SOCSCI 8.QUIZ.003.ATMOSPHERE AND HYDROSPHERE

Student Name (LAST, FIRST MI.):

Student Number:

Subject:

• GE 6
• GE 6

Days:

• MWF
• TTH
• SAT

Time Start:

Time End:

Contact Number:

What is the primary gas present in Earth's atmosphere?

• Nitrogen
• Oxygen
• Carbon dioxide
• Argon

Which layer of the atmosphere helps protect life on Earth by absorbing harmful UV radiation?

• Troposphere
• Stratosphere
• Mesosphere
• Thermosphere

What is the approximate percentage of oxygen in Earth's atmosphere?

• 0.21
• 0.31
• 0.41
• 0.51