Unit 1 Chemistry Intro to Measurements

Two groups of students completed the same multiplication test.  The first group was given an apple for the test, the second group was given no snack. What is the independent variable?

• The type of test

• The presence or absence of a snack

• The number of students

• The score on the test

Two groups of students completed the same multiplication test.  The first group was given an apple for the test, the second group was given no snack. What is the dependent variable?

• The type of test

• The presence or absence of an apple

• The number of students

• The score on the test

In the experiment investigating the effect of ibuprofen on stomach acid in mice, what is the independent variable?

• The amount of stomach acid produced

• The environment of the mice

• The dosage of ibuprofen

• The number of mice

In the same experiment with the mice, what is the dependent variable?

• The amount of stomach acid produced

• The environment of the mice

• The dosage of ibuprofen

• The number of mice

Convert 258 cm to millimeters with 3 significant figures.

• 2580 mm

• 258 mm

• 25.8 mm

• 2.58 mm

Convert 250 mL to liters with 3 significant figures.

• 0.250 L

• 2.50 L

• 25.0 L

• 0.025 L

Convert 0.05 g to milligrams with 3 significant figures.

• 50.0 mg

• 50 mg

• 500 mg

• 0.5 mg

Convert 0.23 L to milliliters with 3 significant figures.

• 230. mL

• 23.0 mL

• 2.30 mL

• 2300 mL

What is the base unit for measuring volume?

• Gram

• Liter

• Mole

• Second

What is the base unit for measuring mass?

• Gram

• Liter

• Mole

• Second