Experimentation and The Scientific Method

A scientific theory should always be _________________________.

Based on a full set of proven facts.

Which of these are steps in the scientific method?

Hypothesis, Analysis, and Conclusion.

You research your favorite topic: earthquakes. You build a tall Lego building. You want to know which type of motion is most damaging to your building. You discover in your research that side-to-side motion is the worst. You will place the building on a piece of wood and shake it for durations of 30 seconds, 60 seconds, and 90 seconds. You will try an up-and-down motion and side-to-side motion. Give an example of a proper hypothesis.

If the motion is side to side the Lego building is most likely to break, because researchers say that is the worst motion for buildings to beak in real earthquakes.

Which one of these is not a step in the scientific method?

Independent Variable

Which of the following are measurable?

The actual number of new leaves on a plant How often a plant is watered How much sunlight a plant receives

How do scientists prove a scientific theory before it becomes widely accepted?

-Scientists collect results from many, many different experiments -Scientists test other scientists' results to see if they get the same results -Scientists design multiple experiments -Scientists do experiments over and over again, getting facts to see if they can disprove the theory

What is a control variable?

A basis for comparison.

If you really weigh 180 pounds, and you step on a scale, and it says you weigh 180 pounds the scale is [ Select ] ["falsifiable", "imprecise", "accurate", "observable"] . If you get off the scale and weigh yourself several more times, getting 182 pounds, 178 pounds, and 185 pounds, the scale is [ Select ] ["flasifiable", "obsevable", "imprecise", "accurate"] . (Write your answer in lower case.)

Accurate Imprecise

In an experiment, the ___________________ variable changes as a result of the variable that was changed by the experimenter.

dependent

The_________ variable is changed by the experimenter. The _______ variable changes as a result of the _________ variable changing.

independent dependent independent