Unit 2 Review

What is the purpose of an experiment?

• To prove a theory is true

• To demonstrate a known fact

• To make a discovery or test a hypothesis

• To create a new hypothesis

Tags

NGSS.MS-PS1-2

NGSS.MS-PS2-2

Which of the following is the correct definition of an independent variable?

• The variable that you are measuring

• The variable that stays the same throughout the experiment

• The variable that you manipulate or change

• The variable that is affected by other variables

Tags

NGSS.MS-PS3-1

What is the difference between a hypothesis, theory, and law?

• A hypothesis is a well-substantiated explanation, a theory is a testable prediction, and a law is a suggestion

• A hypothesis is a testable prediction, a theory is a well-substantiated explanation, and a law is a rule of nature

• A hypothesis is a rule of nature, a theory is a suggestion, and a law is a well-substantiated explanation

• A hypothesis is a theory, and a law is a rule of nature

What is a meniscus in the context of using a graduated cylinder?

• The bottom of the cylinder

• The volume of the liquid

• The curve shape on the top of a liquid

• The unit of measurement

How would you find the volume of a marble using the displacement method?

• Measure the marble's diameter

• Drop the marble in a graduated cylinder and see how much the water rises

• Weigh the marble and divide by its density

• Measure the meniscus of the water without the marble, drop the marble in, and subtract the initial volume from the final volume

What is the density of oxygen gas if 1.23g occupies a volume of 150mL?

• 1.23 g/mL

• 0.0082 g/mL

• 150 g/mL

• 8.16 g/mL

Which of the following is the correct conversion of 189cm to meters?

• 1.89m

• 18.9m

• 1890m

• 0.189m

Which of the following is the correct conversion of 98mm to meters?

• 0.98m

• 98m

• 9.8m

• 0.098m

Write 0.007 in scientific notation.

• 7 x 10^3

• 0.7 x 10^2

• 7 x 10^-3

• 70 x 10^-2

Write 8.3 x 10^7 in standard notation.

• 830,000,000

• 83,000,000

• 8,300,000

• 830,000