WorksheetsSC 6 N 1 1
Total questions: 15
Worksheet time: 15mins
Why did each group test the amount of drops of water a penny could hold before changing their variable?
It provides more data to include in a lab report
It ensures that the hypothesis will be correct
It adds an independent variable to the experiment.
It is the control and serves as the basis for comparison
How many variables should be changed in an experiment?
ONE
TWENTY
THREE
TEN
Group 1 found food coloring affects the amount of drops a penny holds. Group 2 found that food coloring does not. What should they do?
Ignore Group 2
Conduct it again with quarters
They should repeat the experiment again and compare results
Conclude that food coloring has no effect
What is empirical evidence?
Evidence that comes from scientific testing.
Evidence that you think but has never been tested.
Which method is best for determining scientifically which of two fertilizers is most effective for raising tomato plants?
Treat two different varieties of tomato plants individually with the different fertilizers and measure their growth and appearance. Compare differences in the growth of individual plants.
Apply one type of fertilizer to a group of similar tomato plants and apply a different type of fertilizer to a different group of similar tomato plants and compare the growth and appearance of both groups.
Use one type of fertilizer on a group of different varieties of tomato plants and measure their growth and appearance. Compare their growth to a group of plants that were not treated with the fertilizer.
Mix the two types of fertilizers and apply the mixture to one variety of tomato plants and measure their growth and appearance. Compare their growth and appearance to a group of tomato plants that were not treated with the mixture.
A group of students investigate the effect of carbon dioxide on plant height. The students grow plants in several closed containers. All the plants receive the same amounts of water and light, but the air in each container has a different amount of carbon dioxide. What is the test variable (independent variable) in this experiment?
height of each plant after a period of time
amount of carbon dioxide in each container
amount of air in each container
amount of water provided to the plants
Eddie wants to determine if different colored boxes produce the same temperature inside as a white box. He places white, black, and red boxes of the same size in the sunlight. A thermometer is placed inside each box. He observes and records the temperatures in the boxes throughout the day. What is the test variable (independent variable) in this investigation?
size of the boxes
repeated trials
color of the boxes
recorded temperatures
Other than scientific experiments, what other methods do scientists use to investigate problems?
Models, Observations, & Research
Models, Observation, & Replication
Models, Repetition, & Replication
Models, Repetition, & Variables
What is the primary purpose of a control group in an experiment?
To provide a standard for comparison
To introduce new variables
To ensure the experiment is biased
To increase the sample size
Which of the following is a characteristic of a good scientific hypothesis?
It is vague and open-ended
It is testable and falsifiable
It is based on personal beliefs
It is a proven fact
In a scientific experiment, what is the dependent variable?
The variable that is changed or controlled
The variable that is measured
The variable that is kept constant
The variable that is irrelevant
What is the role of a placebo in a scientific study?
To treat the experimental group
To serve as a control to compare effects
To enhance the effects of the treatment
To confuse the participants
Which of the following best describes a scientific theory?
A guess based on personal opinion
A hypothesis that has been repeatedly tested and confirmed
An untested idea
A law that has been proven
What is the importance of replication in scientific experiments?
To ensure the results are consistent and reliable
To make the experiment more complex
To introduce new variables
To reduce the cost of the experiment
How does peer review contribute to the scientific process?
By ensuring only popular ideas are published
By allowing scientists to collaborate on experiments
By evaluating the quality and validity of research
By speeding up the publication process
