Unit 1 Test review

A researcher notices that elephants seem to communicate with one another over long distances. When the elephants are communicating, the researcher cannot hear any sounds. The researcher hypothesizes that the elephants are making subsonic sounds that humans are unable to hear. How might the researcher test this hypothesis?

• Use trained dogs to detect subsonic sounds to observe how they respond to elephants' communication

• Cover the elephants' ears and observe how they behave around other elephants

• Send out a variety of subsonic sounds to observe how the elephants respond

• Stand close to elephants in order to hear the communication between them.

Tags

NGSS.MS-PS4-2

What is a valid conclusion that can be drawn from the results on the graph?

• As the temperature increased the amount of solute dissolved increased

• As the temperature increased the amount of solute dissolved decreased

• Temperature has no impact on the amount of solute dissolved in a solution

• There are no solutes in solutions

Tags

NGSS.MS-PS1-2

That this animal has fur is an...

• inference
• conclusion
• observation
• opinion

The dependent variable in this experiment is - 

• Number of Bacteria
• Time of Incubation
• Culture Number
• Type of Bacteria

Tags

NGSS.MS-LS1-5

What can you infer about the temperature for E.coli bacterial growth?

• E. coli does not grow well at low and high temperatures.
• E coli will continue to grow at very high temperatures.
• E.coli grows best at very low temperatures
• E.coli grows best at very high temperatures.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-4

Sabrina wants to test which brand of popcorn pops the most kernels.  She picked a store brand, Orville Redenbacher, and PopSecret.  All three bags started with the same number of kernels.  She popped each for 3 minutes in the same microwave, and then counted the number of kernels left over.  What is her independent variable?

• Number of kernels left over
• Brand of popcorn
• number of kernels before popping
• length of time cooking

Counting the number of barnacles on a boat would be what type of data?

• qualitative

• quantitative

• quick

• quiver

A student conducted an experiment about the movement of a marble through four different liquid substances. Looking at the figure designed by the student, what is an error in his experiment?

• The amount of liquid substances used is not consistent.
• The type of liquid substances are not labeled correctly.
• The type of marble used is not consistent.
• The marbles are not dropped from the same distance.

Tags

NGSS.MS-PS2-2

What is an appropriate hypothesis for this experiment?

• If a snake is placed in an environment with heated and unheated rocks, the it will lay on the heated rock.

• If a snake is placed in an environment with another snake, then the two snakes will mate.

• If a snake is placed in an environment with dead and living prey, then the snake will eat the living prey.

• If a snake is placed in an environment with glass and wire, then the snake will live surrounded by wire.

Tags

NGSS.MS-LS1-5

Which statement best describes the nature of science?

• The nature of science is for scientists to prove that their hypotheses are correct.

• The nature of science is to recreate nature in the laboratory.

• The nature of science is for scientists to prove their point of view is correct.

• The nature of science is to investigate and understand the natural world and to use this understanding to make useful predictions.