What is a physical system

Why do see lighting from a distant storm before you hear thunder

How do sedimentary rock layers form

Kristen is creating a model of a galaxy. On a piece of paper, she draws many dots to represent stars. In order to make her model more accurate, she adds a key.

Which continent has rocks that are probably very similar in age and structure to the rocks along the east coast of the United States?

What are the two main factors that affect how quickly a coastline erodes

Below is information relating atmospheric pressure to altitude relative to sea level: The atmospheric pressure at sea level is 760 mmHg. The atmospheric pressure of the Dead Sea (0.40 km below sea level) is 800 mmHg.

Based on the map above, which of the following continents are the most developed? Note, the darker the shade of green, the more developed the region is. A. Africa and Australia B. North America and Europe C. Asia and South America D. Europe and Asia

Alexander Hamilton and Thomas Jefferson - Answer the following questions about each. 1. What role did they serve in George Washington's Cabinet?

In the united states and canada, the most common problem with using wood as a major heat source is

What is a type of air pollution