8.12 & 8.13

Why is LD50 an important measure in environmental science?

• It helps assess chemical safety.

• It measures air quality.

• It predicts weather patterns.

• It calculates water levels.

What do mutagens cause?

• Cancer

• Genetic mutations

• Flu

• Allergies

What does biomagnification refer to in the context of PCBs?

• Decrease in concentration through the food chain

• Increase in concentration through the food chain

• No change in concentration through the food chain

• Elimination from the food chain

Which of the following is not an effect of neurotoxins?

• ADD

• Learning disabilities

• Improved concentration

• Mercury poisoning

For how many days should the starting dose be taken?

• Days 1-3

• Days 1-5

• Days 1-7

• Days 1-10

What is the recommended frequency for taking the doses mentioned?

• Twice daily with food

• Once daily with food

• Three times daily with food

• Once weekly with food

What is the recommended dosage of junior strength 100 mg tablets for a child weighing 48-59 pounds?

• 1 tablet

• 2 tablets

• 2.5 tablets

• 3 tablets

What is the process called when a solute dissolves in a solvent to form a solution?

• Evaporation

• Solubility

• Filtration

• Condensation

What is the purpose of determining the concentrations of chemicals that harm organisms?

• To enhance the growth of organisms

• To assess the risks it poses to any organism

• To improve the taste of food

• To increase the lifespan of organisms

What is an example of a chronic study?

• Study of fish from hatchlings to adults

• Study of mice in a lab

• Study of plant growth

• Study of bird migration