Ricardo is investigating the effect of salt on how long it takes for water to boil. Ricardo filled five identical beakers with equal volumes of water. Then he added different amounts of salt to each beaker. He then measured the length of time the water took to come to a complete boil. Ricardo’s results appear in the data table shown below. What can Ricardo conclude from this data?

• No conclusion can be made because data were not available for the last sample.

• When the salt concentration in water doubles, the length of time that the water takes to boil also doubles.

• Adding salt lowers the temperature the water must be at to boil.

• The greater the amount of salt in the water, the longer it takes the water to boil

Tags

NGSS.MS-PS1-2

Sunrise and sunset data for Cocoa Beach, Florida, are shown in the table below: Which conclusion can you accurately reach from this information?

• From January to July, it gets colder in Cocoa Beach each day.

• From January to July, there are more hours of daylight each day.

• From January to July, the sun rises later in the morning each day.

• From January to July, the sun sets earlier in the evening each day.

Squidward loves playing his clarinet and believes it attracts more jellyfish than any other instrument he has played. In order to test his hypothesis, Squidward played a song on his clarinet for a total of 5 minutes and counted the number of jellyfish he saw in his front yard. He played the song a total of 3 times on his clarinet and repeated the experiment using a flute and a guitar. He also recorded the number of jellyfish he observed when he was not playing an instrument. The results are shown in the chart.

• Correct, because more jellyfish came for the clarinet than any other instrument

• Incorrect, because the jellyfish came for clarinet and guitar music equally when you add all three trials.

• Correct, because they don't like the music

• Incorrect, because there is not enough data.

Tags

NGSS.MS-ETS1-2

NGSS.MS-ETS1-3

What conclusion can be drawn about the effect of sunlight on the plant growth using the data in the table?

• Alternated sunlight and darkness increases plant growth.

• Direct Sunlight increases plant growth.

• Sunlight decreases plant growth.

• Partial sunlight increases plant growth

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

The table below shows the masses of a piece of gum and its wrapper before and after the gum was chewed by a student. Using the table, which conclusion is most likely correct?

• The chewed gum had a lower mass than the unchewed gum because a substance in the gum dissolved in the student's saliva.

• The mass of the gum remained constant throughout the experiment because the gum did not contain any soluble substances.

• The chewed gum had a greater mass than the unchewed gum because saliva dissolved into the gum as it was chewed.

• The unchewed gum had a greater mass than the chewed gum because it was measured with the wrapper.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The variable that is deliberately changed or manipulated in an experiment. The test variable.

• Independent variable

• Dependent variable

• Control variable

Elena predicts that the volume of a gas-filled balloon will double each time the temperature of the gas in the balloon increases by 5 degrees. She conducts a controlled experiment and records the data below.

How do Elena’s data compare with her prediction?

• The data support her prediction because the volume of the balloon increased.

• The data supports her prediction because it doubled each time the temperature of the gas in the balloon increases by 5 degrees.

• The data cannot be used because she did not collect data when temperatures were exactly 5 degrees apart.

• Elena must collect more data before forming conclusions.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4

Observing the graph, please identify the dependent (outcome) variable.

• Plant height

• Time in days

• Exposure to light

• The type of flower

Tags

NGSS.MS-LS1-5

Keesha did an experiment to study the rate of photosynthesis in the water plant Elodea. She placed a piece of Elodea in a beaker of water and set the beaker 10 centimeters (cm) from a light source. Keesha counted the bubbles released from the plant every minute for five minutes (min). She repeated the process two more times. First, she moved the light to 20 cm from the beaker, and then she moved the light to 30 cm from the beaker.

What conclusion can be drawn using the evidence in the table about the distance of the light from the Elodea plant and the number of bubbles released from the plant?

• As the distance of the light from the Elodea plant increases, the number of bubbles released decreases.

• As the distance of the light from the Elodea plant increases, the number of bubbles released increases.

• The distance of the light from the Elodea plant does not affect the number of bubbles released.

• The number of bubbles released is always the same regardless of the distance of the light.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS1-6

Some variables need to be kept constant while other variables are changed in an experiment. What variables must be kept the same in order for an experiment to be considered "fair?"

• manipulated variable

• controlled variable

• responding variable

• dependent variable

Tags

NGSS.MS-PS2-2