1.1 Practice of Science

Which of the following best describes a hypothesis in a scientific investigation?

• A proven fact

• A testable explanation for an observation

• A list of materials

• A final conclusion

What is the main purpose of using repeated trials in a scientific experiment?

• To make the experiment more interesting

• To increase the reliability of the results

• To use more materials

• To finish the experiment faster

Tags

NGSS.MS-PS2-2

What is the value of a hypothesis that is not supported by the data?

• It is useless

• It can lead to further investigations

• It must be ignored

• It is always wrong

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-4

Which of the following is an example of empirical evidence?

• A scientist’s opinion

• Data collected from an experiment

• A guess about what will happen

• A story from a textbook

Tags

NGSS.MS-PS1-2

When planning a scientific investigation, what is the first step?

• Collecting data

• Defining the problem

• Analyzing results

• Drawing conclusions

Tags

NGSS.MS-PS2-2

Which of the following best describes replication in a scientific study?

• Repeating the experiment by different scientists

• Using the same materials for every trial

• Changing the hypothesis each time

• Only doing the experiment once

Which of the following is NOT a characteristic of scientific investigations?

• Use of logical reasoning

• Collection of empirical evidence

• Application of imagination

• Ignoring data that does not fit

Tags

NGSS.MS-LS1-5

NGSS.MS-PS1-2

A student collects data and organizes it into a table. What should the student do next to interpret the data?

• Make a prediction

• Analyze the information

• Change the hypothesis

• Start a new experiment

Tags

NGSS.MS-PS1-2

Given a set of data from repeated trials, how can you determine if your results are reliable?

• If the results are the same each time

• If the results are different each time

• If the results are not recorded

• If the results are only estimated

A student wants to test how sunlight affects plant growth. The student has 3 of the same plants but they are given different amounts of sunlight. The growth of the plant is tracked for 2 weeks. What is the test (independent) variable of this experiment?

• Amount of water

• Amount of sunlight

• Type of soil

• Type of plant

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1