Guess the Legos

We are estimating populations in Science class. One good test is to see if you can guess how many objects are in a container. In my classroom there are Legos in a 1,000 mL. How many do you think are in the jar? Post your answer and you may be the lucky kid that wins the prize - getting to sit in Mr. Honer's desk chair for a class period!

Ecology Questions

You have learned about the factors that can cause a population of organisms to go up and down. You have also learned about the complex relationships that exists between organisms in their environments. Answer the following questions about ecology.
1.) What is the difference between a food web and a food chain?
2.) In the Food Web game you learned about a producer organism called kelp. What might happen to the rest of the food web if a disease suddenly killed most of the kelp?

Krusty Krabs Breath Mints

Read about the following experiment and answer the three questions at the end.

Mr. Krabs created a secret ingredient for a breath mint that he thinks will “cure” the bad breath people get from eating Krabby Patties at the Krusty Krab. He asked 100 customers with a history of bad breath to try his new breath mint. He had fifty customers (Group A) eat a breath mint after they finished eating a Krabby Patty.
The other fifty (Group B) also received a breath mint after they finished the sandwich, however, it was just a regular breath mint and did not have the secret ingredient. Both groups were told that they were getting the breath mint that would cure their bad breath. Two hours after eating the Krabby Patties, thirty customers in Group A and ten customers in Group B reported having better breath than they normally had after eating crabby patties.

1. What is the independent variable?
2. What is the dependent variable?
3. What were some of the control variables?