Question

drag the item to the correct location. (2 points)
earths most recent glacial period ended about
years ago.
the great oxygenation event began about
years ago.
about
years ago carbon dioxide began increasing exponentially to unprecedented levels.
2.3 billion 11,500 160

Explanation:

Step1: Recall glacial period end time

Earth's most recent glacial period (the last ice age) ended around 11,500 years ago. So match "11,500" to the first blank.

Step2: Recall Great Oxygenation Event time

The Great Oxygenation Event began about 2.3 billion years ago. So match "2.3 billion" to the second blank.

Step3: Recall CO₂ increase time

Carbon dioxide began increasing exponentially (due to industrialization) about 160 years ago. So match "160" to the third blank.

Answer:

• Earth's most recent glacial period ended about $\boldsymbol{11,500}$ years ago.
• The Great Oxygenation Event began about $\boldsymbol{2.3}$ billion years ago.
• About $\boldsymbol{160}$ years ago carbon dioxide began increasing exponentially to unprecedented levels.