Name:

Experiment Design Analysis - short set B

Directions:

For each scenario answer these questions on a separate sheet of paper:

  1. What is the question ?
  2. What is a possible hypothesis?
  3. Manipulated variable =
  4. Responding variable =
  5. Controlled variables =
  6. Does this experiment have a control? If so, what is the control?
  7. Is this quantitative or qualitative data ?

Chicken Feed

Omar is doing an experiment with animal feed and vitamins. He feeds 20 chickens their regular chicken chow. Omar feeds 20 other chickens the chicken chow but with added vitamins. The chickens live in identical chicken houses. After a month Omar weighs the chickens to see which ones have gained the most weight.

Good Manure

Farmer Fred wants to see what is the best manure to spread on his fields. He has three types of manure; cow, hog and chicken. He divides his field into three areas. The areas are of equal size. He spreads the same amount of manure on each area and grows oats on all three areas. In the fall for each area, Farmer Fred measures how many bushels of oats he harvested and which oats made the best tasting oatmeal.

Good Manure Part II

The next year Farmer Fred, decides to divide his field into four areas. The areas are of equal size. He spreads the same amount of manure on each area, but on one area he doesn't put any manure. In the fall, Farmer Fred measures how many bushels of oats he harvested, but he doesn't taste test the oatmeal.

Skunk Cabbage Design Analysis

Mr. Rick just read about an eastern U.S. species of skunk cabbage that warms its flower to almost 72 F° even when air temperatures are below freezing! Mr. Rick would like to do an investigation to see if our local species of skunk cabbage also heats its flowers. One early spring morning, he selects an area where several skunk cabbage plants are just appearing and takes with him a thermometer to make measurements.

For the skunk cabbage problem, skip answering number 6 above (the control question), instead answer if this is an observational or manipulative experiment and why?

Extra Credit:

Design an experiment to test for heating of skunk cabbage. Using the lab report format create a lab report for this experiment.