seciton+2+-+Risk+assessment

go back to home:tegan imbert **__ Section 3 – Risk assessment __**
 * __ Our __****__ Investigation __**
 * In Our investigation we were testing the effect on crater size of dropping objects from different heights. **


 * Independent variable: Height **
 * Dependant variable: size of crater. **
 * Control variable: Mass, smoothness of maize **
 * Mass of ball:48.17g **

· **Firstly, we filled the pan with maize flour using a sieve and we smoothed it out. ** · **Then, we measured out the height and dropped the ball from that height (starting at 25 cm). ** · **When we dropped the ball we measured the size of the crater it created. ** · **After that we smoothed out the surface again and repeated the experiment 5 more times. **  **The size of a crater caused by an impactor of 10 X the velocity of you highest drop?**
 * Method: **
 * __A table / graphs to show the results of our experiment __**
 * __ Investigation interpretation __**
 * What does our data reveal about the relationship between crater size and impactor velocity? **
 * After carrying out our experiment we have come to the conclusion that the higher you drop the ball the bigger the crater size. **

**2. List the ways in which your simulated impacts cannot properly represent actual meteorite impacts on a planet?** <span style="color: #99ccff; font-family: 'Arial Rounded MT Bold','sans-serif'; font-size: 12pt;">**3. estimate the size of crater caused by impacts of meteorites of diameter:** **__Effects of impacts on Earth__** · **<span style="font-family: 'Arial Rounded MT Bold','sans-serif'; font-size: 12pt; font-style: normal; line-height: 120%;">The shock wave from the crash landing would travel at 30,000 kilometers. The space rock is destroyed by the heat of impact and a jet of vaporized stone blasts a hole in the atmosphere. High in the air the vaporizing stone cools and condenses, falling back to earth as millions of tiny stones. As they stream to the ground in the next hour they heat up and their glow turns the sky pink. ** · **<span style="font-family: 'Arial Rounded MT Bold','sans-serif'; font-size: 12pt; font-style: normal; line-height: 120%;">Worse still the original explosion blasts billions of tons of debris into the air. The dust is carried around the world, blacking out our planet for centuries ** __**Frequency and power of impact events**__ <span style="font-family: Symbol; font-size: 12pt; font-style: normal; line-height: 120%; msolist: Ignore;">· **<span style="font-family: 'Arial Rounded MT Bold','sans-serif'; font-size: 12pt; font-style: normal; line-height: 120%;">The meteoroids are assumed to be fragments of comets or asteroids. The fragments self destruct as they hit the Earth’s upper atmosphere at high speeds. ** <span style="font-family: Symbol; font-size: 12pt; font-style: normal; line-height: 120%; msolist: Ignore;">· **<span style="font-family: 'Arial Rounded MT Bold','sans-serif'; font-size: 12pt; font-style: normal; line-height: 120%;">The energy of impact of such a meteoroid is equal to a bomb of n20 000 tones of TNT- greater than the atom bomb dropped on Hiroshima in 1945. ** <span style="font-family: Symbol; font-size: 12pt; font-style: normal; line-height: 120%; msolist: Ignore;">· **<span style="font-family: 'Arial Rounded MT Bold','sans-serif'; font-size: 12pt; font-style: normal; line-height: 120%;">136 air busts were detected between 1975 and 1992, an average of 8 impacts each year. It is estimated that 80 meteoroids explode, in the upper atmosphere each year with energies greater than 1 kiloton. **<span style="font-family: 'Arial Rounded MT Bold','sans-serif'; font-size: 12pt; line-height: 120%;">
 * __ Investigation discussion __**
 * <span style="color: #99ccff; display: block; font-family: 'Arial Rounded MT Bold','sans-serif'; text-align: left;">1. Which common features of real impact craters did not in you simulated collisions? ****<span style="font-family: 'Arial Rounded MT Bold','sans-serif';">The common features of real impactor craters that didn’t happen in our experiment are ****<span style="font-family: 'Arial Rounded MT Bold','sans-serif';"> there nothing weren’t destroyed, ****<span style="font-family: 'Arial Rounded MT Bold','sans-serif';">in our experiment the ****<span style="font-family: 'Arial Rounded MT Bold','sans-serif';">meteor was hit the ****<span style="font-family: 'Arial Rounded MT Bold','sans-serif';">maize flower ****<span style="font-family: 'Arial Rounded MT Bold','sans-serif';">. **
 * <span style="font-family: 'Arial Rounded MT Bold','sans-serif';">The ways in which our experiment was different to real life is that ****<span style="font-family: 'Arial Rounded MT Bold','sans-serif';">there ****<span style="font-family: 'Arial Rounded MT Bold','sans-serif';"> was maize flour as the surface and when a real crater is occurring, it lands on the ground. As the ground is a much harder surface than maize flours this cannot be exact. The craters we used where not extracts from real crater so there for were not made from the same thing. **
 * <span style="font-family: 'Arial Rounded MT Bold','sans-serif';">A) If a meteor a diameter of 100m the crater size would be 400m. **
 * <span style="font-family: 'Arial Rounded MT Bold','sans-serif';">B) If a meteor was had a diameter of 1KM the crater size would be 4000m. **
 * <span style="font-family: 'Arial Rounded MT Bold','sans-serif';">C) If a meteor was had a diameter of 10KM the crater size would be 40000m. **