Q1 Exam Review

Base your answer on the diagram below and on your knowledge of biology. Which statement describes two unsafe laboratory practices represented in the diagram?

• The flame is too high and the test tube is unstopped.

• The opening of the test tube is pointed toward the student and the student is not wearing goggles.

• The test tube is unstopped and the student is not wearing goggles.

• The beaker has water in it and the flame is under the tripod.

Which statement represents an unsafe procedure for heating a nutrient solution in a flask?

• heat the solution at the lowest temperature possible on a hot plate

• stopper the flask tightly to prevent evaporation of the solution

• use a Bunsen burner to heat the solution

• stir the solution while it is heating

The removal of mitochondria from a typical animal cell would have an immediate effect on the cell's production of

• DNA

• oxygen

• ATP

• glucose

Tags

NGSS.HS-LS1-7

Which statement about the use of independent variables in controlled experiments is correct?

• A different independent variable must be used each time an experiment is repeated.

• The independent variables must involve time.

• Only one independent variable is used for each experiment.

• The independent variables state the problem being tested.

Tags

NGSS.MS-PS2-2

How does the CONTROL GROUP setup in an experiment differ from the other setups in the same experiment?

• It tests a different hypothesis.

• It has more variables.

• It does not receive the experimental treatment (Independent Variable).

• It utilizes a different method of data collection.

Which statement best describes a hypothesis?

• A hypothesis is the process of making careful observations.

• The conclusion drawn from the results of an experiment is part of a hypothesis.

• A hypothesis serves as a basis for determining what data to collect when designing an experiment.

• The facts collected from an experiment are written in the form of a hypothesis.

An ameba, a one-celled organism, can move, ingest, and transport materials within the cell, because it has

• organs

• organelles

• tissues

• systems

Tags

NGSS.MS-LS1-2

Which sentence is a possible hypothesis that was tested in this experiment?

• Does the pH of water affect the growth of radish plants?

• Will the amount of water alter the heights of the radish plants?

• The temperature of the water will affect the heights of the radish plants.

• The pH of the water will affect the heights of the radish plants.

Tags

NGSS.MS-LS1-5

What was the dependent variable in this experiment?

• heights of the plants

• pH of the water

• temperature of the water

• type of soil

Tags

NGSS.MS-LS1-5

Which activity might help to increase the validity of this experiment?

• repeating the experiment several times

• using two different types of radish seeds in each group

• using the same pH for both groups of plants

• placing one set of plants in sunlight and one in darkness

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2