Vocab
An educated guess made prior to conducting an experiment.
What is a hypothesis?
A step-by-step procedure used by scientists to solve a problem or discover why things happen.
What is the scientific method?
The magnification of the eyepiece.
What is 10X?
The first step of the scientific method.
What is Question/Problem?
Control variables in this experiment:
Two plants are grown using the same light and pots. One plant is given water that has been microwaved and the other plant is given regular tap water. Their height is measured after 2 weeks.
What are light and pots?
Independent variable in this experiment:
The height of bean plants depends on the amount of water they receive.
What is the amount of water?
Rule # 1
What is be respectful?
Variables that are kept the same throughout an experiment.
What are control variables?
What are materials?
The method used to find the total magnification of the microscope on each objective lens.
What is the magnification of the eyepiece multiplied by the magnification of the objective lens?
The last step of the scientific method.
What is Sharing Results?
A control variable in this experiment:
Students of different ages were given the same puzzle to assemble. The time it took them to assemble the puzzle was measured.
What is the puzzle?
Independent variable in this experiment:
A stapler is used to staple 100 papers, it jams 5 times during the trial. A different brand of stapler performs the same test; it jams 22 times.
What is the brand of stapler?
Mrs. Roeder's second job.
What is ThedaCare?
Measurements and observations made during an experiment.
What is data?
What is procedure?
The steps to properly carry a microscope.
What is one hand on the arm and the other under the base?
After gathering research, this is stated prior to beginning an experiment.
What is a Hypothesis?
Dependent variable in this experiment:
Two different cars are traveling at 60 mph. At a certain point, both cars slam on the brakes. The distance it takes for each car to stop is then measured.
What is the distance for each car to stop?
Dependent variable in this experiment:
Mosquito repellent is sprayed on one arm and the other arm is not sprayed. The number of mosquito bites is counted after 2 hours.
What is the number of mosquito bites?
The force of the fall without a mattress in the Mythbusters episode we watched.
What is 50g?
The part of the experiment that is changed or manipulated by the experimenter.
What is the independent variable?
The part of the experiment that is measured.
What is the dependent variable?
The direction the letter "e" appeared on low power.
What is upside down?
This is done with the data after an experiment.
What is Analyzing Results?
Independent variable in this experiment:
One grape is placed in tap water and another grape is placed in salt water. The change in their mass is measured after a day.
What is the presence of salt water?
Experimental group in this experiment:
An apple is cut into slices. Half of the slices are sprayed with lemon juice. All slices are stored in a sealed plastic bag. After 4 days, they are observed to see how brown they turned.
What are the slices sprayed with lemon juice?
Mrs. Roeder's favorite soda.
What is Diet Dr. Pepper?
The group in an experiment that is NOT exposed to the independent variable.
What is the control group?
The group in an experiment that IS exposed to the independent variable.
What is the experimental group?
The steps to focus a specimen under high power.
What is: 1. focus the specimen on low power w/ coarse adjustment, 2. focus the specimen on middle power w/ fine adjustment, 3. focus the specimen on high power w/ fine adjustment?
The two parts of the "Experiment" section of the scientific method.
What are Materials and Procedure?
Control group in this experiment:
Bacteria are grown in a petri dish. One side of the dish is sprayed with an antibiotic. After a week, the number of bacteria colonies are counted on each side.
What are the bacteria without the antibiotic?
Independent AND dependent variables in this experiment:
The blood pressure of a soldier is measured while he is resting. The soldier is then exposed to a stressful environment and his blood pressure is measured again.
What are: 1. Independent-environment, 2. Dependent-blood pressure?
The two types of observations mentioned on the Mythbusters worksheet
What are qualitative and quantitative?