Question

Identify independent variable, dependent variable, constant in the example below. Also predict a hypothesis based on your knowledge:
A gardener wants to see if increasing the amount of light that a plant receives will increase the growth of the plant?
Independent variable: _______________________
Dependent variable: ________________________
Constants: 1 ___________________________ 2 __________________________
3___________________________

Hypothesis: __________________________________________________________ ____________________________________________________________________

Answer 1

in the plant growth experiment, the independent variable is the light color. The light color is not affected by anything. You will choose different light colors like green, red, yellow, etc. You are not measuring the light.

The variable that affects the dependent variable is called the independent variable. In the plant experiment, the independent variable could be fertilizer—some plants will get fertilizer, others will not.

If the amount of sunlight is increased, then plant growth will increase. The hypothesis that plant growth increases as the amount of sunlight increases was supported by the data.

Independent and dependent variables

The independent variable is the cause. Its value is independent of other variables in your study.

The dependent variable is the effect. Its value depends on changes in the independent variable.

Control groups in scientific research. ... Researchers change the independent variable in the treatment group and keep it constant in the control group. Then they compare the results of these groups. Using a control group means that any change in the dependent variable can be attributed to the independent variable.

Independent variable – the variable that is altered during a scientific experiment. Dependent variable – the variable being tested or measured during a scientific experiment. Controlled variable – a variable that is kept the same during a scientific experiment.

The independent (or manipulated) variable is something that the experimenter purposely changes or varies over the course of the investigation. The dependent (or responding) variable is the one that is observed and likely changes in response to the independent variable.

Plant height is the dependent variable that responds to the change in the independent variable. Each plant is exposed to an equal amount of sunlight, so sunlight is the control variable. They are also grown in the same sized pot and given an equal amount of water.

An experiment usually has three kinds of variables: independent, dependent, and controlled. The independent variable is the one that is changed by the scientist.

The dependent variable depends/changes when the independent variable is changed. For example, if you open a faucet (the independent variable), the quantity of water flowing (dependent variable) changes in response--you observe that the water flow increases.

Bar graph – A bar graph shows the quantity of dependent variable verses the independent variable. This bar graph allows an observer to easily see which is the most or least common result of an investigation.

An independent variable is one that is unaffected by changes in the dependent variable. For example when examining the influence of temperature on photosynthesis, temperature is the independent variable because it does not dependent upon photosynthetic rate.

The dependent variable responds to the independent variable. It is called dependent because it "depends" on the independent variable. In a scientific experiment, you cannot have a dependent variable without an independent variable.

In a strict sense, plants do not grow faster in the dark; they grow slower. However, plants seem to grow faster in insufficient light due to rapid cell elongation. ... In conditions of total darkness, plant cells will generally expand upward, a process called geotropism.

A dependent variable relies (depends) on other variables to get its value. An independent variable doesn't rely on any others to get its value. Think of if you were looking at how temperature changed with the time of day. ... So, the temperature is dependent, and the time is independent.

The independent variable (IV) is the characteristic of a psychology experiment that is manipulated or changed by researchers, not by other variables in the experiment. For example, in an experiment looking at the effects of studying on test scores, studying would be the independent variable.

The color of light DOES affect plant growth, but the effect is more noticeable under low light intensity. Red & blue light are most effective for plant growth, while yellow & green have minimal effect. UV light can damage plants, causing leaves to burn. Growers often use supplemental light to optimize plant growth.

Plants do best with a light that has a lot of red and blue and smaller amounts of green and yellow. White light is not important for plants – having the right amount of each wavelength is important.

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Answer 2

Answer:

Hypothesis is explained below.

Explanation:

In plant growth experiments, the independent variable is light color. Light colors are inactive. Choose different bright colors like green, red and yellow. We do not measure light. In plant experiments, the independent variable is fertilizer. Some plants fertilize, some don't.

With increasing amount of sunlight plant growth increases. The hypothesis that increasing the amount of sunlight increases plant growth was confirmed by the data.

Control group in scientific research. ... the researchers change the independent variable in the treatment group and keep it constant in the control group. Then compare the results of these groups. A control group allows you to attribute changes in the dependent variable to the independent variables.

Independent variable - The variable that changes during a scientific experiment. Dependent variable - The variable that is tested or measured during a scientific experiment. Control variable - A variable that is held constant throughout a scientific experiment.

An independent (or instrumental) variable is one that the experimenter intentionally changes or modifies during the study. The dependent (or response) variable is an observed variable that changes in response to an independent variable.

Plant height is a dependent variable that responds to changes in the independent variable. Each plant receives the same amount of sunlight, so sunlight is the controlling variable. Grow them in pots of the same size and with the same amount of water.

Plants grow under light, with more red and blue colors and less green and yellow. White light is not important for plants. It is important to have the right amount of each wavelength.

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