Biology Benchmark

The instruments shown would be used to observe the —

• external organs of a frog

• skin texture of a frog in a marine environment

• life cycle of a frog

• internal organs of a frog

A biologist wants to investigate how fertilizers with different amounts of nitrogen influence the pollen production of flowers. Select the types of data the biologist should collect.

• The volume of pollen produced by each flower

• Concentration of nitrogen in the different fertilizers

• Amount of rainfall during the study period

• The number of seeds produced by each flower

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

What is a correct hypothesis to the Beak-Size Variation graph?

• During years of dry weather, a bird's beak will not change size.

• Over a ten year period, a bird's beak will fluctuate in size by 2 mm.

• During times of increased precipitation, the size of a bird's beak will decrease.

• Over a ten year period, the size of a bird's beak will range between 9.6 mm and 10.1 mm.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

What hypothesis is most likely being tested using the samples in the figure?

• The amino acid composition of the bacteria

• The ability of bacteria to survive in a lysine free environment

• The ability of bacteria to perform photosynthesis

• The ability of bacteria to survive in a test tube

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

An experiment is designed to determine the effect of green light versus natural light on the growth rate of bean plants. Bean plants of the same types are placed in similar pots with the same soil. They are watered the same amount over 14 days, and their growth is measured. One group of plants is placed in a window sill while another group of plants is placed under a green lamp. What is the dependent variable in this experiment?

• The amount of light

• The height of the plants

• The pH of the soil

• The amount of water

Tags

NGSS.MS-LS1-5

Measurements gathered from observing a pea plant grow 5 cm over a three week period will result in the collection of —-----

• hypotheses

• conclusions

• inferences

• data

A scientist is conducting research on mealworms. Which of the following pieces of equipment should be used by the scientist to determine the mass of each mealworm?

• Beaker

• Ruler

• Electronic balance

• Graduated cylinder

A hypothesis is a statement made by a scientist and —

• is always true

• is usually true

• can be tested

• is the same as a theory

Tags

NGSS.HS-PS1-2

A sample of mice are divided into two groups for an experiment. One group is fed a normal diet and the second group is given the same diet with extra iron. The animals receiving the normal diet are healthy; the animals in the second group are weaker and sickly. What is a possible hypothesis concerning this experiment?

• Extra calories in the diet has a negative effect on the health of mice.

• Extra iron in the diet has a negative effect on the health of mice.

• Living in small groups has a negative effect on the health of mice.

• Lack of sufficient water has a negative effect on the health of mice.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

You suggest that the absence of water could prevent the growth of bread mold. This is —

• a conclusion

• an analysis

• an experiment

• a hypothesis

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4