1. Writing Prompt 9/6/06 9/6/06 If I had a bag with 3 blue marbles and 3 red marbles in it, what is the probability that you could reach in and grab a blue one without looking at them? If I had a bag with 3 blue marbles and 3 red marbles in it, what is the probability that you could reach in and grab a blue one without looking at them? If you removed 1 blue marble what is the probability now of you getting a blue one? If you removed 1 blue marble what is the probability now of you getting a blue one?

2. Probability How did we find experimental probability? How did we find experimental probability? Divided # of shots made by total shots taken Divided # of shots made by total shots taken How did we find theoretical probability? How did we find theoretical probability? Divided area of the target by the total area Divided area of the target by the total area

3. Probability How do we find the theoretical probability of heads or tails when flipping a coin? How do we find the theoretical probability of heads or tails when flipping a coin? What is it? What is it? How would we find experimental probability with flipping the coin? How would we find experimental probability with flipping the coin? Let’s try it Let’s try it

4. Indirect Measurement

5. How big in meters do you think an atom is? How big in meters do you think an atom is? 10 -10 m = 0.0000000001 m 10 -10 m = 0.0000000001 m That’s INCREDIBLY small!!! That’s INCREDIBLY small!!!

6. Indirect Measurement Can we see atoms with our eyes? Can we see atoms with our eyes? No we cannot… No we cannot… So how do we measure things we can’t see? So how do we measure things we can’t see?

7. ??? We measure things we can’t see with a process called… We measure things we can’t see with a process called… INDIRECT MEASUREMENT INDIRECT MEASUREMENT

8. Indirect Measurement A process of measuring that involves direct measurement and probability A process of measuring that involves direct measurement and probability So, we use some measurements that we know and fill in the holes with probability information So, we use some measurements that we know and fill in the holes with probability information

9. Activity time Let’s see how it works!!! Let’s see how it works!!!