Show:
Hazards
More Hazards
Even More Hazards
Experiment Design
100
Ebola is an example of what kind of hazard?
What is a biological hazard?
100
Smoking cigarettes are an example of what kind of hazard?
What is a social hazard?
100
DDT is an example of this kind of hazard.
What is a chemical hazard?
100
During gym class Sally noticed that her friend Melissa always ran faster than her. Sally knew that they exercised equally, so she wondered what could cause Melissa to run so fast. Sally began to compare herself and Melissa to see what could cause the difference in speeds. She noticed that Melissa was taller and wondered if height affected speed. What is the testable question that Sally is trying to answer?
What causes Melissa to run so fast?
200
Give an example of a social hazard
ex: having bad friends, smoking cigarettes, harassment
200
A large ocean wave often created by an ocean floor earthquake is a ______________
What is a tsunami?
200
Chemicals that cause cancer are called ___________
What are carcinogens?
200
During gym class Sally noticed that her friend Melissa always ran faster than her. Sally knew that they exercised equally, so she wondered what could cause Melissa to run so fast. Sally began to compare herself and Melissa to see what could cause the difference in speeds. She noticed that Melissa was taller and wondered if height affected speed. What is Sally's hypothesis? Use If..Then..
If a person's height is increased, then she will run faster.
300
What are the similarities and differences of a tornado and a hurricane?
They both have strong winds. A tornado is on land, but a hurricane is on water.
300
True or false..biomagnification begins when organisms begin to bioaccumulate chemicals in their tissues and cells.
What is True?
300
The process through which pollutants get increasingly stronger at each step in the food chain is called ____________
What is biomagnification?
300
During gym class Sally noticed that her friend Melissa always ran faster than her. Sally knew that they exercised equally, so she wondered what could cause Melissa to run so fast. Sally began to compare herself and Melissa to see what could cause the difference in speeds. She noticed that Melissa was taller and wondered if height affected speed. If Sally does an experiment, what should the dependent variable be?
What is speed?
400
Name a reason why people are concerned about POPs?
What is they are toxic, they bioaccumulate and biomagnify, and they don't disappear for many years.
400
Concentrations of DDT are higher in the large fish than in the small fish that live in the same ecosystem. This is best described as _____.
What is biomagnification?
400
Concentrations of methyl mercury build up in the tissues of fish over time. This is best described as _____.
What is bioaccumulation?
400
During gym class Sally noticed that her friend Melissa always ran faster than her. Sally knew that they exercised equally, so she wondered what could cause Melissa to run so fast. Sally began to compare herself and Melissa to see what could cause the difference in speeds. She noticed that Melissa was taller and wondered if height affected speed. If Sally does an experiment, what should the independent variable be?
What is height?
500
A scientist who studies how diseases are caused and how they spread is called a _____________
What is an epidemiologist
500
What is the relationship between human population growth and the spread of diseases?
As human population growth increases, communities also increase in density. Thus, diseases are more likely to spread because people are in closer proximity to one another.
500
Why does the Arctic and Antarctic have a high concentration of POPs in the environment if there are few producers of these pollutants in the Arctic or Antarctic?
POPs can travel by wind or water.
500
Sally predicted that taller people were able to run faster, but wanted to check her prediction. Sally measured all of her classmates’ height in centimeters and recorded it in her chart. Each classmate then ran one mile while Sally timed them with a stopwatch and recorded the data in seconds. How could Sally's experiment be improved?
ex: test only girls or only boys, do multiple trials, test people who are the same age, test people who have the same amount of running experience