Know It All Friday - 8th Science - 2/18

Differences in the moon's and sun's pull on different sides of the Earth cause _________.

• gravity
• lunar phases
• tides
• dabbing

As the distance between 2 objects increases, what happens to gravitational force?

• It increases.
• It decreases.
• It stays the same.
• Only Mr. Silvio knows what will happen.

How long will an object remain at rest, according to Newton's First Law of Motion?

• it can't rest
• until noon
• until an unbalanced force occurs
• as long as there are unbalanced forces acting on it 

For every _______ there is an equal and opposite ________. 

• reaction, action
• action, action
• reaction, reaction
• action, reaction

Which is the best example of Newton's First Law of Motion?

• a basketball thrown in the air falls to the ground
• a soccer ball remains motionless until it is kicked by a player
• a baseball player swings at an approaching ball
• an ice skater pushes back from a wall and moves backwards

With unbalanced forces, the object will move in the direction of the _______ force.

• larger 
• smaller 
• equal 

The amount of matter in an object is 

• pressure
• weight
• mass
• force

A person would weigh less on on the Moon than on the Earth because . . .

• Moon has more mass, and therefore more gravity
• Moon has less mass, and therefore more gravity
• Moon has more mass, and therefore less gravity
• Moon has less mass and therefore less gravity

How is Earth's magnetic field similar to that of a magnet?

• It's shaped like a horseshoe.
• It has north and south poles.
• It is made plastic.
• It is hundreds of miles long.

What is the net force?

• 20 N 
• 0 N 
• 400 N 
• 40 N