Count stars Lab : Procedure : 1. Draw a grid of twenty squares on a piece of pap
ID: 299146 • Letter: C
Question
Count stars Lab :
Procedure :
1. Draw a grid of twenty squares on a piece of paper. Each square should measure 5cm on a side. The Final Grid will be 25cm long and 20cm wide.
2. Randomly scatter one table spoon of white rice over the grid.
3. Select the three squares and count the number of rice grains either completely within each square or partly touching its rightside or botom.
4. calulate the average number in three squares and multiply the average by 20 .
Data Results :
Grid 1 : 28
Grid 2 : 35
Grid 3 : 40
Average = 34.33
Explain :
How might this process model the technique astronomers use to count the number of stars in the sky??
Explanation / Answer
Stars in the sky cannot be counted as they are available in large amount that is infinity. In this simple technique of square grid, we spray the rice randomly and take any three or more squares into account. Similarly,the sky is the square grid while the rice thrown in the square grid represents the stars in the sky. As we take into account any 3 squares and count the rice particles in it,similarly astronomers take into account a particular area of sky and calculate the average stars in the particular area,and thus assume it to be a constant in all other areas of the sky.