collision with a rogue planet.
an ice age had begun.
About 2,500 mya ago, Earth transitioned from the Archean eon to the Proterozoic eon because...
life arose on Earth.
oxygen was now present in a large amount in the atmosphere.
the first multicellular life arose.
an asteroid struck Earth to cause a mass extinction.
The ______________ was when life went from simple organisms to many diverse types of life.
Silurian period
Jurassic period
Cambrian explosion
mass extinction
An event where a large percentage of life on Earth died out is called a...
cataclysm.
pandemic.
mass extinction.
asteroid impact.
The giant supercontinent that formed about 280 mya was called...
Rodinia.
Panotitia.
Pangea.
Gondwanaland.
Pangea formed during the...
Paleozoiz era.
Mesozoic era.
Cenozoic era.
Cambrian explosion.
Pangea began to break up during the...
Paleozoiz era.
Mesozoic era.
Cenozoic era.
Cambrian explosion.
(T/F) For most of Earth's history, life existed ONLY in the oceans.
True
False
A nebula is...
a giant cloud of dust and gas in space.
when a star explodes and sends shockwaves throughout space.
the force of attraction between objects that is based on their masses.
the name given to the giant supercontinent that existed long ago.
The force of attraction between objects that is based on their masses is called...
the strong force.
the weak force.
electromagnetic force.
gravity.
