GRAVITY
What is gravity?
Gravity is a force that pulls objects toward each other.
What is mass?
Mass is the amount of matter in an object.
Which changes when you travel to the Moon: your weight or your mass?
Your weight changes.
What colour does the Sun appear to us from Earth?
Yellow
How many planets are in the Solar System?
Eight.
Where does gravity pull objects toward on Earth?
The Earth's center.
What unit is used to measure mass?
Kilograms, abbreviated as kg.
How are mass and weight related?
Weight is mass multiplied by gravity.
True or False: The Sun is the centre of the Solar System.
True
Name the four inner (rocky) planets in order
Mercury, Venus, Earth, and Mars
What is the unit of measurement for weight?
Newtons, abbreviated as N.
True or False: Your mass is the same on Earth and the Moon.
True, mass doesn’t change with gravity.
If your mass is 50 kg on Earth, what will it be on the Moon?
50 kg, because mass doesn’t change.
What is the Sun?
The Sun is a star at the centre of our Solar System.
Name the four outer (gas giant) planets in order.
Jupiter, Saturn, Uranus, and Neptune.
True or False: Gravity only works on Earth.
False, gravity exists everywhere in the universe.
Does mass depend on gravity?
No, mass is independent of gravity.
What happens to your weight if you travel to a planet with stronger gravity than Earth?
Your weight increases.
What kind of energy does the Sun provide (give) to Earth?
Light and heat energy
Which planet is the largest in the Solar System?
Jupiter
Which scientist is famous for discovering the law of gravity?
Sir Isaac Newton
Write the formula to calculate mass.
Mass = Weight / Strength of gravity or M =W / g
Write the formula to calculate weight.
Weight = Mass × Gravitational acceleration or W = m × g
How does the Sun’s gravity affect the planets?
It keeps them in orbit around the Sun.
Which planet is known as the "Red Planet"?
Mars