EARTH SCIENCE SUMMATIVE TEST

Which theory suggests that the universe will expand, contract, and then expand again?

• Nebular Theory

• Encounter Theory

• Big Bang Theory

• Oscillating Universe Theory

Which theory proposes that the solar system originated from a cloud made up of dust and ionized particles?

• Nebular Theory

• Encounter Theory

• Oscillating Universe Theory

• Big Bang Theory

Which theory suggests that the universe started as a singularity with very high temperature and density?

• Oscillating Universe Theory

• Big Bang Theory

• Nebular Theory

• Encounter Theory

Which theory posits that planets formed from material ejected from the sun during an encounter with another celestial object?

• Encounter Theory

• Nebular Theory

• Big Bang Theory

• Oscillating Universe Theory

Which theory predicts a scenario similar to what is speculated to occur in black holes?

• Oscillating Universe Theory

• Big Bang Theory

• Nebular Theory

• Encounter Theory

What percentage of the hydrosphere is comprised of saltwater?

• 97.5%

• 80%

• 90%

• 75%

Where can freshwater be found?

• Only in oceans

• Only in rivers

• In rain and snow, rivers, lakes, and glaciers

• In deserts

What is the main feature of the stratosphere that protects Earth from harmful UV radiation?

• Ozone layer

• Helium

• Carbon dioxide

• Hydrogen

Which layer of the atmosphere is characterized by a minimum temperature of roughly -85 degrees Celsius?

• Exosphere

• Thermosphere

• Troposphere

• Mesosphere

What is the main gas found in the exosphere?

• Carbon dioxide

• Nitrogen

• Oxygen

• Hydrogen