Quiz on "How Much Carbon Dioxide is Man Made?"

First name:

Last name:

Important Instructions for Taking Quiz

There are two kinds of questions those with circles in front of the answers and those with squares in front of the answers. The ones with circles have only one answer. The ones with squares can have more than one answer but might only have one answer. Lets say a question has 2 right answers and you check the correct boxes but you also check two boxes that are the wrong answer. You will get a score of zero on the question even though 2 of the answers were correct.

David Keeling became involved in measuring carbon dioxide because:

He was worried about global warming.
He was worried about global cooling.
He loved the great outdoors.
He was fascinated by geology.
He was fascinated by the study of climate

The Keeling curve shown in the first graph has squiggles in it. Why?

It's hard to get accurate measurements.
Every year carbon dioxide increases when plants shed their leaves
Plants convert carbon dioxide to oxygen and carbon containing compounds with photosynthesis in their leaves.
Plants don't consume carbon dioxide at night.

Fossil fuels contain

More carbon 14 than CO2 in the atmosphere because they are near the radioactive core of the earth.
Less carbon 14 than CO2 in the atmosphere because cosmic rays can't reach them.