Unit 3: Earth and Space
The Milky Way
What do astronomers call the stars in our solar neighbourhood?
Celestial Objects
What do astronomers study
They attract to one another
how much useful energy an electrical device produces compared with the amount of energy that was supplied to the device.
What is Efficiency?
2 000 000 - 15 000 000°c
What temperatures are found in the Sun?
Above the North Pole
Where is the North Star (Polaris) located?
it passes electricity through it and into the ground.
What does a lightning rod do?
Power (p) = Voltage (v) x Current (a)
How do you calculate power?
150 000 000 km
How many kilometres makeup 1 AU?
Mr. Galileo Galilei
Who was the first astronomer to observe sunspots in detail?
A larger form of measuring energy
what is a kilowatt?
Something that controls the movement of current
What is an electrical switch?
about 25 days
How long does it take for the Sun to rotate on its axis?
Gas Giants have this
Which planets have large orbital radii
The parallel circuit allows this
Which type of circuit allows for the flow of electrons?
they dont produce any light
What happens when a circuit is not complete?
The Northern and Southern Poles
What auroras are visible from where on the Earth?
Alignment of the Sun, the Moon and Earth
What is the cause of spring tides?
how do you make 3 batteries in a series, 6 bulbs parallel and a switch controlling the flow of all 6 lightbulbs
it heats up Mercury to vapour form which causes it to ionize.
how does a fluorescent lamp operate?