Space Flashcards
List all the phases of the moon
First quarter Waxing crescent New Waning crescent Last quarter Waning gibbous Full Waxing gibbous
What is gravity
An attractive force between all objects
What is mass
Amount of matter(in kg)
What is weight
Force due to the planets gravitational pull(in Newtons)
Does gravity push or pull
Pull
List the eight planets in order(closest to furthest from the sun)
Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune
What are the four inner planets made mostly up of?
Iron, nickel and rocks
What are the four inner planets
Mercury, Venus, Earth and mars
What are the 4 outer planets made mostly up of?
Gasses
What are the 4 outer planets
Jupiter, Saturn, Uranus, Neptune
What is the generalised name given to the outer planets
Gas giants
What are satellites
Objects that orbit planets
Fact:
Satellites can be man made or natural
Give 1 man made satellite
Sputnik 1
Give one natural satellite
Europa
What is a geostationary orbit
An orbit at the same speed as the planet rotates.
What is a polar orbit
Orbits around poles, whilst the planet spins underneath.
How do scientists believe the universe began
The Big Bang. Atoms jammed together and slowly stars began to form.
What evidence do they have to support this idea
An example is the microwave background.
Why is this a theory and not a fact
Because no one knows for sure.
How old are our galaxies
About 13.8 billion years old
What is a black hole
An area of such forceful gravity, that nothing can escape it.
What is a planet
An object that must do all of these three things; Orbit a star, be big enough to have enough gravity to keep a spherical shape and big enough that it’s gravity clears away any object of a similar size near its orbit.
What is a nebula
A giant cloud of dust and gas in space
