Q3 Final test

What two factors will effect gravitational force?

• mass & weight

• mass & distance

• density & mass

• volume & distance

Answer explanation

Gravitational force is affected by mass and distance, not by weight, density, or volume. The force decreases with distance and increases with mass.

Imagine you're in a vast universe, floating between two objects. When do you think their gravitational pull on each other would be the WEAKEST?

• when the masses of both objects is small and the objects are snuggled up close

• when the masses of both objects is small and they're galaxies apart

• when the masses of both objects is large and they're practically hugging

• when the masses of both objects is large and they're on opposite ends of the universe

Answer explanation

The correct choice is when the masses of both objects are small and they're galaxies apart, as gravitational pull weakens with distance.

Which of these gravity facts is actually true?

• gravity is an attractive force that pulls objects together

• gravity makes objects repel like opposite magnets

• gravity only includes planets

• the moon is in a zero-gravity zone

Answer explanation

Gravity is the force that pulls objects towards each other, making this fact true among the given options.

What's the unit for measuring the force of gravity? 

• pounds 

• grams 

• newtons 

• kg/ m²

Answer explanation

The official SI unit for measuring the force that can push or pull objects is newtons.

Who is known for discovering the laws of gravity? 

• Einstein 

• Galileo

• Darwin

• Newton 

Answer explanation

Isaac Newton unlocked the secrets of the cosmos with the law of universal gravitation, making him the correct choice.

Imagine you're in the picture. Is the force of gravity making you float like a superhero or pulling you down gently? 

• Pulling me down gently

• Making me float like a superhero

Answer explanation

The correct choice is 'Pulling me down gently' because gravity pulls objects towards the center of the Earth, making them feel heavier rather than floating like a superhero.

Any object with mass is like a mini superhero because it has its own gravity!

• True

• False 

Answer explanation

The statement is true because any object with mass, no matter how small, has its own gravitational force, making it like a mini superhero in that sense.

What's the secret ingredient that tells you how much stuff an object is made of?

• force 

• mass

• weight 

• pressure 

Answer explanation

The secret ingredient that tells you how much stuff an object is made of is mass. Mass is a measure of the amount of matter in an object.

Imagine you're getting more massive, like you're turning into a giant! What do you think happens to the gravitational pull you exert?

• It gets stronger

• It gets weaker

• It stays exactly the same

• I'm not sure, maybe ask a wizard?

Answer explanation

As you get more massive, your gravitational pull increases due to the direct relationship between mass and gravitational force according to Newton's law of universal gravitation.

Which system pulls the two objects closer with a stronger gravitational force (if any)?

• System A

• System B

• Both systems give the same gravitational hug

Answer explanation

System B exerts a stronger gravitational force, pulling the two objects closer together.