Imaginary lines
What is the single horizontal imaginary line that cuts earth in half?
The equator.
How long it takes for a full revolution of the earth around the sun?
365 days (+6 hours)
What are the 2 main gases in the atmosphere?
Oxygen and nitrogen
Who studies the stars, planets, moons and other objects in space?
Astronomers.
Which way does the Earth spin, clockwise or anti-clockwise?
Anticlockwise
What are the 2 poles?
North Pole and South Pole.
What are the four seasons?
Winter, spring, summer and autumn
What are the 3 main parts of the geosphere?
The crust, the mantel and the core
When did first astronomers found out that the was a sphere?
Ancient history.
If it is winter in Spain now, what season is it in Australia?
Summer
What are parallels?
They are imaginary horizontal lines that goes around the Earth.
Why do we have day and night?
Because when the Earth rotates, parts of it will face the sun and the other part won't.
What are the 3 main parts of our planet?
The geosphere, the hydrosphere and the atmosphere.
What do we use to look into space?
Telescopes.
If you split Earth from the equator you will have 2 halves, what are the name of these 2 parts?
Northern hemisphere and Southern hemisphere.
What is the 0° meridian?
Greenwich meridan.
Why do we have leap years?
Because it takes 365+1/4 days for a full revolution. We only count 365 days on normal years, but every 4 years we add up the all the hours we missed totally 1 day
What is magma?
Very hot molten (semi-liquid) rocks that is underground.
Or
Lava underground.
Name a planet we can only see using a telescope.
Uranus and Neptune.
We can see the other planets without using a telescope!
What time is it in Japan right now?
Tip: They are many hours ahead
+ 8 hours
Example if it is 1:00pm in Spain then it is 9:00pm in Japan.
How do we get the geographic coordinates of a location?
By combining the longitude and latitude measurements.
Why do we have seasons?
Because the Earth's axis is tilted and when it goes around the sun, the northern or southern hemisphere is closer to, or further away from sun.
What is the core made of?
Mostly iron, some heavy liquid rocks
How did we first realise the Earth is not flat?
They realise the Earth's shadow on the moon was round (sphere) and how the Earth's curvature made objects visible from high grounds where it wasn't visible on lower places.
Why are modern telescopes are in space or on top of high mountains?
It is clear from all the light pollution from Earth (E.g Street lights), is above most clouds, and has less disturbance from the atmosphere.