The Greek philosopher Democritus coined what word for a tiny piece of matter that cannot be divided?

A) Element

B) Atom

C) Electron

D) Molecule

One of the methods used to reduce energy use is: a. energy efficiency c. energy conservation b. energy reservation d. energy holding

Summary on how solar energy works

The term "angle of deviation" is used in reference to a/an A. lens. B. polarizer. C. analyzer. D. prism.

How is velocity different from speed? A - Velocity is based on distance. B - Velocity includes direction. C - Velocity can be an average or instantaneous.

Do stars that look brighter in the sky have larger or smaller magnitudes than fainter stars?

Forces of attraction limit the motion of particles most in

What is the temperature of the center of the earth?

A certain string has a mass of 120 g and a length of 40 cm. Consider the quantity 3 = 120/40. 1. Give the name of the quantity if there is one. 2. What is the interpretation of the quantity in this context? 3.

Four fundemental forces from weakest to strongest

Which of the following is a correct principle of relative-age dating? A. In undisturbed rock layers, the youngest rocks are on the bottom. B. Rock-forming materials are deposited in horizontal layers, though they may be tilted later. C.