The theory of gravity is considered to be a theory because

Venus has about the same mass as Earth and is about the same distance from the Sun. Yet Venus does not support life. An important difference between Earth and Venus is that Venus lacks A) an atmosphere. B) gravity and water.

Alex tested a substance that has a pH of 2. Which of the following could alex have tested? A) base B) salt C) water D) acid

Remy wonders if the height of the mountain has anything to do with the eventual size of the tsunami wave. How should Remy test this? A. Cause avalanches on several different mountains and see how large each resulting tsunami is. B.

According to the text, there is no energy shortage now, nor will there ever be. what reason (s) is given to support this statement?

Maddie Cat can ride her tricycle at a speed of 3.75 meters per second. How far can she go in 5.0 seconds

In the chemical reaction in which carbon, hydrogen and oxygen absorb heat and combine to form carbon dioxide and water which of the following is considered to be a reactant? A. heat B. water C. oxygen D. carbon dioxide

A box is at rest on a table. What can you say about the forces acting on the box? The upward ___ and the downward___ are balanced Applied force Frictional force Normal force Drag force Gravitational force Tension

When the sun warms the sidewalk on a hot sunny day, what type of energy conversion occurs?

Which statements about acceleration are true? Check all that apply. A. is the symbol used for acceleration. B. The SI units for acceleration are m/s. C. Acceleration is a scalar quantity. D. Acceleration is calculated with the equation.

What is the acceleration due to gravity on Mars? a. 9.8 m/s2 c. 12.2 m/s 2 b. 3.7 m/s2 d. 0.3 m/s2