7th & 8th NOS

Why should an experiment be repeated?

• to form a hypothesis
• to reduce the chance of error
• to change controls
• to identify the problem

What is the first step in a commonly used scientific method?

• digging for artifacts
• drawing conclusions
• controling variables
• recognizing a problem

A scientific conclusion is based on 

• variables and experiments
• observations and questions
• facts and observations
• tools and evidence

A scientific theory is proven true through experiments and observations. 

• True
• False

The use of science to create something that can be used by society.

• Technology
• Model
• Bias
• Experiment

A statement about what happens in nature and seems to be true all of the time.

• Scientific theory
• Scientific law

A hypothesis or concept that has been well-tested many times and has a lot of evidence to back it up.

• Scientific theory
• Scientific law

It is okay for scientists to view their results with bias.

• True
• False

You can test more than one hypothesis at a time

• True
• False

The variable that you measure

• Independent
• Dependent