Integrated Science Midterm Practice

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. Keesha’s setup and data are shown below. What is the outcome variable (dependent variable) in this experiment?

• The number of bubbles produced

• The type of plant placed in the beaker

• The amount of time the bubbles were counted

• The distance of the light source from the plant

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-1

NGSS.MS-LS2-3

Pat has two kinds of plant food, “Quickgrow” and “Supergrow”. What would be the best way for Pat to find out which plant food helps a particular type of houseplant grow the most?

• Put some Quickgrow on a plant in the living room put some Supergrow on a plant of the same type in the bedroom, and see which one grows the most.

• Find out how much each kind of plant food costs, because the most expensive kind is probably better for growing plants.

• Put some Quickgrow on a few plants, put the same amount of Supergrow on a few other plants of the same type, put all plants in the same place, and see which group of plants grow the best.

• Look at the advertisements for Quickgrow and Supergrow to see which one says it helps plants grow the most.

Tags

NGSS.MS-ETS1-3

NGSS.MS-LS1-5

Jenny was conducting an experiment in her science lab and mixed several chemicals. She wrote down the first three chemicals she added, but she was interrupted and forgot to write down the last two chemicals that were part of the solution. What impact will this have on her results?

• Her teacher will value the results of her experiment regardless of her notes

• The results of her experiment will be valid as long as she gets the expected results

• If her records are not accurate, then her results will be inconclusive and unreliable

• If she doesn't write every step down, her results will not be the same when she repeats the investigation

Tags

NGSS.MS-PS1-2

Researchers grew some bacteria in a lab and tested them in several trials. The results are shown in the table. In this experiment, which trial served as the control?

• 1

• 2

• 3

• 4

Sara is studying the human skeletal system. Her classroom has a model skeleton. What main advantage does a model skeleton have over a drawing of a skeleton?

• It shows how the body moves.

• It displays all of the bones at once.

• It displays the skeleton in three dimensions.

• It makes it easier to learn the names of each bone.

Which of the following best explains why the process of water evaporating is a physical change?

• When water evaporates, the substance disappears.

• When water evaporates, the chemical identity of the substance does not change.

• When water evaporates, the molecules break apart into individual atoms.

• When water evaporates, the molecules react with the air.

Tags

NGSS.MS-PS1-4

For many years, researchers hypothesized people developed stomach ulcers from eating spicy foods. Later research showed that a particular bacterium living inside the highly acidic environment of the stomach produced a coating that attacked the stomach lining. This process led to the formation of stomach ulcers. These findings sent researchers looking for an antibiotic that could treat the problem bacteria. Subsequent studies found a host of antibiotics that effectively treat the bacteria and lead to the healing of the ulcers. Which of the following best illustrates the scientific process?

• Unexpected findings can cause scientists to rethink earlier hypotheses.

• Scientists in the same research group tend to view data in the same way.

• Some medical problems, such as ulcers, cannot be treated using exercise.

• Medicine sometimes provides a cure that is worse than the original disease.

The atomic number of Carbon is 6, which means that Carbon atoms always have 6

• Ions

• Protons

• Neutrons

• Valence Electrons

Tags

NGSS.MS-PS1-1

A student holds a book at rest in an outstretched hand. The force exerted on the book by the student is equal to the book's

• Mass

• Weight

• Volume

• Density

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NGSS.MS-PS2-4

What is the source of energy for the Sun?

• Hydrogen fusion

• Internal combustion

• Nuclear fission of metals

• Burning of solar gases

Tags

NGSS.HS-ESS1-1