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WorksheetsUnit 1: Scientific Practices
Total questions: 35
Worksheet time: 46mins
The variable changed/manipulated by the scientist, such as time, date, depth, and/or temperature. This is usually placed on the x-axis.
dependent variable
independent variable
controlled variable
What you learned from the experiment includes summary of the data/results is the ___.
If you are testing the buoyancy (ability to float) of a cotton ball and you leave one plain, cover one half in oil, and cover the third in oil completely then place each in water, what is the variable?
What is a dependent value?
what you measure in the experiment and what is affected during the experiment
The variable that is changed in order to test the hypothesis
The factors that stay the same in all parts of the experiment.
Juan wanted to know if different brands of tires would make his model car go faster. Juan correctly set up an experiment to test 4 different brands of tires on his model car. According to his data table, which brand appeared to result in the fastest time?
A
B
C
D
Students used various temperatures of water to see which one dissolved candy faster.
What was the independent variable?
amount of candy
amount of water
temperature of water
time for candy to dissolve
Investigation: How will music affect student results on exams? 20 students in a quiet room taking a test. 20 students in another room with music playing. What is the independent variable?
20 students in quiet room
20 students in music room
Exam results
Music playing
the variable that remains the same
What is the control?
What is the controlled variable?
What is the independent variable?
What is the dependent variable?
What is the independent variable?
What is the dependent variable?
What is the independent variable?
What is the dependent variable?
Joe tells Gabby his theory about why sea turtles nest on the beach instead of in the ocean. He says, “The turtle eggs would sink to the bottom of the ocean, and the baby turtle would drown. I know this because my uncle is a fisherman, and he told me this information. Gabby tells Joe that his theory is not scientific. Why does Joe’s idea not meet the requirements to be a scientific theory?
Joe’s idea is already a scientific law.
Joe’s idea is not supported by scientific evidence.
Joe’s idea is a good guess that can be tested by experiments.
Joe and his uncle are not scientists.
Thomas tests different types of liquids to see which will grow his plants the most. He has water, soda, milk, and no liquid at all. What is the control group?
the one with water
the one with soda
the one with milk
the one with no liquid
A statement that tells what an investigation showed based on evidence (observations and data)
Conclusion
Variable
Observation
Repeated Observation
Investigation
Accurate results in an investigation.
Conclusion
Test Variable
Valid
Simulation
Which group in an experiment is treated ?
Water fleas typically live in water that is 20oC. A student believes that increasing water temperature will increase heart rate. Water fleas are placed in 20°C, 30oC, 40oC, and 50oC water and their heart rates are recorded. The student collects data with ten water fleas at each of the water temperatures. Which of the following best describes the levels of treatment?
30, 40, and 50oC water
20oC water
# of water fleas
ten water fleas tested at each temperature
type of flea
Water fleas typically live in water that is 20oC. A student believes that increasing water temperature will increase heart rate. Water fleas are placed in 20°C, 30oC, 40oC, and 50oC water and their heart rates are recorded. Which of the following best describes the control group?
water flea heart rate
20oC water
# of water fleas
40oC water
type of flea
A student is studying the effect of sunlight on plants. The student developed this hypothesis: Plants need light to make food and to grow properly. To conduct a controlled experiment, which method should she use?
Choose two identical plants; put one in the dark and one near sunlight; use the same amount of water; water both regularly
Choose a healthy plant; put it in a dark place; use clean water; water the plant regularly.
Choose two identical plants; put each in the dark for 12 hours and then light for 12 hours; use the same amount of water; water both regularly.
Choose three identical plants; put one in the dark, one near sunlight, and one in the shade, water only the plant in light.
A student is studying the effect of sunlight on plants. Which option would ensure they had the most valid results?
Run the test only 1 time.
Run the test 5s time.
change the hypothesis.
form a conclusion
