Variables

You are testing how the amount you water a plant affects its growth. What would be the INDEPENDENT VARIABLE in this experiment.

• They type of pot you put the plants in.

• The amount you water each plant.

• The amount of sunlight the plants get.

• The amount the plant grows.

If you were testing the time it took for objects of different sizes to reach the ground after being dropped from 30 feet in the air, which of these would be the DEPENDENT VARIABLE?

• The time it takes for each object to hit the ground.

• The size of each object.

• The type of object you use.

• The height you drop the object from

Tags

NGSS.3-PS2-1

NGSS.3-PS2-2

NGSS.5-PS2-1

Why do we use graphs in science?

• to record and display data

• to show trends in data

• to predict what will happen if we extend the experiment

• all of these are correct

A scientist is testing which flavor of ice cream melts the fastest. What would his controlled variables be? (choose ALL that apply)

• The flavor of ice cream

• the bowl the ice creams are in

• the place in the room where the ice cream is

• the size of the scoop

• the time it takes to melt

Tags

NGSS.3-5-ETS1-3

A scientist is studying if height and arm length are connected. What can the scientist conclude from this graph?

• Height does not affect arm length.

• Height does affect arm length for most people.

• Height always affects arm length.

• There is no trend so I would not be able to tell.

Tags

NGSS.MS-PS3-1

Sadie is testing how the age of a seed affects how fast plants grow. Look at the picture to see if you can figure out what makes her experiment unfair. Mark all that apply.

• She used different types of seeds/plants.

• The plants are in different pots.

• She did not plant very many plants.

• Seed age might not make a difference.

Tags

NGSS.3-5-ETS1-3

Dependent variables...

• are controlled by the scientist

• are the result of the independent variable--results of your experiment

• are kept the same in the experiment.

• are always going to be 0

Ms. A was testing if the bead in the first investigation changed color when her mood changed. NOTHING happened to her bead when she was feeling different ways. Was this experiment a failure? WHY OR WHY NOT?

• Yes, it was a failure because she did not find anything out.

• No, it was not a failure because she found out that mood does not affect the bead´s color.

• No, it was not a failure because she learned that the bead was not working properly.

• Yes, it was a failure because she broke the bead.

Tags

NGSS.MS-LS1-5

Why do scientists do the same experiment multiple times?

• To see if their results are reliable, and then they can form a theory.

• Because it is fun.

• Because their boss makes them.

• Probably they do not have anything better to test.

Tags

NGSS.3-5-ETS1-3

What if two scientists are doing the same experiment, but they get different results?

• They should give up.

• They should repeat the experiment again and see what happens.

• They choose a different independent variable to test.

• They are both wrong.

Tags

NGSS.MS-ETS1-4