Unit 1 DOL

What is a qualitative measurement in chemistry?

• Measurement with numbers and units

• Descriptive, non-numerical form such as color, shape, size, feelings, texture

• Measurement of mass only

• Measurement of temperature only

What is a quantitative measurement in chemistry?

• Descriptive, non-numerical form

• Definite form with numbers AND units, such as mass, volume, temperature

• Measurement of feelings

• Measurement of color only

Fill in the blank: The basketball is round and brown. This is an example of a __________ measurement.

• qualitative

• quantitative

• numerical

• statistical

Fill in the blank: The basketball has a diameter of 31 cm and a pressure of 12 lbs/in². This is an example of a __________ measurement.

• quantitative

• qualitative

• subjective

• relative

What does accuracy refer to?

• The degree of agreement among several measurements

• How close a value is with the true value

• The speed of measurement

• The cost of measurement

What does precision refer to?

• A) The agreement of a particular value with the true value

• B) How close together several measurements are that were made in the same manner

• C) The speed of measurement

• D) The cost of measurement

Accuracy can be determined with ____ measurement.

• 1

• 2

• 3

• 4

Precision requires ____ measurements.

• multiple

• single

• random

• approximate

Refer to the diagram showing four target boards. Which combination is represented by the top left target (all shots clustered tightly at the center)?

• Not Accurate and Precise

• 
• Accurate and Not Precise

• 
• Accurate and Precise

• 
• Not Accurate and Not Precise

• 

What is the meniscus? Fill in the blank: The meniscus is the _______ surface of a liquid in a narrow cylindrical container.

• curved

• flat

• rough

• solid