Setting up tests and experiments

Min Enn wanted to find out if the amount of water will affect the rate of evaporation. What variable must she change?

Tejas wanted to find out if the height of a ramp will affect the distance travelled by a toy car. What variable must Tejas measure to conclude the results of his experiment?

Tags

NGSS.MS-PS3-1

Fadiyah wanted to find out if the amount of carbon dioxide affects the rate of evaporation in water plants. What should she do to setup her experiment?

• Add baking soda in setup A but not setup B.

• Add more water in setup A.

• Change the amount of light in setups A and B.

• Use two different plants for her setups.

Tags

NGSS.MS-ETS1-1

NGSS.MS-LS2-1

Nurul wanted to find out if the mass of objects affects the time taken for it to reach the ground. What variable(s) should Nurul keep the same for her experiment?

• time taken for objects to reach the ground

• mass of the objects

• shape of the objects

• height which the objects were dropped

Florence set up an experiment to find out if the amount of light affects the rate of photosynthesis. She left two similar plants in a dark room. The plants are placed at different distances from a same light source How does placing the plants in a dark room ensures that the test is fair?

• It ensures that the light comes from the same light source.

• It ensures that the plants are the same.

• It ensures that the rate of photosynthesis are the same.

• It ensures that the plants can take in the same amount of air.

Tags

NGSS.MS-LS1-6

A fair test can be created using what step(s)?

• Change only one variable

• Measure the variable for the results

• Keep the other variables the same

• Repeat the experiment

Alem wants to know what is the favorite food of his pet mouse. Which experimental set up will he perform?

• A

• B

• C

• D

A class was going to build a device that launched blocks by using a spring. They wanted to find out which spring of the three available would launch a block the furthest. They had three different shaped blocks they were testing, each with the same footprint. They kept the distance the spring was compressed the same. The blocks were launched on the same surface.

Is the experiment fair?

• This experiment is a fair test because all variables were carefully measured.

• This experiment is a fair test because the spring was pulled back the same amount each time

• This experiment is not a fair test because the springs used were of different thickness.

• This experiment is not a fair test because different shaped blocks were used

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A class was going to build a device that launched blocks by using a spring. They wanted to find out which spring of the three available would launch a block the furthest. They had three different shaped blocks they were testing, each with the same footprint. They kept the distance the spring was compressed the same. The blocks were launched on the same surface.

If you were one of the members of the class what would you do to make it a fair test?

• The thickness of the spring must be kept constant.

• The shape of the blocks must be kept constant.

• The distance of the spring must be different.

• The surface must be different

Tags

NGSS.MS-ETS1-1

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Ke Tian sets up an experiment to study the effects of fertilizers on plants. The table shows the data for her set-ups. Which plant is the control group?

• Plant A

• Plant B

• Plant C

• Plant D

Tags

NGSS.MS-LS1-5