Changes in Global Temperature Over the Last 1

question 13

Multiple Choice

Changes in global temperature over the last 1.8 million years have been calculated by measuring

• A)the thickness of glacial deposits.
• B)the amount of carbon-14 in volcanic ash layers.
• C)the stable oxygen isotopes in shelly fossils.
• D)the amount of carbon dioxide in shelly fossils.

---

Definitions:

Mail Survey

A research method in which questionnaires are sent through the postal service to potential respondents, who are asked to complete and return them.

Questionnaire Data

Information collected from a series of questions asked to respondents, used for research purposes to gather data on opinions, behaviors, or characteristics.

Youth Culture

The ways in which young people conduct their lives, including their values, customs, and behaviors, often distinguishing them from other generational groups.

Watch Magazine

A publication dedicated to timepieces, covering topics such as new releases, reviews, and industry news.