scientific method review

Is the following question testable?

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

• yes

• no

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

• height of pea plants

• amount of sunlight

• type of soil

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

Tara wanted to find out which brand of popcorn results in the fewest unpopped kernels. She purchased 3 of the same size bag of different brands of microwave popcorn. Tara popped Brand A for 3 minutes and 30 seconds, Brand B for 3 minutes and 45 seconds, and Brand C for 4 minutes. She poured each bag into a separate bowl and counted how many unpopped kernels remained. ...............What did Tara do wrong?

• She used different brands of popcorn.

• She popped the bags for different amounts of time.

• She should have used the same brands of popcorn and popped them for the same amount of time.

Step 1 in the Scientific Method

• problem

• experiment

• observe

• results

The steps a scientist carries out to see if their hypothesis is correct is called

• a recipe

• directions

• the scientific method

• a list

The steps to of the Scientific Method are correct below.

Observe

Problem

Hypothesis

Experiment

Results

Conclusion

• TRUE

• FALSE

This step of the scientific method involves the 5 senses.

• results

• data

• observe

• problem

A possible explanation to a problem that has not yet been tested. An if, then, statement.

• data

• theory

• hypothesis

• fact

This variable in an experiment is the one being deliberately changed by the scientist. 

• dependent variable
• independent variable
• data
• control group