The atoms have changed over time. Scientists think this is wrong. Why?

A) The nucleus is the center of an atom

B) An atom is a solid material

C) Electrons have a negative charge

D) Electrons are arranged in layers

How would the mass of an object be different if it were on the moon instead of on Earth? a. The mass would be the same on Earth. b. The object would not have mass on the moon. c. The mass would be less than it would be on Earth. d.

What planet is closest to the earth?

The 0 horizon in a soil profile is?

States that momentum cannot be created or destroyed

Which of the following is a true statement? A. Electric fields increase in strength as you move farther from the charge, but electric forces decrease. B. Both electric fields and forces decrease in strength as the distance increases. C.

If earth somehow expanded to a larger radius, with no change in mass, how would you're weight be affected? How would it be affected if earth shrunk?

Consider a helium balloon on a string tied to the seat of your stationary car. The windows are closed, so there is no air motion within the car. The car begins to accelerate forward. Which way will the balloon lean, forward or backward

The force of gravity acts upon meteors from the rocky asteroid belt between mars and Jupiter. Where is the force of gravity most likely to pull these meteors

Sally turns on her cellular telephone to speak to her friend who is located thousands of miles away. Which of the following best describes how such a telephone is able to transmit and receive information? A.

Calculate the gravitational potential energy relative to the ground when an 82 kg person climbs to the top of a 2.0 m stepladder.