Unit 1

A student observes that an organism is green. A valid

conclusion that can be drawn from this observation is

that

• the organism must be a plant

• the organism cannot be single celled

• the organism must be an animal

• not enough information is given to determine whether the organism is a plant or an animal

A student is investigating the effect of different

factors on the growth of a certain type of bean plant

over 30 days. Which factor would not function as a

variable in this investigation?

• type of bean plant

• soil moisture content

• amount of light

• tempreture

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

A scientist would like to test the effect of heat on the

function of a certain enzyme. Which would not be an

appropriate first step?

• doing research in a library

• having discussions with other scientists

• completing a data table of expected results

• using what is already known about the enzyme

Tags

NGSS.MS-ETS1-1

The analysis of data gathered during a particular

experiment is necessary in order to

• formulate a hypothesis for that experiment

• develop a research plan for that experiment

• design a control for that experiment

• draw a valid conclusion for the experiment

Tags

NGSS.MS-PS1-2

Why do scientists consider any hypothesis valuable?

• A hypothesis requires no further investigation.

• A hypothesis may lead to further investigation even if its disproved by the experiment

• A hypothesis requires no further investigation if

  it is proved by the experiment.

• A hypothesis can be used to explain a conclusion

  even if it is disproved by the experiment.

Tags

NGSS.MS-LS1-5

• X, only

• Y, only

• Z, only

• both X and Y

Tags

NGSS.HS-LS1-3

In a scientific investigation, after the question is

asked, the next step is to

• formulate a hypothesis

• identify needed equipment

• design the experiment

• collect the data

When a test tube of water containing an elodea plant

is placed near a bright light, the plant gives off gas

bubbles. When the light is placed at different

distances from the plant, the rate of bubbling is

affected. The experimental variable in this

demonstration is the

• concentration of gas in the water

• type of aquatic plant in the test tube

• amount of water in the test tube

• distance of the plant from the light

Tags

NGSS.MS-LS1-6

NGSS.MS-LS1-7

• 30%

• 55%

• 75%

• 95%

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

A student conducted an original, well-designed

experiment, carefully following proper scientific

procedure. In order for the conclusions to become

generally accepted, the experiment must

• contain several experimental variables

• be repeated to verify the reliability of the

  data

• support the original hypothesis

• be conducted by a scientist

Tags

NGSS.MS-PS2-5