1. observation is made using one or more of the five senses. 2. An independent variable is a variable that’s changed in an experiment.
3. An explanation based on an observation is a/an .
4. There may be only one variable in an experiment.
5. observation is made using tools or measurement.
6. What’s the difference between an observation and inference?

what image you forgot to include it.

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false because ozone (o3) depletion does not cause global warming, but both of these environmental problems have a common cause: human activities that release pollutants into the atmosphere altering it.

global warming is caused primarily by putting too much carbon dioxide into the atmosphere when coal, oil, and natural gas are burned to generate electricity or to run our cars.

explanation: