which of the following drives the movement of convection currents

A. pressure differences

B. density differences

C. volume differences

How many gallons of water per day does the average American family of 4 use? A). 80 gallons b). 160 gallons C). 240 gallons D). 320 gallons

The long heavy tail of a spider monkey enables the monkey to easily vary its a. center of gravity. b. weight. c. momentum. d. inertia. E. none of the above

How many galaxies exist?

How do positive charges in solids versus positive charges in liquids vary when it comes to the flow of electric charge?

a scientist designs an experiment that requires two atomic particles whose only fundamental force exerted between them is the gravitational force. Which combination of particles and separation distance will meet this condition?

A 200 watt t. v. is used for 20 hours in a week. If it is used for four weeks then what is cost of electricity if rate is 5rs/kwh

In an experiment, the control is never changed by the scientist not important to the scientist not recorded by the scientist changed by the scientist

When you catch a baseball, what kind of work do you do, negative or positive? by catching the ball, what do you change? what energy does it gain or lose?

All describe work except A) a team of dogs dragging a sled B) a jokey sitting on a horse C) a bowler lifting a bowling ball

Who is known as the father of toxicology