It's what you change to do your experiment. Say your doing an experiment like my friend Kristen Maxine Rogers is doing: Does air temperature affect how long soap bubbles last, her independent variable would be the different temperatures.
Sure. Take a sealed balloon full of air. Keep changing its pressure and temperature, and keep track of what happens to its volume.
Sure. Take a sealed balloon full of air. Keep changing its pressure and temperature, and keep track of what happens to its volume.
The manipulated variable in an experiment with a water rocket could be the amount of water or air pressure used to launch the rocket. This variable is intentionally changed by the experimenter to observe its effect on the rocket's performance.
The independent variable in an experiment could be factors such as light, temperature, or water levels. By manipulating the independent variable, such as changing the amount of light or water given to the radish seeds, you can observe how it affects their germination rate. Each independent variable can have a different effect on radish germination.
The variable that the experimenter deliberately changes is called the independent variable. The thing you are observing as a result of the different 'values' or 'conditions' of the independent variable is called the dependent variable. If the experiment is well controlled, then you can have some confidence that changes in the dependent variable have come about directly as a result of your changes to the independent variable.
The independent variable in this experiment is the type of environment in which the ice cube is placed (air or water). This variable is manipulated by the experimenter to observe its effect on the rate of melting of the ice cube.
The velocity of sound in air is independent of changes in frequency. Sound waves travel at a constant speed determined by the properties of the medium they are traveling through, such as air temperature and pressure.
It's what you change to do your experiment. Say your doing an experiment like my friend Kristen Maxine Rogers is doing: Does air temperature affect how long soap bubbles last, her independent variable would be the different temperatures.
The mass of the balloon is independent. Atmospheric pressure will not change this because atoms are not being added or taken away from the balloon itself or its contents. The volume of the balloon will change, however, as it will expand or compress in response to the atmospheric pressure around it. The volume, therefore, is a dependent variable in this situation.
dependent - the rate at which the grass grows independent - the temperature of the air
One experiment that proves that air exerts pressure is the collapsing can experiment. In this experiment, a small amount of water is boiled in a can, and the can is then sealed. As the steam cools and condenses, it creates a vacuum inside the can, causing the outside air pressure to crush the can. This demonstration shows that air exerts pressure.