The Earth and beyond Flashcards
Describe what gravity is?
It is a force which attracts all masses
What is mass?
the amount of stuff in an object
What is mass measured in?
kg
What is weight?
It is a force
What is weight measured in?
newtons
Describe the difference between the mass and the weight of a kg of peanut butter on earth and on the space station
The mass 1 kg will stay the same in space and on earth
The weight of the peanut butter will be 9.8N on earth but almost nothing in space because there is very little gravity
What is at the centr of our solar system?
The sun
How many planets orbit our sun?
8
What is the order from the sun of the planets in our solar system
Mercury
Venus
Earth
Mars
Jupiter
Saturn
Uranus
Neptune
What is the main difference between a star and a planet?
Stars give out light and planets do not
What is a collection of stars called
A galaxy
Which galaxy is our solar system in?
The milky way
What is a solar system
A sun orbited by planets
What is a galaxy?
A large collection of stars
What is a light year?
It is the distance travelled by light in one year
How long does it take light to reach the earth from the sun?
8.3 minutes
What is the name of the 2nd closest star to the earth
Proxima centauri
How long does it take for light to reach the earth from the 2nd furthest star Proxima centauri?
4 years
How close are we to the sun?
150 million km
How long does it take the earth to rotate on it’s own axis?
24 hours
How long does it take the earth to orbit the sun?
365 and 1/4 days