Lab Skills & Physical Science Final Exam Review (7th)

What is the diameter of the ball?

• 6.0 cm

• 8.0 cm

• 14.0 cm

• 17.0 cm

What is the volume of the sphere?

• 25 mL

• 15 mL

• 40 mL

• 65 mL

During a laboratory activity, a student combined two solutions. In the laboratory report, the student wrote “A yellow color appeared.” The statement represents the student’s recorded

• hypothesis

• inference

• conclusion

• observation

Tags

NGSS.MS-PS1-2

An interpretation based upon an observation is called

• a fact

• an inference

• a measurement

• a classification

Which statement describes two unsafe laboratory practices represented in the diagram?

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

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

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

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

The approximate water temperature at a depth of 125 meters would be approximately _____ °C.

• 18

• 15

• 8

• 4

What is the lowest possible total magnification that can be obtained using the microscope shown below?

• 20×

• 40×

• 800×

• 200×

When a test tube of water containing elodea (an aquatic 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 independent variable in this experiment is the

• concentration of gas in the water

• amount of water in the test tube

• distance of the plant from the light

• type of aquatic plant in the test tube

Tags

NGSS.MS-LS1-6

NGSS.MS-LS1-7

What is the length of only section A? (Note: Answers have different units)

• 4.5 cm
• 11.6 cm

• 23.0 mm

• 7.6 cm

An experiment is carried out to determine how different pH values of soil will affect the growth of tomato plants. In this experiment, the dependent variable could be the

• pH of the soil

• pH of enzymes in tomato leaf cells

• specific variety of tomato plants used

• height of the tomato plants

Tags

NGSS.MS-LS1-5