AnswersChemistryThe Processes of Science

The Processes of Science — Test Answers

25 verified answers
1
Free Preview

Which three of the five items would be best to include in a safety contract?

A
2, 3, and 4
B
1, 2, and 5
C
3, 4, and 5
D
1, 2, and 3
2
Free Preview

What would a scientist do to best communicate these data to other scientists in a presentation?

A
Make a graph for better visual representation.
B
Display only rows 1, 3, and 6 of the data to simplify results.
C
Change the unit of pressure to atm.
D
Replace the table with text highlighting pressures.
3

Which tool was most likely used in a procedure if the lab report shows that approximately 300 milliliters of water was used?

A
a beaker
B
a pipette
C
a graduated cylinder
D
a volumetric flask
4

What is the best reason for a student to remove a dangling bracelet when heating test tubes of acidic solutions in a hot-water bath in a chemistry lab?

A
to minimize the chance the bracelet pulling over a test tube, causing a spill
B
to prevent misreading the temperature of the bath on a thermometer
C
to reduce the risk of burns from heat conducted through the metal
D
to avoid reactions of the metal with gases in the lab
5

Thomas records the masses of several rocks as 7.40 g, 7.85 g, 7.60 g, and 7.40 g. What is the mode of Thomas’s data set?

A
0 point 4 5
B
7 point 4 0
C
7 point 5 5
D
7 point 6 0
6

How is the mode of a data set defined?

A
It is the most common value in the set.
B
It is the middle value of the set.
C
It is the difference between the highest and lowest values of the set.
D
It is the average of the different values in the set.
7

What is one advantage of using a computer over a graphing calculator?

A
Computers are more useful for quick calculations.
B
Computers are easier to transport to remote locations.
C
Computers hold larger amounts of data.
D
Computers have lower power consumption.
8

Jaime calculates the density of a slab of aluminum (Al) metal. What information does Jaime need to evaluate the accuracy of his calculation?

A
a line graph that shows how the density of aluminum varies with temperature
B
the accepted value for the density of aluminum
C
a bar graph that shows the densities of different slabs of aluminum
D
the dimensions of the slab of aluminum that he used
9

Chris is about to do an experiment to measure the density of water at several temperatures. His teacher has him prepare and sign a safety contract before beginning the experiment. Which item is most likely part of the safety contract?

A
Bring an electronic copy of the MSDS on a personal laptop.
B
Do not discuss the experiment with other students in the lab.
C
Inspect the glassware for cracks or chips prior to beginning the lab.
D
Understand how to deal with water safely in the lab.
10

Eleanor wants to show her class a comparison of melting rates between two different solids when heat is applied. Why would a graph be more suitable than a table to show her data?

A
Graphs have data points with more significant figures.
B
Graphs better illustrate precise data points.
C
Graphs are better suited for numeric analysis.
D
Graphs better illustrate the comparison of two different data sets.
11

A scientist wants to use a model to help present the results of his detailed scientific investigation. Why would a model be useful?

A
because the model is easy to put together and to use
B
because the model makes the concepts easier to understand
C
because the model requires the audience to pay full attention to it
D
because the model prevents other scientists from asking questions
12

Which is always the first step in dealing with an accident in the lab?

A
Read the MSDS information.
B
Notify the teacher.
C
Call the fire department.
D
Call the emergency number, 911.
13

Which of these steps would most likely be part of a lab procedure?

A
Create a question on the cause of a chemical reaction.
B
Record the time to complete a chemical reaction.
C
Write a hypothesis to answer a question.
D
Write a title at the top of a completed lab report.
14

Ben will be conducting an experiment in which he reacts metals with different concentrations of acid in test tubes. What should Ben wear to best protect himself during the experiment?

A
goggles, a lab coat, chemical gloves, and close-toed shoes
B
a lab coat, chemical gloves, and close-toed shoes
C
heat-proof gloves, a lab coat, and close-toed shoes
D
goggles, a lab coat, and heat-proof gloves
15

What are close-toed shoes least likely to provide protection against?

A
acid leaking from a cracked beaker
B
spilled water from a hot-water bath
C
broken glass from a dropped test tube
D
hydrogen gas produced during a reaction
16

Miranda gets a small cut on her thumb after she breaks a beaker, and she begins to look around for the lab first aid kit. What important first step should she have taken?

A
She should have first called a doctor or a nurse.
B
She should have first called 911.
C
She should have first notified the teacher.
D
She should have first informed her whole class.
17

The teacher prepares 2 point 5 0 liters cap l of a salt solution for a class experiment. How many quarts qt are in 2 point 5 0 liters ? open paren 1 liter is equal to 1 point 0 6 quarts close paren

A
2 point 6 5 quarts
B
2 point 3 6 quarts
C
2 point 1 7 quarts
D
2 point 5 2 quarts
18

Which is an example of making a qualitative observation?

A
describing how copper changes color in chlorine
B
recording how long it takes to burn magnesium
C
showing the results of an experiment with a graph
D
measuring the speed of the chemical reaction
19

Which tool can be used to measure the volume of a liquid to one decimal place?

A
a test tube
B
a thermometer
C
a graduated cylinder
D
an Erlenmeyer flask
20

Which of these units is most appropriate for describing a 26-mile marathon run?

A
nanometer
B
kilometer
C
gigameter
D
terameter

Did you find these answers helpful?

More from this Course

Quiz
23 verified answers

Test

Quiz
10 verified answers

Quiz

Quiz
10 verified answers

Quiz