Bell Work-5th Nov 17

A ball falling back to the ground is an example of which force?

• magnetism

• gravity

• electricity

• attraction

Without gravity we would________. 

• Float away
• Stay in the ground
• Nothing would happen.
• I don't know

What keeps the planets in orbit around the sun?

• gravity

• friction

• density

• distance

A boy throws a baseball up in the air. Why does the baseball fall back down to the ground?

• the mass of the baseball decreases, causing it to fall

• the weight of the ball causes the ball to fall

• the force of gravity causes the ball to fall

• the density of the ball causes the ball to fall

Who was the person who realized that there was an invisible force called gravity?

• Isaac Garza

• Albert Einstein

• Isaac Newton

• Mrs. Nutt

Why does the lower part of the child appear so much different in size from the upper part?

• The light rays that travel through water and then into air are enlarged.

• The light rays that travel through water and then into air are refracted.

• The light rays that travel through air and then into water are reflected.

• The light rays that travel through air and then into water are reduced.

The diagram above shows a light ray as it strikes an object. Based on the way the light rays travel, the object in the diagram is MOST LIKELY —

• an eyeglass lens

• a mirror

• a window

When conducting an experiment, in order to get reliable results, it is important to:

• Disregard results that do not match your hypothesis
• Test many different variables at the same time
• Test all forces at the same time
• Repeat the investigation several times

When light travels through air into a prism, it bends and separates into many colors.

In which other situation does light bend?

• When light moves through air into water

• When light hits a wall

• When light passes through outer space

• When light hits a mirror

Janet wanted to test whether the large marble or the small marble would roll farther. She set a ramp up to the height of 18 inches. She placed the small blue marble at the top and released it. She measured the distance it traveled at 8 feet. She followed the same procedure with the large green marble. She measured the distance it traveled at 6 feet.

What is the variable in Janet's experiment?

• the ramp

• the marbles

• the distance the marbles travelled