Earth Science Quiz Answers and Explanations

Q1 Written Work 2

The size of the earth is how many kilometers in diameter? :Question 1Select one: a. 13,980 km b. 12,760 km c. 12,750 km d. 16,500 km

Does the mantle undergo convection :Question 2Select one: a. Yes b. No

The Big Bang Theory supposes that the universe is not expanding. :Question 3Select one: a. No b. Yes

Cisternae comprised Golgi Complexes.Question 4Select one: True False

When was the universe and solar system formed? :Question 5Select one: a. 4.7 billion years ago b. 6.7 billion years ago c. 50 billion years ago d. 4.6 billion years ago

Plasma is sometimes called the third state of matter. :Question 6Select one: a. Yes b. No

Photosynthetic organisms emit light for long periods of time.Question 7Select one: True False

The outer layer, or crust, is thinner than other layers. :Question 8Select one: a. Yes b. No

The earth is made up of mainly nitrogen and oxygen. :Question 9Select one: a. No b. Yes

The Moho is also known as? :Question 10Select one: a. Mohorivicic discontinuity b. Mohoravicis discontinuity c. Mohoravisis discontinuity d. Mohoravisik discontinuity

Here are the answers and explanations for your questions:

Question 1:

• Correct Answer: b. 12,760 km
• Explanation: The Earth's diameter is approximately 12,760 kilometers.

Question 2:

• Correct Answer: a. Yes
• Explanation: The Earth's mantle undergoes convection. Hotter, less dense material rises, while cooler, denser material sinks, creating a cycle of movement within the mantle.

Question 3:

• Correct Answer: a. No
• Explanation: The Big Bang Theory states that the universe is expanding. This expansion is supported by observations of redshift in distant galaxies.

Question 4:

• Correct Answer: True
• Explanation: Cisternae are flattened, membrane-bound sacs that are the basic structural units of Golgi complexes.

Question 5:

• Correct Answer: d. 4.6 billion years ago
• Explanation: The universe is estimated to have formed around 13.8 billion years ago. The solar system, including Earth, formed approximately 4.6 billion years ago.

Question 6:

• Correct Answer: a. Yes
• Explanation: Plasma is often referred to as the fourth state of matter, after solid, liquid, and gas. It's a superheated gas where electrons are stripped from atoms, creating a mixture of ions and electrons.

Question 7:

• Correct Answer: False
• Explanation: Photosynthetic organisms use light energy to produce their own food. They do not emit light for long periods. Some organisms, like bioluminescent creatures, emit light, but this is a different process.

Question 8:

• Correct Answer: a. Yes
• Explanation: The Earth's crust is the thinnest layer compared to the mantle and core.

Question 9:

• Correct Answer: a. No
• Explanation: The Earth's atmosphere is primarily composed of nitrogen (about 78%) and oxygen (about 21%).

Question 10:

• Correct Answer: a. Mohorivicic discontinuity
• Explanation: The Moho, or Mohorovičić discontinuity, is the boundary between the Earth's crust and the mantle. It was discovered by Croatian seismologist Andrija Mohorovičić.