Initial Question:
1) How long will it take the black worms to die off?
2) How much copper sulfate will kill the most black worms??
Follow-up questions:
1. Review your initial questions before starting the lab. Did you answer these after finishing the lab? Explain.
How long will it take the black worms to die off?
How much copper sulfate will kill the most black worms?
After finishing the lab my answer to question 1 was 10 minutes for the worms to start dying. My answer for question 2 was 0.01% of copper sulfate killed the most black worms
2. Look at the graph you made above of the % of blackworms that died at each concentration of copper sulfate. What is the LD-50 that you would calculate from this data?
The LD-50 I would calculate from this data would be 1%
3. How would your answer change if you were trying to determine the ED-50 (effective dose, or dose where 50% of the blackworms changed behavior)? Hint: Think about what concentration of copper made about half of the blackworms stop moving unless poked, etc...Is this value less than the LD-50? Why?
If I was trying to determine the ED-50 I'd say it would be 0% because at 0% none of the worms were moving, but as time went on, they all started to move.
4. If you were the policy-maker in charge of determining the highest level of copper that should be allowed in San Diego Bay, what concentration would you choose? Why?
If I had to determine the highest level of copper that should be allowed in San Diego Bay, the concentration I would choose 0.1% because I think it's better to not go over 1% and to stay under it.
1) How long will it take the black worms to die off?
2) How much copper sulfate will kill the most black worms??
Follow-up questions:
1. Review your initial questions before starting the lab. Did you answer these after finishing the lab? Explain.
How long will it take the black worms to die off?
How much copper sulfate will kill the most black worms?
After finishing the lab my answer to question 1 was 10 minutes for the worms to start dying. My answer for question 2 was 0.01% of copper sulfate killed the most black worms
2. Look at the graph you made above of the % of blackworms that died at each concentration of copper sulfate. What is the LD-50 that you would calculate from this data?
The LD-50 I would calculate from this data would be 1%
3. How would your answer change if you were trying to determine the ED-50 (effective dose, or dose where 50% of the blackworms changed behavior)? Hint: Think about what concentration of copper made about half of the blackworms stop moving unless poked, etc...Is this value less than the LD-50? Why?
If I was trying to determine the ED-50 I'd say it would be 0% because at 0% none of the worms were moving, but as time went on, they all started to move.
4. If you were the policy-maker in charge of determining the highest level of copper that should be allowed in San Diego Bay, what concentration would you choose? Why?
If I had to determine the highest level of copper that should be allowed in San Diego Bay, the concentration I would choose 0.1% because I think it's better to not go over 1% and to stay under it.