Question

arth is currently in an interglacial period.(1 point)
Responses

True
True

False
False
Question 2
Climate has changed naturally over Earth's history(1 point)
Responses

True
True

False
False
Question 3
The increase in carbon dioxide since the year 1860 is similar to past increases.(1 point)
Responses

True
True

False
False
Question 4
Drag the items to the correct location.(1 point)
Put responses in the correct input to answer the question. Select a response, navigate to the desired input and insert the response. Responses can be selected and inserted using the space bar, enter key, left mouse button or touchpad. Responses can also be moved by dragging with a mouse.
Earth's most recent glacial period ended about Response area years ago. The Great Oxygenation Event began about Response area years ago. About Response area years ago carbon dioxide began increasing exponentially to unprecedented levels.​​​​​​​
Question 5
Select the correct answer from the list.(1 point)
Between 400,000 years ago until 1950, the levels of carbon dioxide in the atmosphere never exceeded
parts per million. Today, carbon dioxide levels have exceeded
parts per million.

Answer 1

Here are the answers to your questions:

**Question 1:** Earth is currently in an interglacial period.
**Response:** True

**Question 2:** Climate has changed naturally over Earth's history.
**Response:** True

**Question 3:** The increase in carbon dioxide since the year 1860 is similar to past increases.
**Response:** False

**Question 4:**
- Earth's most recent glacial period ended about **12,000** years ago.
- The Great Oxygenation Event began about **2.4 billion** years ago.
- About **150 years** ago, carbon dioxide began increasing exponentially to unprecedented levels.

**Question 5:**
- Between 400,000 years ago until 1950, the levels of carbon dioxide in the atmosphere never exceeded **300** parts per million.
- Today, carbon dioxide levels have exceeded **400** parts per million.

Feel free to ask if you have any more questions!