PLTW 1.2 ASSESSMENT FLASHCARDS

Front

A scientist designs an experiment to test the amount of fertilizer needed for optimum growth of bean plants. The scientist plans to vary the amount of fertilizer sprinkled into each pot, and then measure the height of each plant after one week of growth and two weeks of growth. What is the dependent variable in this experiment?

Back

Height of the plant

Front

Why is it important for scientists to write clear, step-by-step procedures when designing an experiment?

Back

Writing clear, step-by-step procedures ensures that the experiment can be replicated in the exact same way.

Front

What is the dependent variable in the speed-reading experiment described?

Back

The reading test score

Front

Mrs. J. knew that students who attended her morning study sessions performed better on science tests but very few students attended them. She wanted to test if bringing doughnuts to the study sessions would increase student attendance. She continued to advertise the sessions in the same method and hold sessions at the same time. The only difference was that she brought doughnuts to the session. She had a 50% increase in attendance when she brought the doughnuts.

What is the dependent variable?

Back

The number of students who attend the study session

Front

what I measure

Back

Dependent variable is (a)  

Front

Students wanted to see if the type of material affected the temperature after being placed under a heat lamp for 10 minutes.

What is the dependent variable for this investigation?

Back

Temperature after 10 minutes

Front

hours of sleep

Back

A study was done to determine to figure out if HOW LONG YOU SLEEP affects your TEST SCORE. The INDEPENDENT variable is...

Front

moth behavior/their reaction

Back

A scientist is testing the impact of light and dark on the moth behavior by turning a light on and off. The DEPENDENT variable is...

Front

the amount of water

Back

Maya designed an experiment to answer the following question:

How does the amount of water given to a lima

bean seed affect how tall it grows?

In this experiment, what variable should Maya CHANGE?

Front

hours of sleep

Back

A study was done to determine to figure out if HOW LONG YOU SLEEP affects your TEST SCORE. The INDEPENDENT variable is...