The Big Bang is thought to have occurred __billon years ago

Can cool air hold more water vapor than warm air

Which statement describes how rays behave when they travel through media during reflection and refraction? During refraction, rays stay in the original medium, and during reflection, rays pass into a new medium.

How do your teeth work as a wedge?

Which characteristic is a physical property of wood? A. Wood can burn. B. Wood can rot. C. Wood does not rust. D. Wood is softer than coal.

Which of the following is not a reason fluorescent lamps are advantageous over incandescent lamps? A. Fluorescent lamps are more efficient than incandescent lamps. B. Fluorescent lamps operate at a higher temperature than incandescent lamps. C.

Whats the difference between population density and population size?

A standing wave is established in an organ pipe that is closed at one end. What is located at the open and closed ends of the pipe?

When all parts of a circuit are composed of conducting materials, the circuit is said to be A. parallel. B. closed. C. open. D. shorted.

You travel an an average speed of 20 km/h in a straight line to get to your grandmothers house. It takes you 3 hours to get to her house. How far away is her house from where you started?

A boat with an anchor on board floats in a swimming pool that is somewhat wider than the boat. Does the pool water level move up, move down, or remain the same if the anchor is (a) dropped into the water or (b) thrown onto the surrounding ground