Terms
the "normal" or "plain" group in an experiment used as a basis of comparison
The control group
We test plant growth (height) in plants by having three different plants and changing the amount of water given to the three. Water is the...
Independent variable
The test variable/factor is otherwise known as the...
The independent variable
I wanted to see how plants grow in different amounts of light, so I had the same plant under all the same conditions aside from changing the amount of time said plants are under light. (No light, light during day and none at night, light all day and all night) Then, I measured the height in cm of the plants each week for 8 weeks. What is my control group?
No light.
anything that can influence the outcome of an experiment
factor
We test the correlation between good grades in science vs. the amount of sleep students get at night (hours). The dependent variable is...
The dependent variable
I wanted to see how plants grow in different amounts of light, so I had the same plant under all the same conditions aside from changing the amount of time said plants are under light. (No light, light during day and none at night, light all day and all night) Then, I measured the height in cm of the plants each week for 8 weeks. The independent variable is..?
The amount of light the plant gets
a convenient (easy to read) way to show the results of an experiment
a Graph/Table
We test the correlation between the speed of race horses vs. the food they eat (3 horses, 3 types of hay/grasses/protein rich feed) The independent variable is...
The type of food
One of the early steps in experimentation, where scientists make a prediction about how a variable will effect an experiment's results.
Hypothesis
I wanted to see how plants grow in different amounts of light, so I had the same plant under all the same conditions aside from changing the amount of time said plants are under light. (No light, light during day and none at night, light all day and all night) Then, I measured the height in cm of the plants each week for 8 weeks. The results of the experiment would be?
The height data showing how much the plants grew under their conditions
something that can be seen, heard, noticed, or measured using the senses
observation
We test the correlation of happiness in frogs vs. the amount of pets their handlers give them. The dependent variable is...
Happiness (although we are still not sure how we'll measure happiness in frogs in a concrete way)
Usually the second to last step in experimentation, in which we describe the data and explain and analysis of said data in a lab report
Results/Analysis
I wanted to see how plants grow in different amounts of light, so I had the same plant under all the same conditions aside from changing the amount of time said plants are under light. (No light, light during day and none at night, light all day and all night) Then, I measured the height in cm of the plants each week for 8 weeks. What is the dependent variable
The height
a step-by-step planned procedure to test a hypothesis
An experiment
We test the correlation between Carbon emitted (tons of CO2) into the atmosphere from a combustion engine based on the velocity with which we drive a vehicle. The dependent variable is...
CO2 emitted
The final step in experimentation or the Scientific method, where scientists give a final explanation of what their data means and the overarching themes of the study
Conclusion
I wanted to see how plants grow in different amounts of light, so I had the same plant under all the same conditions aside from changing the amount of time said plants are under light. (No light, light during day and none at night, light all day and all night) Then, I measured the height in cm of the plants each week for 8 weeks. I found that the plant with no light grew 1.2cm, the plant with daily sunlight grew 6.8cm, the plant that had light 24 hours/day grew 11.3cm. What would be a reasonable conclusion for this experiment?
That there seems to be a positive correlation between the amount of light received and the number of cm grown.
I wanted to see how plants grow with different amounts of nutrients (nitrogen), so I had the same plant under all the same conditions aside from changing the amount of nutrients said plants are receiving. (No nitrogen, 1g/day, 3g/day) Then, I measured the height in cm of the plants each week for 8 weeks. The heights of said plants were 5cm, 5.2 cm, and 4.8cm, respectively. What are appropriate results for this experiment?
That there is no correlation between nitrogen received by the plant and height.