Unit 1 Science Flashcards
(13 cards)
Define Variable
Factors in an experiment that change
Independent Variable
Do you think that we purposely change in an experiment. There should only be one of these and a proper experiment. Everything else should remain the same for good results.
Dependent Variable
The thing that is affected by the independent variable. Usually this is the result of the experiment, the thing we measure as we collect the observations.
Electricity
Something used to power some devices. These devices need a battery or cord (plugging into an electrical socket) to work.
Evidence
Facts, observations, or data; can also use reasoning in place of evidence.
System
A collection of objects that interact and right/or influence one another. These objects Often work together to answer a question or solve a problem. Systems are often represented by models, which use boundaries, inputs, and outputs to describe what is and is not part of the system (e.g., the electric generator can be considered a system).
Inputs
Anything that goes into the system from outside it’s boundary (e.g., energy supplied by ones hand to turn the nail and the magnets in the electric generator).
Outputs
Anything that crosses the boundary to leave the system (e.g., light energy produced by the bulb and powered by the electric generator).
Energy
Something needed to cause change-the capacity or power to do work
Models
Simplified representations of systems, objects, ideas, processes, and right/or phenomenon that helps scientist described, explain, and make predictions. All models have a limitation and built in accuracies a scientist need to be aware of of.
What are key components to a generator?
Magnets, coils wire, and motion
As magnets pull apart from each other the…
Attraction gets weaker
How do magnets attract?
They have a magnetic field on the northside in Southside that attract
