Scientific Method

A scientist plants two rows of corn for experimentation. She puts fertilizer on row 1 but does not put fertilizer on row 2. Both rows receive the same amount of water and light intensity. She checks the growth of the corn over the course of 5 months. What is a constant in this experiment?

• plant height

• corn without fertilizer

• corn with fertilizer

• amount of water

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

An experiment for a new asthma medication was set up into two groups. Group one was given the new medicine for asthma, while group 2 was given the original asthma medicine. What group is considered the control group? 

• The group taking the original medicine

• The group taking the new medicine

• amount of water they drink while taking the medicine

• asthma

A student decides to set up an experiment to see if detergent affects the growth of seeds. He sets up 10 seed pots. Five of the seed pots will receive a small amount of detergent in the soil and will be placed in the sun. The other 5 seed pots will not receive detergent and will be placed in the shade. All 10 seed pots will receive the same amount of water, the same number of seeds, and the same type of seeds. He grows the seeds for two months and charts the growth every 2 days. Identify an error in this experiment. 

• There are no errors. This experiment is being done correctly.

• The student should have a larger number of pots.

• Each plant should also receive different amounts of water.

• More than one variable is being changed.

Tags

NGSS.MS-LS1-5

In a controlled experiment, the variable that is changed to test the hypothesis is called the:

• control

• independent variable

• dependent variable

• constant

Tags

NGSS.MS-PS3-4

What is the dependent variable in a experiment?

• It is the variable that you change in an experiment.

• It is the variable that is being measured in an experiment.

• It is a list of steps including materials.

• It is your testable prediction about the outcome of the experiment.

Tags

NGSS.MS-PS3-4

In an experiment to find out how the height from which a student drops a ball affects how high the ball bounces, the independent variable is the ___

• Height the ball bounces

• Force acting on the ball

• Diameter of the ball

• Height from which ball is dropped

A student wants to conduct an experiment to find out how heart rate changes as the length of time spent exercising increases.
What is the dependent variable?

• time spent exercising

• heart rate

• the floor used for the exercise

• the type of exercise

Which of the following is a strong hypothesis?

• If the plants are exposed to excessive sunlight, then they will wilt because too much sunlight negatively impacts photosynthesis.

• If the cows eat grass, they will get sick.

• How does the number of paint cans affect how bright the walls will look?

• Plants need water to survive.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS1-6

How many steps are in the scientific method?

• 1

• 4

• 6

• 8

Tags

NGSS.MS-LS1-5

Is the following hypothesis supported by the data displayed in the picture? If plants are exposed to blue light, then they will grow to a taller height than the ones exposed to any other color because blue light is best for plants.

• No, it appears that white light is best.

• Yes, it appears that blue light is best.

• No, it appears that red light is best.

Tags

NGSS.MS-LS1-5