7th Grade - The Practice of Science Test review

Daniel and Alex are both scientists. Daniel is investigating different fuel sources for cars in the future.  He conducts three trials and then shows Alex his results from each trial. Alex is confused about Daniel’s results, so he decides to conduct the investigation for himself.  Which scientific process did each scientist use?  

• Emma and Liam used each other's data to compare their results.

• Emma and Liam used the same hypothesis to compare their results.

• Emma used repetition in her experiment while Liam used replication.

• Emma used replication in her experiment while Liam used repetition.

A group of students is conducting an experiment to investigate the effects of different concentrations of saltwater on the growth of plants. They set up multiple plant groups and water each group with a different concentration of saltwater solution. After a month, they measure the height of the plants in each group. What is the independent variable in this investigation?

• Type of plant used

• Height of the plants

• Concentration of saltwater solution

• Time period of the experiment

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Emily conducted an experiment to investigate the effect of different types of music on the time it takes for people to complete a puzzle. She had three groups of participants: Group A worked on the puzzle in silence, Group B listened to classical music, and Group C listened to rock music. The time it took each group to complete the puzzle was recorded. What was the dependent variable in Emily's experiment?

• The type of music

• The time it took to complete the puzzle

• The number of participants in each group

• The location where the experiment was conducted

A group of students is conducting an experiment to determine which type of paper towel absorbs water the fastest. They have three different brands of paper towels and plan to test them using various methods. Which student's experimental design is most likely to provide reliable data for their investigation?

• Maria: Drips the same amount of water on each paper towel and records the time it takes for the water to be completely absorbed.

• Liam: Drips different amounts of water on each paper towel and records how much water is left after a certain time period.

• Emily: Cuts the paper towels into various shapes, drips the same amount of water on each, and records the time it takes for the water to be completely absorbed.

• Alex: Drips different amounts of water on each paper towel, folds them in different ways, and records how fast the water is absorbed in each fold.

Tags

NGSS.MS-ETS1-2

An engineer conducted an experiment to study the relationship between the temperature of a gas and its pressure. The data collected is presented in the graph.

Based on the data, what conclusion can be drawn?

• As the temperature of the gas increases, its pressure decreases.

• As the temperature of the gas increases, its pressure remains constant.

• As the temperature of the gas increases, its pressure increases.

• As the temperature of the gas increases, its pressure shows no consistent pattern.

Tags

NGSS.MS-PS1-4

Alex is planning to grow plants from seeds. He wants to find out which temperature is better for growing these plants. He sets up his experiment as shown below. Alexis's teacher tells him to review his experimental design for errors. What error did his teacher find in his experimental design?

• He changed too many variables in the experiment.

• The temperature for each plant were not the same.

• He should have used different types of plants for each treatment.

• The pots for the plants were not of the same size.

Tags

NGSS.MS-ETS1-1

NGSS.MS-LS1-5

Four groups of students conducted investigations to determine how different amounts of water affect the growth of bean plants. Each group used different procedures and collected different data. What is the most likely cause of the variation in data between the groups?

• The types of beans used

• The size of the pots

• The amount of sunlight received

• The different procedures used in each group

Tags

NGSS.MS-LS2-1

Carlos conducted an experiment to investigate the effects of different fertilizers on plant growth. He carefully documented the procedures and equipment used, as well as his observations and measurements. He shared this information with Emily, who wanted to verify the results. Emily recreated Carlos's experiment using his documented procedures. What concept best explains how Emily's actions are an example of scientific practice?

• Collaboration

• Hypothesis testing

• Replication

• Data analysis

A group of scientists wants to study the migration patterns of a particular species of birds. They aim to track the birds' movements over several years to understand their routes and behaviors. What would be the most effective method for the scientists to use in this study?

• Conduct controlled experiments in a laboratory setting to mimic the birds' migration patterns.

• Interview local residents to gather anecdotal information about bird sightings and migration.

• Attach tracking devices to individual birds to monitor their movements and gather data.

• Analyze historical records of bird sightings from previous centuries to identify migration patterns.

Tags

NGSS.MS-LS2-4

A chemistry student is investigating how the concentration of a reactant affects the rate of a chemical reaction. The student sets up multiple reaction vessels with different concentrations of the reactant and measures the time it takes for the reaction to occur. One vessel with a standard concentration serves as the control. What type of investigation is the student conducting?

• Descriptive investigation, as data is being analyzed.

• Experimental investigation, as it includes collecting data.

• Comparative investigation, as multiple trials are being conducted.

• 
  Experimental investigation, as it includes control and experimental groups.

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Tags

NGSS.HS-PS1-5