Scientific Method Review

In this experiment, what is the independent variable? "Does a nail rust faster in water or vinegar?"

• Time to rust

• Type of nail

• Type of liquid

• Temperature of liquid

What is the dependent variable in this experiment? "What temperature allows hot air balloons to rise the fastest?"

• Time for balloon to rise

• Size of balloon

• Person operating the balloon

• Temperature

Tags

NGSS.MS-PS3-4

What are two controlled variable in the following experiment? "Which brand of band-aid stays on the longest?"

• Brand of band-aid

• Time band-aid stays on

• Air humidity

• Amount of activity the person does

Tags

NGSS.MS-PS2-2

The total deaths mentioned in this graph are from COVID-19. What conclusion can you draw from this graph?

• Masks will eliminate deaths from COVID-19.

• Masks will keep the death rate lower than other options.

• Masks will have little effect on the death rate.

Tags

NGSS.HS-ETS1-3

What is the best description of the trend of this graph?

• As the years increase, the total population increases.

• As the years increase, the total population decreases.

• As the years increase, the population decreases till 1900, stays mostly constant until 1960, and then decreases after that.

• As the years increase, the population increases till 1850, decreases till 1900, stays mostly constant until 1960, and then decreases after that.