What effect does fertilizer have on the growth of tomato plant?
Pot experiment showed that biological organic fertilizer could significantly promote the growth of tomato, and the height of the tomato increased by 98.8% and 23.8%, respectively, compared with CK.
What is the dependent variable in Levi’s experiment on tomato plants?
The increase in height of plants was the dependent variable. The increase in height of plants was the independent variable. Use the following study to answer the following question.
Where should the independent and dependent variables of Levi’s experiment be placed when graphed?
The independent variable is placed on the x-axis, and the dependent variable is placed on the y-axis.
What error did Ivan make in the design of his investigation?
Note: Group 1 is Ivan’s control group. What error did Ivan make in the design of his investigation? Ivan tested more than one independent variable at a time.
Which best describes how scientists behave when the results of an experiment do not support a theory?
which best describes how scientists behave when the results of an experiment do not support a theory? scientists conduct further experiments. scientists have increased their ability to make observations beyond their own senses through the invention of specialized equipment such as x-ray telescopes.
What is the dependent variable in Norman’s investigation?
The room has a constant temperature and level of light for all students. Read the following scenario. What is the dependent variable in Norman’s investigation? Norman thinks that the brain function of students suffers when they receive less sleep.
What variable do you change?
An easy way to think of independent and dependent variables is, when you’re conducting an experiment, the independent variable is what you change, and the dependent variable is what changes because of that. You can also think of the independent variable as the cause and the dependent variable as the effect.
What are the 4 variables in a science experiment?
Variables are the factors, traits, and conditions you can modify and measure. You’ll find different variables in all types of subjects. But, the most common variables found in a science experiment include dependent, independent, and controlled. Check out what each is through examples.
What variable is changed in an experiment?
What should a good experiment have?
Four basic components that affect the validity of an experiment are the control, independent and dependent variables, and constants.
How many dependent variables do you want in an experiment?
two dependent variables
What is the similarities and differences between independent and dependent variables?
The independent and dependent variables are the two key variables in a science experiment. The independent variable is the one the experimenter controls. The dependent variable is the variable that changes in response to the independent variable. The two variables may be related by cause and effect.
What is a constant independent and dependent variable?
A controlled variable is one that is constant and is unchanged in an experiment. It is held constant in order to observe the result of the independent variable. An independent variable is the variable that is being changed in the experiment in each trial, while a dependent variable is the one that is being measured.
What is the dependent variable when the pH level is constant?
The factors that remain constant are called the control variables. Control variables allow you to conclude that the results on enzyme activity obtained in your experiment are due to the varying of pH, the independent variable.
What are 2 things that must remain constant for this experiment?
There must be an independent variable, which changes throughout the course of an experiment; a dependent variable, which is observed and measured; and a controlled variable, also known as the “constant” variable, which must remain consistent and unchanging throughout the experiment.
How do you remember independent and dependent variables?
Many people have trouble remembering which is the independent variable and which is the dependent variable. An easy way to remember is to insert the names of the two variables you are using in this sentence in they way that makes the most sense.
How many variables can an experiment test at a time?
What stays constant in an experiment?
A constant is a quantity that does not change. Although you can measure a constant, you either cannot alter it during an experiment or else you choose not to change it. Contrast this with an experimental variable, which is the part of an experiment that is affected by the experiment.
Are factors that the experimenter is changing?
The independent, or manipulated variable, is a factor that’s intentionally varied by the experimenter. The dependent, or responding variable, is the factor that may change as a result of changes made in the independent variable.
What are the controls in an experiment?
Controls allow the experimenter to minimize the effects of factors other than the one being tested. It’s how we know an experiment is testing the thing it claims to be testing. This goes beyond science — controls are necessary for any sort of experimental testing, no matter the subject area.
What is control condition example?
For example, in an investigation of a new drug, participants in a control condition may receive a pill containing some inert substance, whereas those in the experimental condition receive the actual drug of interest. …