Scientific Method

Which of the following is an appropriate aim for an investigation

• I aim to investigate whether the sky is blue

• To see what happens when I add mentos to coke

• To investigate the relationship between caffeine intake and reaction time

• To investigate how long it takes for a cart to roll down a ramp

Tags

NGSS.MS-PS2-2

If I floss more, then I will have fewer cavities. What is the independent variable?

• Number of cavities

• Amount of flossing

• Type of floss used

• Amount of brushing

If I put on a higher factor sunscreen, then I will burn less. What is the dependent variable?

• Severity of sunburn

• Factor of sunscreen

• Time spent in the sun

• Weather conditions

Does pipe material affect the temperature of flowing water? What is a controlled variable?

• Temperature of water

• Thickness of pipe

• Pipe material

• Diameter of pipe

Tags

NGSS.MS-PS3-4

NGSS.MS-PS1-4

The dependent variable is

• The variable that you change in an investigation

• The variable that you measure in an investigation

• A variable that you keep the same in an investigation

The independent variable is

• The variable that you change in an investigation

• The variable that you measure in an investigation

• A variable that you keep the same in an investigation

What is the purpose of controlled variables

• To control what happens in the investigation

• To make the investigation valid

• To make the investigation reliable

Tags

NGSS.MS-PS3-4

Repeating the investigation, removing outliers and taking an average improves the investigation's (a)  

If I put my batteries in the fridge, they will last longer. What is the control group?

• Batteries in the fridge

• Batteries on the desk

• Batteries in the oven

Which of the following is an appropriate risk to include a risk assessment

• Getting acid on your skin

• Breaking the test tube which is sharp

• Dropping the weight on your foot

• Electrocution from exposed wires