Finding the Control Group
This group does not get the independent variable or treatment. It is also the one used for comparison in an experiment.
What is control group?
The one factor being tested in an experiment or the factor that you can control.
What is independent variable.
It is what you intend to measure in your hypothesis.
What is dependent/respondent variable.
Must stay the same between the groups.
What is control variables or constants.
The first step of the scientific Method.
What is identifying a problem or asking a question?
You decide you want to compare which music makes you fall asleep faster. Week 1 you listen to rock music. Week 2 you listen to country music. Week 3 you listen to classical music. Week 4 you listen to no music. What is the control?
What is week 4
Is the size of fish affected by the depth of the ocean they live? What would be the IV?
What is depth of ocean.
A group of scientists test to see if dogs fed wet food daily would lose more weight then dogs that only eat dry food. What is the IV?
What is dogs eating wet food.
You are testing if different amount of light affect plant growth. What needs to be the same between all the plants for experiment to be valid?
What is soil, fertilizer, type of plants, amount of water, time of test
The if...then statement that is testable.
What is a hypothesis.
Miss Andersen wants to know if watching a particular TV show will improve her students counting skills. She had three groups of 10 students. One group watched the TV show for 30 minutes a day for 1 week. She had another group watch a different TV show for the same amount of time, and the third group did not watch any counting show. Which is the control group?
CG= The group that watched nothing.
Is photosynthesis production of starch faster when plants are exposed to different amounts of light? What would be the DV?
What is amount of starch produced.
Children who entered kindergarten at age 5 were compared with children who entered kindergarten at age 6 on measures of academic achievement taken at grade 5. Results indicate that children who entered kindergarten at age 6 scored higher on standardized tests than those kids that entered at age 5. What is the DV?
What is score on standardized test.
The values do not change during or between experiments:
What are Constants.
The part of the scientific method to where you conduct the test.
What is the experiment.
Pea plant clones are giving different amounts of water for a three-week period. The first pea plant receives 400 milliliters a day. The second pea plant receives 200 milliliters a day. The third pea plant receives 100 milliliters a day. The fourth pea plant does not receive any extra water: the plant only receives natural ways of receiving water. The heights of the pea plants are recorded daily. Which plant is the control?
The pea plant with no water.
Spending time with a pet animal decreases the amount of stress right before taking a test. What is the respondent variable?
What is the amount of stress.
Different rose bushes are grown in a greenhouse for two months. The number of flowers on each bush is counted at the end of the experiment. What is the DV?
What is the number of roses on each bush.
One tank of gold fish is fed the normal amount of food once a day. A second tank is fed twice a day. A third tank is fed four times a day during a six week study. The fish’s weight is recorded daily. What are the constants?
What is 3 tanks of goldfish, 6 week study, weight recorded daily.
After you have recorded and analyzed the data, you must write up your findings in one of these.
What is a conclusion.
The design of a good experiment needs what variables clearly defined?
What is has one control group, independent variable, dependent variable, and controls.
You water three sunflower plants with salt water. Each plant receives a different concentration of the salt solution. A fourth plant receives just water. After two weeks, the height of the plants is measured. What is the IV? DV? and Control Group?
IV= The amount of salt in the solutions DV= The height of the plants CG= The plant that receives no salt in the water.
Three redwood trees are kept at different humidity levels inside a greenhouse for 12 weeks. One tree is left outside in normal conditions. The heights of the trees are measured once a week. IV? DV? Control Group?
What is IV-different humidity levels DV-Height of redwood tree CG-Tree kept outside
What is my name spelled correctly?
Mrs. Carroll
In this step, you create a graph or a chart of the data you collected.
What is the analyze data step.