Percent Change and Carbon Dioxide Levels

The video tutorial explains how to calculate the increase in carbon dioxide levels from 1959 to 2018, using data from the U.S. Weather Bureau's station in Mauna Loa, Hawaii. It details the steps to find the increase in parts per million and the percent change, emphasizing the importance of understanding the difference between the beginning and ending amounts. The tutorial also covers converting the calculated change into a percentage, rounding it to the nearest tenth, and interpreting the results as an increase or decrease.

What was the initial measurement of carbon dioxide levels in 1959 at Mauna Loa?

• 350 parts per million

• 312 parts per million

• 290 parts per million

• 410 parts per million

What was the carbon dioxide level in 2018 at Mauna Loa?

• 350 parts per million

• 290 parts per million

• 312 parts per million

• 410 parts per million

How do you calculate the increase in carbon dioxide levels?

• Add the initial and final measurements

• Subtract the initial measurement from the final measurement

• Multiply the initial measurement by the final measurement

• Divide the final measurement by the initial measurement

What is the formula for calculating percent change?

• (final amount / initial amount) * 100

• (initial amount / amount of change) * 100

• (amount of change / initial amount) * 100

• (initial amount / final amount) * 100

What is the amount of change in carbon dioxide levels from 1959 to 2018?

• 98 parts per million

• 120 parts per million

• 100 parts per million

• 110 parts per million

What is the percent increase in carbon dioxide levels from 1959 to 2018?

• 31.4%

• 40.4%

• 35.4%

• 25.4%

How is the percent change converted from a decimal to a percentage?

• Divide by 100

• Multiply by 100

• Subtract 100

• Add 100

What does a positive percent change indicate?

• No change

• An increase

• A decrease

• A constant level

If the percent change is negative, what does it indicate?

• A decrease

• A constant level

• An increase

• No change

What should be done if the percent change indicates a decrease?

• Include the negative sign

• Ignore the negative sign

• Multiply by 100

• Add 100