The Earth, Sun and Moon
How many planets orbit our sun.
Nine planets orbit the sun.
Is it night time for all parts of the world at the same time?
No
Does the Sun move around the Earth?
No The Sun remains at the centre of the solar system
What holds the earth in its orbit around the Sun a) Speed b) Magnets c) The Sun's Gravity
The Sun's Gravity (Gravitational Pull)
Which part of the Earth is in daylight a) the part facing the sun b) the part facing away from the sun c) the part facing the moon
The part facing the Sun
waxing
The phases of the moon where the moon is gaining light
wanning
The phases of the moon where the moon is losing light
What causes the phases of the moon
The position of the moon relative to the position of the earth and the sun. Depending on where the sun and the earth is, the moon recieves different amounts of light
How long does it take for the Earth to rotate on its own axis ?
The time it takes the Earth to rotate once is called a day (24 hours). The actual rotation time is a little less, about 23 hours and 56 minutes.
The Earth goes around the Sun. True or False
True
How does the fact that the Earth's axis is tilted affect us?
We get seasons !
What causes a lunar eclipse
When the earth is positioned infront of the moon, blocking the light from the sun to illuminate the moon
Do you always see the same side of the moon
Yes
Is there a day and night on the moon?
Yes But a day on the moon is 28 Earth Days LONG!
Big Bang theory
all stars, galxies, and nebulas were in a small area, because of so much pressure it exploded, and the universe is still expanding from that explosion
Put in order of biggest to smallest - the Earth, the Moon and the Sun
1 Sun ( biggest) 2 Earth 3 Moon ( smallest )
How much of the moon is always lit by the sun
1/2
How long does it take the Moon to travel once around the Earth?
28 days Right! It takes about 28 days for the Moon to travel around the Earth.
What is the length of a full moon cycle
29.52 days
How long does it take the Earth to travel around the Sun once? a) 24 hours b) 28 days c) 365 days
365.25 days to be precise
We can see the moon
because light from the sun reflects off of it
Why do we have Day and Night?
As the Earth Rotate, the Sun shines on only one side of the Earth
Where is earth's northern axis pointing on the first day of winter
Away from the sun
Why does the moon seem to change its shape? Becuase a) It's cloudy b) It gets bigger and smaller beacuse of gravity c) we only see the part of the Moon that is lit by the Sun
Becasue we only see the part of the Moon that is lit by the Sun
Where is the Moon in its orbit when we can not see it at all
Between the Sun and the Earth or when it is on the opposite site of the Earth, e.g Australia
Which direction does the Moon travel around the Earth?
Counterclockwise
Comets
dust and frozen water
Seasons are caused by
Earth's tilt on it's axis
Night is dark because thick clouds cover the Sun.
False
The Sun is hidden behind the Moon at night. True or False
False
What force holds planets in their orbits?
Gravity holds Earth and the other planets in their orbits around the Sun.
Meteorite
Hits the earth
Where does the Sun appear to rise and set?
It rises in the East and it sets in the west
How Long Does it take the earth to orbit the Sun a) 28 Days b) 265 Days c) 365 1/4 Days
It takes 365 1/4 days for the Earth to Orbit the Sun
At what time of day would you expect to find the shortest shadow ? Why?
Midday The Sun is high in the sky
Is the Sun a planet?
NO The Sun is a Star
Give two reasons why it is colder in winter than in summer.
The Sun is lower in the sky and the days are shorter
What are the two ways in which the Earth is moving
Rotation around the axis and revolution around the sun
In which season are there most hours of sunshine?
Summer
What season is it in the Northern part of the world when the North bit is tilted towards the Sun ?
Summer
What Shape is the Earth, sun and other planets a) Flat b) Cone c) Spherical or ball shaped d) Square
The Earth, Sun and other Planets are Spherical or Ball Shaped
What does the Moon orbit around
The Moon orbits the Earth
How long does it take the Moon to orbit the Earth
The Moon takes about 28 days (27 days, 7 hours, 43 minutes, 11.6 seconds) to go all the way around the Earth and return to its starting position.
Is the moons gravitational pull stronger or weaker than the Earth's
The Moon's gravitational pull is weaker than the Earth's
Which is largest, the Earth, Sun or Moon?
The Sun
Giant impact theory
the most widley accepted theory on how to moon formed. It states that a mars sized object crashed into Earth which made the earth molten along with sending a huge amount of debris off of Earth. This debris eventually clumped into the moon