Eratosthenes determined the circumference of Earth by conducting an
experiment. Put his steps in order as they correlate to the scientific method.

Conduct an Experiment: Measure the angle of shadow at high noon
in Syene and Alexandria,
Make Observations: In Syene, the sun's rays are vertical at noon.

At
t the same time in Alexandria, the rays are 7.2 degrees from the
vertical.

Draw Conclusions: The angle represents the amount Earth curves
between Syene and Alexandria. This is 1/50 of a complete circle and
1/50 of Earth's circumference.

20 point pls brianliest 1. what does a red shift mean? blue shift? 2. describe the big bang theory. according to this theory, how old is the universe? 3. scientists believe the universe is expanding. what is the evidence that supports this? 4. describe a nebula. 5. describe the 3 types of galaxies. what is a barred spiral galaxy? 6. what is a light year? how far is alpha centauri from earth? 7. describe the universal law of gravitation. be sure to include gravitational force between two objects. 8. describe the planets’ orbits around the sun. 9. what is the asteroid belt? where is it located? 10. describe rotation and revolution of earth. what determines an earth day and year? 11. how do galaxies exist? 12. compare and contrast the inner and outer planets. 13. what causes the seasons?