Nature of Science QBA2 Review

Alexander Fleming was a Scottish scientist who studied bacteria. One day, while observing the bacteria he was growing on petri dishes, he noticed that mold had grown on one of them and that no bacteria was growing around the mold. Fleming wondered why this was and began to experiment with mold. After years of research and collecting and analyzing the data, he discovered penicillin, which is an antibiotic that can be used to fight bacterial infections.

Which answer below BEST describes the discovery of penicillin?

• The discovery is not valid because he was not investigating penicillin

• The discovery is valid because the scientist made an observation and collected evidence

• The discovery is not valid because the scientists did not use all of the steps of the scientific method

• The discovery is valid because the discovery was an accident

After Alexander Fleming discovered and invented penicillin, what should he have done next?

• share his results with other scientists

• analyze the data he has collected and draw conclusions

• conduct investigations and collect data

• create a hypothesis

Tags

NGSS.MS-LS1-5

Students investigated how different colors of construction paper in a solar oven affect the heating of water. Which graph correctly represents the data for the brown construction paper?

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Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-1

NGSS.MS-PS3-4

Students went through the colony of Tenebrio beetles in their classroom and separated the life cycle stages into three groups.

Which graph correctly represents the data?

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Over many decades while surveying deep space, scientists have spotted unknown objects. While the scientists still are not sure what all of the objects are, their observations give them clues. Some of their observations are shown below.

Based on the information above, which scientist did not link their explanation to a verified observation?

• Scientist 1

• Scientist 2

• Scientist 3

• Scientist 4

A team of scientists working at the Tonantzintla Observatory in Cholula Mexico think they may have discovered a new comet in our solar system. Before they made their announcement, they recorded as much information about the new comet as they could. Some of their records are shown below.

Which piece of information from the scientists’ notebook was a verified observation?

• This discovery will make our observatory famous

• Other scientists will be interested in this comet

• This comet probably came from another star

• The comet is 125 miles long and 24 miles wide

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NGSS.MS-ESS1-3

Sania wanted to find out if different types of liquids such as water, soda, orange juice, and milk had different masses. She poured each liquid into a graduated cylinder and then used a digital scale to determine their mass. Below are the materials that Sania used to complete her investigation.

Study the description of Sania’s investigation above. Which of the following variables does she need to keep the same throughout the investigation?

• only the type of liquid

• everything except the type of liquid

• only the amount of liquid used

• everything, she is allowed to change any variable

Tags

NGSS.MS-PS1-2

Carlo wanted better understand how the temperature of the water affects the Okaloosa Darter fish throughout its life cycle. The Okaloosa Darter fish is an endangered species of fish that lives in the panhandle of Florida. This particular species of fish is estimated to have a life span of about 5 years.

12 Carlo wanted better understand how the temperature of the water affects the Okaloosa Darter fish throughout its life cycle. The Okaloosa Darter fish is an endangered species of fish that lives in the panhandle of Florida. This particular species of fish is estimated to have a life span of about 5 years.

• Controlled Experiment: He should put several Okaloosa Darter fish in fish tanks in his lab and observe what happens when he changes the temperature of the water

• Descriptive Investigation: He should record the temperature of the water one day while making observations of the Okaloosa Darter fish

• Comparative Investigation: He should record the temperature of the water one day while making observations of several fish species, and they compare the information

• Repeated observation: He should record the temperature of the water several times a month for 5 years while observing the Okaloosa Darter fish.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-4