Chapter 1

Vocabulary

100

Standard

What is an exact quantity that people agree to use to compare measurements?

200

Volume

What is the amount of space occupied by an object?

300

Technology

What is the application of science to help people?

400

Mass

What is the amount of matter in an object?

500

Dependent Variable

What is a variable that changes as another variable changes?

Check Concepts

100

Which of the following is an example of an SI unit?

A) Foot

B) Second

C) Pound

D) Gallon

200

One one-thousandth is expressed by which prefix?

A)Kilo-

B)Nano-

C)Centi-

D)Milli-

300

On which of the following is SI based?

A) Inches

B) Powers of five

C) English units

D) Powers of 10

400

What is the symbol for deciliter?

A) dL

B) dcL

C) dkL

D) Ld

500

Which of the following is NOT a derived unit?

A) dm³

B) m

C) cm³

D) g/ml

Think Critically

100

Identify three technological items that you value that might not be important in a developing country.

Answers will vary.

200

Identify when bias occurs in scientific experimentation. Describe steps scientists can take to reduce bias and validate their experimental data.

Bias occurs when a scientist's expectations about the experiment change how he or she views the results. Running multiple trials, keeping accurate records of measurable data, peer review, and designing experiments that can be repeated reduces bias and helps validate data.

300

Describe - Not all objects have a volume that is measured easily. if you were to determine that mass, volume, and density of your textbook, a container of milk, and an air-filled balloon describe how you would do it?

Textbook volume could be determined by multiplying the book's length, width, and height. The volume of the balloon could be determined by measuring the volume of water it displaces. The volume of any irregular object, such as the milk carton, must be determined indirectly. if the object is not harmed by water, volume can be measured by water displacement.

400

Suppose you set a glass of water in direct sunlight for 2 hours and measure its temperature every 10 min. What type of graph would you use to display your data? What would be the dependent variable be? What would the independent variable be?

A line graph; time would be the independent variable and temperature would be the dependent variable.

500

A metal sphere is found to have a density of 5.2 g/cm³  at 25 degrees C and a density of 5.1 g/cm³ at 50 degrees C. Form a hypothesis to explain this observation. How could you test your hypothesis?

The metal likely expands when heated. The hypothesis can be tested by measuring the volume of the sphere at the two temperatures.

Apply Math

100

Make the following conversion. 1,500 mL to L

1.5 L

200

Make the following conversion. 2 km to cm

200,000 cm

300

Make the following conversion. 5.8 dg to mg

580 mg

400

Make the following conversion. 22 degrees C to K

295 K

500

Calculate the density of an object having a mass of 17 g and a volume of 3 cm³.

D=m/v

m=17 g

v=3 cm³

D=17 g/3 cm³ = 5.7 g/3 cm³

More Vocabulary

100

Graph

What is a visual display of data?

200

Experiment

What is a test set up under controlled conditions?

300

Control

What is a variable that does NOT change as another variable changes?

400

Density

What is the mass per unit volume?

500

Hypothesis

What is an educated guess using what you know and observe?