ORBITS! - By Me.

1.31 Understand gravitational field strength 'g' and recall that it is different on other planets and the moon from that on the earth

Questions (roll mouse over to reveal answer)
What does small 'g' stand for in the equation W = mg?
What is approximate value of 'g' on Earth?
What is approximate value of 'g' on the Moon?
What are the units for 'g'?
Why is this equation useful?
Why is 'g' different on different planets?
Which object in our solar system has the largest 'g'?
Explain why this object has the largest 'g'
Where on a planet is 'g' the greatest?
What happens to the value of 'g' as you go further away from a planet?
How does this affect your weight?
Find your mass on the bathroom scales and then find your weight on different planets (click this link: http://www.exploratorium.edu/ronh/weight/), take a screen shot and upload the image to your blog

1.30

http://www.google.co.uk/imgres?imgurl=http://www.astronomy.org/programs/moon/earth-moon-size.gif&imgrefurl=http://www.astronomy.org/programs/moon/moon.html&usg=__HYO16qrm7yCajhGXxPze7bfJqSU=&h=487&w=650&sz=97&hl=en&start=0&zoom=1&tbnid=AomtdWJL63QnwM:&tbnh=156&tbnw=208&ei=GWaJTb_wJs-5ce78yKMM&prev=/images%3Fq%3DMoon%2Band%2Bearth%2Bcomparison%26hl%3Den%26biw%3D1366%26bih%3D624%26gbv%3D2%26tbs%3Disch:1&itbs=1&iact=hc&vpx=143&vpy=256&dur=924&hovh=194&hovw=259&tx=162&ty=88&oei=0GWJTYLCE42avAO80eyYDg&page=1&ndsp=15&ved=1t:429,r:5,s:0

QUESTIONS:

How was the Moon formed?

According to theory, the mood was formed from ejected pieces of debris after the earth suffered an impact from an object the size of Mars today about 4.53 billion years ago, when the molten earth was still cooling.

How old is the Moon?

The moon is about 4.5 billion years old, about the same age as the earth

Why does the Moon only show one side to us all of the time?

Because it rotates the opposite direction to the earth such that the same side is always facing the earth

The Moon is slowly drifting away from us, by how much per year?

3.8cm (1.5 inches) per year

Explain what will eventually happen to it

It will eventually be out of range of the earths gravitational pull, and be ejected into space

How much larger is the Sun than the Moon?

Sun is 416 times the size of the moon - could fit 72 million moons into the sun

What natural phenomenon does this ratio help to observe?

Transient Lunar phenomenon 

Insert a video (and source) of the answer to the question above

How far away is the Moon?

The distance fluctuates between 363,104 km and 405,696 km 

What was significant about the 19th March 2011 (regarding the Moon)?

There was an extreme supermoon. This was the closest the moon has been to the earth in 18 years

Why is there no atmosphere on the Moon?

Weak gravitational pull allows air atoms to escape resulting in no atmosphere

Why is the gravity on the Moon 1/6th than of Earth?

Because it's much smaller than the earth in comparison

How many people have stepped on the Moon? Who was the last?

12 of the 24 men sent have stepped on the moon, the last being Eugene Cernan

Why does the Moon orbit the Earth?

The earths gravitational pull is much greater

How many days does it take to orbit?

27.3 days

What effect does the Moon have on the Earth?

Effects the tides (low tide/high tide)

Insert a video (and source) of the answer to the question above

Other planets have moons, find images if those moons

How many moons are there in our solar system?

There are a total of 166 moons:
Mercury – 0
Venus – 0
Earth – 1
Mars – 2
Jupiter – 63
Saturn – 60
Uranus – 27
Neptune – 13

Michael NUMBA1