Science: Matter and Energy - Quiz 3 (Sections 2.1-2.2)

Nora is measuring the thickness of a thin wire using a micrometer. Which of the following measurements recorded by Nora has two significant digits?

• 0.01

• 0.010

• 10

• 10.00

Samuel measures the length of a table and writes down "2.5" in his notebook. Which of the following statements best explains why Samuel's measurement must include units?

• A measurement must have units from a standard system.

• Units aid communication with other scientists.

• Units must match the quantity being measured.

• A measurement must have units to be meaningful.

Sage measured her rectangular house as 15.24 m long and 9.1 m wide. Using her calculator, she multiplied the length by the width to determine that the area is 138.684 m². What should she do next to express this value in proper significant digits?

• Record all digits her calculator shows.

• Round to the last significant place in the least accurate measurement.

• Round to the number of digits in the least significant value.

• Round to as many digits as the largest value.

Aria is writing a science report and needs to express the number 5793 in proper scientific notation. Which of the following should she use?

• 5793 x 10^3

Mia is measuring the total length of two pieces of ribbon. The first piece is 2.03 meters long and the second piece is 1.972 meters long. She adds them together and gets 4.002 meters. Which of the following answers is expressed using proper significant digits?

• 4

• 4.0

• 4.00

• 4.002

James is setting up a workshop and wants to ensure that all measurements taken are consistent. Which of the following is a specific measure to which other measures are compared to ensure uniformity?

• standard of measure

• standard of precision

• base of measure

• base of uniformity

Jackson is using a thermometer to measure the temperature of a liquid. What is the closeness of his measurement to the liquid's actual temperature?

• accuracy

• precision

• error

• uncertainty

Arjun is measuring the distance for a school project and finds that the length is 1,000 meters. What unit prefix should Arjun use to represent "one thousand" meters?

• kilo-

• milli-

• centi-

• deci-

Olivia is working on a science project and needs to measure the length of a table. She uses a system of measurement developed in France that uses prefixes attached to base units to make new units. What system is Olivia using?

• metric system

• imperial system

• customary system

• CGS system

Charlotte is comparing the number of apples in two baskets and finds that both baskets have the same amount. What is a mathematical statement that shows two expressions are equal?

• equation

• variable

• function

• inequality