Scientific Method Review

Is the following question testable?

Does the amount of fertilizer affect how tall a flower grows?

• yes

• no

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Is the following question testable?

Are roses prettier flowers than tulips?

• yes

• no

Is the following question testable?

Can daisies grow in different types of soil?

• yes

• no

Tags

NGSS.MS-LS1-5

Is the following question testable?

Do daffodils smell better than carnations?

• yes

• no

Is the height of a ball's bounce affected by the height from which the ball is dropped? What is the dependent variable?

• height from which the ball is dropped

• type of ball

• height of the ball's bounce

Tags

NGSS.MS-PS2-4

What amount of sunlight makes pea plants grow tallest? What is the independent variable?

• height of pea plants

• amount of sunlight

• type of soil

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Two groups of students were timed to compare how fast they could complete a set of math problems. Each group was given the same problems. One group used calculators. The other group did not use calculators.

IV: using or not using calculators

DV: amount of problems solved correctly

CV: same math problems

• The DV is wrong. Here is what it should be: the time it takes to complete the problems

• The IV is wrong. Here is what it should be: boys versus girls

• The CV is wrong. Here is what it should be: same amount of time for all students

Students of different ages were given the same puzzle to put together. The time it took each student to complete the puzzle was compared.

IV: boy or girl students

DV: time it took to complete the puzzle

CV: same puzzle

• The CV is wrong. Here is what it should be: age of students

• The DV is wrong. Here is what it should be: the size of the puzzle

• The IV is wrong. Here is what it should be: age of the students

Select the correct hypothesis for the following variables.

Research Question: Does salt water freeze faster than fresh water?

Independent Variable: type of water (salt water or fresh water)

Dependent Variable: time it takes water to freeze

• If salt water freezes faster than fresh water, then I will test salt water and fresh water.

• If I test salt water and fresh water, then salt water will freeze faster.

• If I test salt water and it freezes, then I will test fresh water.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Select the correct hypothesis for the following variables.

Research Question: Does the color of the recycling bin, red or blue, affect the number of cans recycled at school?

Independent Variable: color of recycling bin (red or blue)

Dependent Variable: number of cans recycled at school

• If I test red and blue recycling bins, then blue bins will result in more cans being recycled.

• If more cans are recycled, then I will test red and blue recycling bins.

• If I test red and blue recycling bins, then purple bins will result in more cans being recycled.

Tags

NGSS.HS-LS2-7