IV DV varibles

A stapler is used to staple 100 papers, it jams 5 times during the trail. A different brand of stapler performs the same test: it jams 22 times. what is the independent variable?

• Number of papers stapled.

• number of times the Stapler jams.

• Type of stapler

• type of paper.

Cockroaches are exposed to a pesticide. After 3 hours, 95% of the insects are dead. What is the dependent variable.

• Type of Pesticide.

• type of cockroaches

• how long the cockroaches are exposed to the pesticides.

• Number of insects are dead.

Two plants are grown using the same light and pots. One plant is given microwaved water and the other plant is given regular tap water. Their height is measured after 2 weeks. what is the dependent variable.

• the height of the plant

• The amount of light

• Type of water

• the pots

Tags

NGSS.MS-LS1-5

The blood pressure of a soldier is measured while he is resting. the soldier is then exposed to a stressful environment and his blood pressure is measured again. what is the independent variable?

• Blood pressure

• environment

• the soldier

• type of doctor.

Tags

NGSS.MS-LS1-3

An apple is cut into slices. Half of the slices are sprayed with lemon juice. All slices are stored in a sealed plastic bag. after 4 days, they are observed to see how brown they turn. dependent variable.

• Lemon juices

• the number of slices

• how brown they turned

• the number of days

Tags

NGSS.MS-PS1-2

What is the dependent variable?

• Type of fertilizer

• Average plant height

• The effect of fertilizer on plant height

• The effect of plant height on fertilizer

Tags

NGSS.MS-LS2-1