Eratosthenes Measured the Circumference of the Earth by

question 23

Multiple Choice

Eratosthenes measured the circumference of the earth by

• A)figuring an angle as a fraction of the total circumference of the Earth.
• B)traveling half of the earth and multiplying by 2.
• C)observing shadows on the moon through a magnifying glass.
• D)meditating in a dark cave.

---

Definitions:

Threatened Species

Species that are at risk of becoming endangered in the near future throughout all or a significant portion of their range.

Greenhouse Gas

Gases in Earth's atmosphere that trap heat, including carbon dioxide, methane, nitrous oxide, and fluorinated gases, contributing to global warming.

Methane

A colorless, odorless flammable gas that is the simplest alkane and a major component of natural gas, contributing to greenhouse gas emissions.

Deforestation

The large-scale removal of trees from forests or woodlands, often resulting in loss of biodiversity and environmental disruption.