Experimental skills

A student wants to test the effects of type of exercise on heart rate.  What is the dependent variable?

• heart rate
• type of exercise
• amount of exercise
• time of day exercise occurs

What is the INDEPENDENT variable? You are testing which type of paper airplane goes furthest?

• the type of paper airplane

• the distance of each plane's flight

• how hard the plane is thrown

Tags

NGSS.MS-PS2-2

How does the amount of fertilizer affect how many potatoes a plant produces?

• how many potatoes

• control

• amount of fertilizer

• dependent variable

• type of soil

• independent variable

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Students experiment on wilting.  They take 2 plants of the same size.  They put one in full sunlight and leave one in the classroom.  After 2 hours, the plant in the sun has drooped.
Students conclude that sunlight causes wilting.  How could this experiment be improved?

• Do more trials.  Only 1 plant in each spot isn't much repetition.
• They should put both plants in the same location.
• They should leave the plants in the location for less time so the plant isn't hurt by the sun.
• They should make sure to water both plants first.

Tags

NGSS.MS-LS1-5

How should label lines on a scientific drawing be drawn?  

• With a ruler. 

• In pencil or pen. 

• With an arrow head just touching the feature. 

• With a straight line to the middle of the feature.

Parts of the cell that are observed to be darker, should be shaded or coloured in to show a true representation of the image.

• True

• False

Choose the incorrect statement

• sketching lines is not acceptable

• stippling with dots should be used to colour in areas

• shading is acceptable

• drawing should be made using continuous lines

x-axis

• control variables

• independent variable

• dependent variable

• discrete data

current

• independent variable

• x-axis

• discrete data

• dependent variable

potential difference

• independent variable

• categoric data

• discrete data

• dependent variable