Science Quiz – Test 2

Science quiz, test 2 of 19: 10 multiple-choice questions with answers. Try them, then play the interactive quiz on Zeno to earn XP.

Question 11

What is the chemical symbol for water?
- A HO2
- B O2H
- C H2
- D H2O
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Correct answer: H2O
Question 12

What is the primary component of the Earth's inner core?
- A Oxygen
- B Silicon
- C Iron
- D Nickel
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Correct answer: Iron
Question 13

What is the primary component of Earth's atmosphere?
- A Carbon Dioxide
- B Oxygen
- C Nitrogen
- D Hydrogen
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Correct answer: Nitrogen
Question 14

What is the chemical symbol for potassium?
- A K
- B Ka
- C P
- D Po
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Correct answer: K
Question 15

What is the most abundant element in the universe?
- A Hydrogen
- B Helium
- C Carbon
- D Oxygen
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Correct answer: Hydrogen
Question 16

What is the chemical symbol for sodium?
- A Na
- B K
- C S
- D Mg
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Correct answer: Na
Question 17

What are the two most abundant elements in the Earth's crust?
- A Oxygen and Silicon
- B Calcium and Magnesium
- C Iron and Aluminum
- D Sodium and Potassium
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Correct answer: Oxygen and Silicon
Question 18

What is the primary energy source for Earth's climate system?
- A The Sun
- B Geothermal energy
- C The Moon
- D Nuclear energy
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Correct answer: The Sun
Question 19

What is the most stable isotope of carbon?
- A Carbon-14
- B Carbon-11
- C Carbon-13
- D Carbon-12
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Correct answer: Carbon-12
Question 20

What is the atomic number of oxygen?
- A 8
- B 9
- C 7
- D 6
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Correct answer: 8

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