Craters Investigation
In this experiment I am going to investigate one factor that causes
craters to be different sizes. I am going to do this by dropping a
ball bearing with a mass of 63.7g, from varying heights into a tub of
sand and then measuring the width of the crater it made.
Research
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On the Moon, craters usually measure up to 200 (320 miles) or more in
diameter. Meteorites hitting the lunar surface at high velocity
produced most of the large craters. Many of the smaller ones - those
measuring less than 1km (0.6 mile) across could have been formed by
explosive volcanic activity.
Many craters have a surrounding ring: this is usually quite low
although a typical one may be about 1500m (4920 feet) above the
surrounding landscape. In many cases, there is a central peak or
several peaks within a crater.
The darker areas of the Moon, known as Maria, have relatively few
craters. They are thought to be huge lava flows that spread over an
area after most of the craters have already been formed.
Apparatus
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á 1 Tub of sand
á 1 Ruler
á 1 Metal Ball Bearing (63.7g)
á 1 Metre Ruler
Method
1. Set up the apparatus (as shown in the diagram)
2. Lift the Ball Bearing to a height of 10cm and drop into the tub of
sand.
3. Place the end of the ruler at one edge of the crater and measure to
the other side. This gives the width of the crater.
4. Repeat steps 2 and 3 at 10cm intervals (20cm, 30cm etc) up to
100cm.
5. Repeat 3 times
6. Record in Results Table
Fair Test?
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The factors, which would affect the size of a crater, are:
á The mass of the ball bearing because if it was heavier then the
amount of G.P.E it has would increase due to the fact that the
These pebbles were picked out randomly. We took 100 pebbles from each end and measured their length using a ruler and used the shape chart to decide what shape the pebbles were. First we had go... ... middle of paper ... ... ehicle.
[8.3] In what ways do you think your results would have been different if you had sampled at a different height on the rock?
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