An eclipsing binary system has a primary eclipse (star A is eclipsed by star B) that is deeper (more light is removed from the light curve) than the secondary eclipse (star B is eclipsed by star A). What does this tell you about stars A and B?

What is sustainable development?

Why can't we destroy bothersome pollutants by just dissolving them in the ocean?

Which word describes a group of islands? F Annex G Appellation H Aquarelle J Archipelago

What happens at plate boundaries between oceanic and continental plates?

The Soviet Union was the world's first communist nation. True False

Why has there been little progress negotiating agreements between riparian countries and those in need of water? No one wants to share limited resources. Countries do not want to negotiate with historic rivals.

What are the best places to go in Hamburg Germany?

Ancients noticed patterns in the motion of objects in the sky, which led to the development of units of time, like hours, days, weeks, months and years. Which of the following moves least in the sky regardless of the time period being considered?

Observations indicate that galaxies with more massive central black holes tend to also have

If there is a subduction zone, you would expect to find volcanoes. Locate and name the volcanic mountain range (on the North American continent) and list the names of two specific mountains.