Collect, Analyze, Interpret, & Communicate Data

Based on the data provided, which of the following is the best inference Sara could make?

• The amount of KNO3 that can dissolve in water increases as temperature increases.

• Temperature has no effect on the amount of KNO3 that can dissolve in water.

• The addition of KNO3 causes the temperature of the water to increase.

• There is not enough information provided to make any inferences about the solubility of KNO3.

Tags

NGSS.MS-PS1-2

Zach performed several experiments related to gravity. At the end of one experiment, Zach concluded that the gravitational force between two objects is directly proportional to the mass of the objects. Which set of data did Zach use to form this conclusion?

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Tags

NGSS.MS-PS2-4

Amy is experimenting to see how a truss (a type of support) can strengthen a bridge. Amy builds several models of bridges out of toothpicks. Each model has a different number of trusses. Amy suspends each model between two desks. She then adds lead weights to each bridge, one-by-one, until the bridge breaks. In the chart below, Amy recorded how many lead weights each bridge held before breaking. What is a valid conclusion that Amy can draw from her experiment?

• A. A bridge with 20 trusses could hold 80 lead weights.

• B. A bridge with 14 trusses holds twice as much weight as a bridge with 10 trusses.

• C. The number of trusses a bridge has does not affect the amount of weight the bridge can hold.

• D. Increasing the number of trusses increases the strength of the bridge.

Tags

NGSS.MS-ETS1-2

NGSS.MS-ETS1-3

A scientist conducted an experiment to determine how acids affect a newly discovered metal. The scientist was careful to record the steps of her experiment, as well as her observations and results. What should the scientist do next?

• Report her results to the scientific community.

• Ask the local newspaper to publish her results.

• Come up with a new hypothesis that she can test on the newly discovered metal.

• Hide her results from other scientists so that they won't steal her idea.

Tags

NGSS.MS-LS1-5

Amy designed an experiment to test how exercise affects adult men. The resting heart and respiratory rates were measured in fifty men between the ages of 25-55. Once a baseline was established, the men were asked to run on the treadmill for five minutes. The breathing rate and heart rate were recorded every thirty seconds. What can be inferred from the results of Amy's experiment?

• There is no apparent relationship between exercise and heart rate.

• There is a positive correlation between heart rate and respiratory rate.

• An increase in heart rate correlates with a decrease in respiratory rate.

• There is no apparent relationship between heart rate and respiratory rate.

Sophie wanted to know how long it would take to vaporize 200 mL of a particular liquid, so she set up the apparatus shown below. Sophie monitored the flask and indirectly determined the amount of liquid that remained in the flask by measuring the amount of liquid that had vaporized, condensed in the glass tube, and collected in a beaker at the end of the tube. Making measurements every five minutes is an example of

• making inferences.

• proposing conclusions.

• data analysis.

• systematic observations.

Patty designs an experiment to find out how much water is in an orange. She slices ten oranges, weighs each orange, then dehydrates the slices. When the slices are dry, she again weighs the slices that make up each orange. She puts her data in a table like the following: What data should go in the last column?

• the number of slices

• the difference in weight

• the size of each orange

• the total weight

Tags

NGSS.MS-ETS1-3

The United States Department of Agriculture published results on the quantity of organic farmland in the United States. Accompanying their results was the following:

• graphs

• conventions

• data tables

• conferences

The average monthly temperatures in Lima, Peru are graphed below. Which of the following conclusions could be made from this data?

• It tends to be warmer in February than in August.

• It tends to rain more in July than in December.

• It tends to rain more in February than in August.

• It tends to be warmer in July than in December.

Study the bar graph above. Which city has shown the slowest population growth since 1950?

• City A

• City B

• City D

• City C