Spheres of Earth — Unit test Answers
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Which statement describes competition within a population?
A
Several killer whales migrate to a new location.B
Two male sea horses fight to win over a female.C
Several elk travel together to find and share water.D
Different kinds of garden plants take in water from the soil.22
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Which important event in Earth’s history occurred during the Jurassic period?
A
The first birds emerged on Earth.B
Mammals were in search of food.C
Animals with shells emerged on EarthD
Treelike ferns first began to grow and populate.23
Which phrase describes one main feature of the atmosphere?
A
protects Earth’s surfaceB
includes organisms in the air, on land, and in waterC
consists of rocks, minerals, landforms, and Earth’s interiorD
comprises oceans, lakes, rivers, streams, and groundwater24
Which period belongs to the Paleozoic era and not the Cenozoic era?
A
DevonianB
NeogeneC
PaleogeneD
Quaternary25
Which statement describes abiotic factors in an environment?
A
Chickens run around a farm.B
Soil retains water and nutrients.C
Bacteria use energy to reproduce.D
Plants compete for sunlight in an ecosystem.26
The image shows sedimentary rock layers.
A
1B
2C
3D
427
Which best explains how scientists confirmed that the moon formed around the same time as Earth?
A
Scientists determined the approximate age of fossils from the moon and Earth.B
Scientists used radioactive dating to study the age of material from the moon and Earth.C
Scientists explored the cycle of condensation and evaporation over time on the moon and Earth.D
Scientists analyzed the content of gases that were part of the atmospheres on the moon and Earth.Did you find these answers helpful?
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