An investigation in which all of the conditions are controlled. Scientists study what happens to a group of samples that are all the same except for one difference.
What are the three types of scientific methods/investigations?
Experiments, reapeated observations, and using models
Scientists use this to study processes in nature that they can observe but can't control
Scientists use this when they can not experiment on the real thing. They help scientists investigate things that are large (like planets), expensive (like a bridge), or uncontrollable (like the weather).
Which method would a scientist use to determine how different bridge designs react to strong winds?
Which method would a scientist use to determine how fast the wind blows where a bridge will be built?
Which method would a scientist use to determine which type of paint works best to keep a bridge from rusting?
How does a hurricane affect animals? Are coral reefs dying? How do whales raise their young? These are examples of scientific questions that can be answered through which method?
How does a bat fly? Why might Saturn's rings look close up? How does a heart work? These are examples of scientific questions that can be answered through which method?