Glacial Ice Cores Can Be Used to Determine the Atmospheric

question 44

Multiple Choice

Glacial ice cores can be used to determine the atmospheric concentration of CO₂ during Earth's history.How do scientists come up with these data?

• A)They use the thickness of the ice layers to determine how much CO₂ was in the atmosphere.
• B)The melt the ice and measure how much carbon was trapped in the ice.
• C)They record changes in the shape of ice crystals to determine the paleoclimate.
• D)They break the ice apart,release the air trapped in bubbles,and then measure the gases.

---

Definitions:

Securities Exchange Act of 1934

United States legislation that governs the trading of securities, such as stocks and bonds, to protect investors against fraud.

Purpose

The reason for which something is done or created, or for which something exists. It serves as a guiding principle in decision-making and strategy.

Registration Form S-4

A form used by a company for registering securities that will be exchanged in a merger or acquisition with the SEC.

Purpose

Purpose refers to the reason for which something is done or created, or for which something exists; it often drives the objectives, goals, and strategies of individuals and organizations.