Rotation
axis
What is the imaginary line from the North to South poles?
What is geocentric?
The old idea that the Earth was the centre of the Solar System and everything else revolves around it.
The shape of the Earth
What is a sphere?
If the Sun has risen for a few hours in Sydney, what is the time of day in Perth?
Sunrise
Name the 4 seasons
Winter, Spring, Summer and Autumn
How many hours does it take for the Earth to complete one rotation on its own axis?
24 hours
What is heliocentric?
The current theory that the Sun is the centre of the Solar System.
What is earth's tilt?
23.5 degrees
Which direction does the Sun rise?
East
What is a winter solstice?
Least daytime in a year
How many days does it take for the Moon to orbit the Earth exactly? (hint: it's 29.5 days, a month, 30 days or 31 days)
29.5 days
What causes seasons?
Revolution and tilt of the Earth
How do we deal with the 1/4 day each year? Leap year is every four years and has one extra day
Leap year is every four years and has one extra day
What causes daytime and nighttime?
Earth's orbiting on its own axis around the Sun
Is this statement true or false: "Summer happens when the Earth is closer to the Sun and Winter is when the Earth is further away from the Sun." Explain why or why not.
False. Summer is when the hemisphere is inclining towards the Sun and Winter is when the hemisphere is pointing away from the Sun.
Why do we have 24 hours in a day?
24h for the Earth to complete an orbit on its own axis
Main cause of ocean tides on Earth.
Gravitational pull of the Moon on Earth
It separates the Northern Hemisphere from the Southern Hemisphere
What is the equator?
Planetory order from closest to furthest from the Sun.
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
2 factors of gravity
Mass and distance
There are exactly ______ days in a year because it takes ______ days for the _______ to orbit around the __________ .
365.25 days, the Earth, the Sun
Why are seasons repeated each year?
The Earth orbiting the Sun
What is a summer solstice?
Longest daytime in a year
How much of the Earth is in darkness or shade right now?
Half the earth
How will your weight change on the Moon, given that it has less mass than the Earth?
Your weight will be lighter, less mass less gravitational pull