Nature of Science

What is the 3rd step of the Scientific Method?

• Draw conclusions
• Analyze data
• Conduct experiments
• Formulate a hypothesis

What is the formula for density?

What's the word for scientific expression?

What is a qualitative observation?

What are the three states of matter?

• solid, liquid, gas
• gas, liquid, crystal
• solid, liquid, plasma
• plasma, vapor, foam

Which step in the Scientific Method helps develop a question?

• Observation
• Experimentation
• Hypothesis
• Conclusion

A​ (a)   change in matter are often reversible; an ice cube can melt into ​ (b)   water, and then the liquid water can be ​ (c)   into a ​ (d)   . ​ A (e)   change are not reversible. A log burned in a fire turns to ash and so breaks chemical bonds.

• physical
• liquid
• frozen
• solid
• chemical
• gaseous
• plasma
• sublimated

How many elements in the periodic table are man-made?

• 188

• 94

• 24
• 12

What is a controlled variable?

• A controlled variable is an outcome that changes during the experiment.
• A controlled variable is a random factor in an experiment.
• A controlled variable is the main variable being tested.
• A controlled variable is a constant factor in an experiment.

What is an independent variable?

• The outcome measured in response to changes in the independent variable.
• A variable that is changed or controlled in a scientific experiment.

• A variable that remains constant throughout the experiment.
• A variable that is only observed and not manipulated.