Admin Table of Contents
- 1 What is the independent variable in how much water flows through a faucet with different openings?
- 2 Does heating a cup of water allow it to dissolve more sugar?
- 3 Is water a dependent variable?
- 4 Does an electric motor turn faster if you increase the voltage?
- 5 Is sunlight a controlled variable?
- 6 What effect does Smiling have on teacher giving no homework?
What is the independent variable in how much water flows through a faucet with different openings?
For example: “If I open the faucet [faucet opening size being the independent variable], then it will increase the flow of water [flow of water being the dependent variable].” Scientists perform experiments to establish and observe a cause and effect relationship or change.
Does heating a cup of water allow it to dissolve more sugar?
Sugar dissolves faster in hot water than it does in cold water because hot water has more energy than cold water. When water is heated, the molecules gain energy and, thus, move faster. As they move faster, they come into contact with the sugar more often, causing it to dissolve faster.
What is the independent variable in the research problem does an electric motor turn faster if you increase the voltage?
| Question | Independent Variable (What I change) | Dependent Variables (What I observe) |
|---|---|---|
| Does an electric motor turn faster if you increase the voltage? | Voltage of the electricity measured in volts | Speed of rotation measured in revolutions per minute (RPMs) |
Does fertilizer make a plant grow bigger controlled variable?
If plants are given nitrogen fertilizer, then they will grow taller. Factors in an experiment that a scientist WANTS TO MEASURE and is changed by the independent variable.
Is water a dependent variable?
The dependent variable is usually what scientists measure in an experiment. In this case, the amount of water is the independent variable because that is what you’re changing in the experiment: one seed gets a lot of water and the other seed only gets a little water.
Does an electric motor turn faster if you increase the voltage?
It’s about the kind of force and energy an electric motor produces. The speed of a motor depends on how much power is going to it. The higher voltage of electricity you have, the faster the motor will turn.
How many variables should an experiment test at a time?
one variable
An experiment should only test one variable at a time, which is called the independent variable.
Does electric motor turn faster if you increase the voltage voltage of the electricity used is measured in volts speed of rotation measured in revolutions per minute?
bike and tires (except for the fenders!) What Makes for Good Variables?
Is sunlight a controlled variable?
Each plant is exposed to an equal amount of sunlight, so sunlight is the control variable.
What effect does Smiling have on teacher giving no homework?
5. What effect does smiling have on teacher giving no homework? If we smole more then the teacher will give less homework.