Gravity
Why do you come back down after jumping into the air?
Because gravity pulls you back down
What is a tide?
The rising or falling of the water in oceans and seas
Why do astronauts weigh less on the moon?
The moon has weaker gravity than Earth
TRUE OR FALSE: If an object has a lot of mass, it has a weak gravitational force.
FALSE: The greater the mass, the greater the gravitational force.
What is gravity?
An attractive force between two objects
What causes tides?
The gravitational pull of the moon and the sun
What keeps the moon in its orbit around Earth?
Earth's gravitational pull
What do astronauts weigh less on the moon?
The gravity is less on the moon than on the earth
What two things does gravitational force depend on?
Mass and distance
How often do tides occur?
Twice a day (two high tides and two low tides a day)
Why does the sun have some effect on tides even though it's far away?
It has a very large mass
What unit would you measure a person's mass in?
KG
Why is gravitational foce stronger at the poles of the Earth than the equator?
The Earth is not perfectly round, so you are closer to the Earth's center at the poles
What does tidal range depend on? (how drastic the tides are)
The positions of the sun and moon
What is gravity on the moon?
1.6 N/kg
What unit would I measure an elephant's weight in?
Newtons
What is the unit of measurement for gravity?
Newtons per kilogram N/kg
When would tides be the most extreme and why?
When the sun, moon and earth are alligned, because the sun and moons pull is combined.
What is the difference between mass and weight?
Mass- the amount of matter that an object contains
Weight - the force of attraction that the Earth or another planet exerts on an object.
Mass stays the same, weight changes depending on gravity.
mass is measured in kg, weight is measured in newtons
Which planet in our solar system has the highest gravity?
DOUBLE POINTS if you remember the N/kg of the planet
Jupiter
25.9 N/kg