Do Science

Smart Science

Evidence

Repeat and Replicate

100

Which of the following is not part of a scientific investigation? 

A. performing a controlled experiment
B. using a model to test a hypothesis
C. observing how five caterpillars change into butterflies
D. writing a letter about why it's important to protect plants and animals 

D. writing a letter about why it's important to protect plants and animals

200

A prediction must be testable. Which of the following is a testable prediction? 

A. Blue is the best color.

B. Summer is better than Fall. 

C. Dogs are better than cats.

D. A beagle can jump higher than a Persian cat. 

 

D. A beagle can jump higher than a Persian cat. 

300

Some scientific tools are used for making observations, and others are used for making measurements. Which of these tools would be most useful for observing the behavior of ants? 

A. hand lens

B. metric ruler

C. electronic balance 

D. graduated cylinder  

A. hand lens

400

Students look out a window for 5 minutes. They record the number, the type, and color of vehicles that pass. What are the students doing? 

A. concluding 

B. experimenting

C. predicting

D. observing

D. observing

500

Antonio observes the weather one afternoon. He concludes that thunderstorms are likely. Which observation best supports his conclusion? 

A. There is light wind. 

B. The temperature is 20C (75F).

C. The winds are blowing from the East. 

D. The clouds are mainly cumulonimbus. 

D. The clouds are mainly cumulonimbus.

100

John observes that snow is dry, light, and fluffy at times. At other times, snow is wet, heavy, and sticky. John wonders what makes snow different. He wants to plan an experiment to find an answer. Why should John research his question before experimenting? 

A. to make it easier to share results

B. to find informaitn to help setup his experiment

C. to decide whether the scientific method should be used

D. to reduce the number of steps needed for the experiment 

B. to find information to help setup his experiment 

200

Kim places a cup of cooking oil and a cup of water in the freezer. Every 30 minutes, Kim checks the cups. She records the time when the liquid in each cup freezes. Which question is Kim investigating? 

A. Which liquid freezes faster, water or cooking oil? 

B. Which liquid tastes better frozen, water or cooking oil?

C. Which item floats better, frozen water or frozen oil?

D. Which item melts faster, frozen water or frozen cooking oil? 

A. Which liquid freezes faster, water or cooking oil? 

300

Franz wants to investigate moon craters. He drips water into a shallow pan of flour. He holds the dropper at a different height each time he moves to a new area of the pan. Franz observes that the water drops make dents of differing sizes in the flour. Which type of experiment is Franz conducting? 

A. modeling

B. surveying

C. classifying 

D. directly studying

A. modeling

400

Sarah is studying water. She thinks that adding salt to water may make it freeze at a higher temperature. Which word describes her statement? 

A. conclusion 

B. prediction 

C. investigation 

D. variable

B. prediction 

500

Connor and Dylan studied how far two toy pull-back cars travel. Each student pulled a car back and let it go. Then they measured how far each car traveled before it stopped. What part of the inquiry process did the students do? 

A. made a prediction

B. drew a conclusion

C. conducted an investigation

D. communicated their results 

C. conducted an investigation 

100

Imagine that a scientist suggests that the size of an insect population depends on the temperature. What observations must this scientist make in order to collect evidence to suport his or her prediction? 

A. The scientist must observe the insect population only in winter. 

B. The scientist must observe the insect population in the laboratory. 

C. The scientist must observe the insect population in different areas. 

D. The scientist must observe the insect population throughout the year. 

D. The scientist must observe the insect population throughout the year. 

200

Kyle is wondering what he is getting for his birthday. He decides to shake the box that contains his present. Kyle did not realize it, but he was acting like a scientist. What was the first step Kyle took in this situation that a scientist also takes? 

A. asking a question
B. collecting evidence
C. drawing a conclusion
D. developing an explanation 

A. asking a question 

300

Joseph wonders what kinds of birds live in his neighborhood. What skill will Joseph use to investigate the variety of birds in his neighborhood?

A. infer
B. observe
C. order
D. communicate 

B. observe 

400

What is the reason for scientific investigations? 

A. to practice doing experiments

B. to learn about recent discoveries 

C. to demonstrate scientific procedures 

D. to answer questions about the natural world 

D. to answer questions about the natural world 

500

Researchers at Florida International University surveyed people to find out how many wouold not evacuate if a hurricane were approaching. In 1992, 18% would not evacuate. In 1995, 34% would not evacuate. In 1999, 46% said they would not evacuate. How can scientists use this information? 

A. to predict where people go when they evacuate 

B. to explain why people choose not to evacuate 

C. to predict how many people will not evacuate 

D. to predict which route people will use to evacuate 

C. to predict how many people will not evacuate 

100

Becker did an experiment. Separately, Tracy did the exact same experiment. Becker and Tracy found they each got very different results. Which of the following is the best thing for Becker and Tracy to do?

A. Find the average of each set of results and use it.
B. Accept the set of results they think is most correct.
C. Combine all the results into one set and use the new set.
D. Reject both sets of results and perform the experiment again. 

D. Reject both sets of results and perform the experiment again. 

200

Scientists communicate their results by publishing their work. Why is it important for scientists to do this? 

A. to learn from each other

B. to keep their work secret

C. to compete with other scientists 

D. so the experiments are not repeated 

A. to learn from each other. 

300

Sometimes scientists replicate the research of other scientists. Which of the following is the most likely reason scientists do this? 

A. to form new theories
B. to improve the research
C. to win prizes for their work
D. to verify that the work is accurate 

D. to verify that the work is accurate

400

Why is it important to measure very carefully in an investigation? 

A. to practice measuring skills

B. to keep good records 

C. so others can replicate the work 

D. to test the accuracy of tools 

C. so others can replicate the work 

500

Taylor put the same amounts of water, sugar, and yeast into three balloons. Then she put each one in a place with a different temperature and observed the changes. If someone wanted to replicate Taylor’s experiment, what other information would they need?

A. the mass of each balloon and what was in it
B. the temperature where each balloon was placed
C. the size of the table where each balloon was placed
D. the total mass of all the balloons and what was in them 

B. the temperature where each balloon was placed 

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