Answer:
absolute brightness
Explanation:
The observational fact about a cepheid variable star that leads to a measurement of its distance from earth is that its period of variation is directly related to its absolute brightness
Answer:
Since neither reptile could have swum great distances across salt water he inferred that they once lived on a single landmass that has since split apart.
Answer:
oIs it two options? If so the answers are D and E. If it's not then I'm not sure because they are both similar to the exact same thing. ( Sorry I couldn't be more help)
Explanation:
Answer:The five themes of geography are location, place, human-environment interaction, movement, and region. These themes help us understand how people and places are connected in the world. Geographers use the five themes to help them study the world and organize ideas.
Explanation:
hope that helps <3