Eratosthenes determined the circumference of earth by conducting an experiment. put his steps in order as they correlate to the scientific method. 1. state the problem: 2. make a hypothesis: 3. make observations: a) if the sun casts shadows at different angles at the same time of day in different places, we can determine how much earth curves. b) in syene, the sun's rays are vertical at noon. at the same time in alexandria, the rays are 7.2 degrees from the vertical. c) how can we prove earth is round and calculate its circumference?

Solution: The correct order is: C, A, B

The statement of the problem:

How can we prove Earth is round and calculate its circumference?

Hypotheis:

If the sun casts shadows at different angles at the same time of day in different places, we can determine how much Earth curves.

If the Earth was flat, the angle measured at different places at the same time of the day would be same.

Observation:

In Syene, the sun's rays are vertical at noon. At the same time in Alexandria, the rays are 7.2 degrees from the vertical.

a longitudinal wave moves energy that is to the direction of the wave’s movement. - true

the earths atmosphere is made up of nitrogen and oxygen. solids can turn into gasses through a process called sublimation. sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.

hope this : d