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