GED Science Prep.

Which of the following best states the hypothesis being tested in this study?

• Phytoplankton grow best at the surface of the ocean.

• The amount of light that reaches phytoplankton affects their growth.

• The amount of light that phytoplankton receive must be constant.

• Phytoplankton grow best in the deepest part of the ocean.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-1

NGSS.MS-LS1-5

Based on the results of the study, which of the following best states the relationship between phytoplankton growth and sunlight?

• As sunlight increases, phytoplankton growth decreases.

• As sunlight decreases, phytoplankton growth increases.

• As sunlight increases, phytoplankton growth increases.

• There does not appear to be a relationship between phytoplankton growth and sunlight.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

NGSS.MS-LS2-1

NGSS.MS-LS1-5

According to the graph, at what depth is phytoplankton growth the greatest?

• 0 m

• 50 m

• 100 m

• 200 m

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

What is the best explanation for the results of this study?

• Sunlight increases water temperature, so the more sunlight there is, the warmer the water is, leading to more growth of phytoplankton.

• Phytoplankton concentrate sunlight in an area, so the more phytoplankton there are, the more sunlight there is.

• Phytoplankton are microscopic animals with small body mass, so they tend to float rather than sinking deeper in the ocean.

• Photosynthesis requires sunlight, so the more sunlight there is, the more photosynthesis occurs, leading to more growth of phytoplankton.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

NGSS.MS-LS1-5

The graph of ocean temperature at different depths is similar to that for sunlight. What is the best way for researchers to test if it is sunlight or temperature that is affecting the growth of phytoplankton?

• In the ocean, measure the amount of light, amount of plankton, and water temperature at different depths.

• In the ocean, measure the water temperature and amount of light at several locations, at different depths.

• In the laboratory, shine the same amount of light on different tanks of phytoplankton but keep the water at a different temperature in each tank.

• In the laboratory, shine a different amount of light on different tanks of phytoplankton and keep the water at a different temperature in each tank.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-1

Based on the results of the experiment, which of the following conclusions is most accurate?

• Rods of all sizes travel further than any of the other rock shapes.

• Medium rocks always travel further than rocks of all other sizes.

• Medium and large spheres travel further than medium and large rocks of other shapes.

• Small rocks travel the same distance no matter what shape they are.

If a blade with a mass of 1,400 g were dropped into this stream, how far would it most likely travel after two months?

• 5 m

• 10 m

• 25 m

• 40 m

Reading down a single column in the table allows the researchers to compare the transport of particles of

• the same size but different shapes.

• the same size and same shape.

• different sizes and different shapes.

• different sizes but the same shape.

The researchers hypothesize that small spheres travel less farther than medium and large spheres because they get stuck more easily in the rocky bottom of the stream. What is the best way to test this hypothesis?

• Drop more small spheres into the same rocky-bottomed stream and measure how far they travel after two months.

• Drop small rocks with new shapes, such as cubes and stars, into the same rocky-bottomed stream and measure how far they travel after two months.

• Drop small, medium, and large spheres into a stream with no rocks on the bottom and measure how far they travel after two months.

• Drop small spheres, rods, blades, and discs into a stream with no rocks on the bottom and measure how far they travel after two months.

Tags

NGSS.MS-PS2-2

How many meters did the Athabasca Glacier retreat between 1906 and 1999?

• 851

• 1,186

• 1,302

• 1,510

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS3-5