AnswersCrowley Credit Recovery Physics ASafety in Science

Safety in Science — Unit test Answers

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The MSDS for sodium hydroxide gives it a health rating of 3, a flammability rating of 0, and a reactivity rating of 1. According to the MSDS, which best describes sodium hydroxide?

A
highly corrosive but not highly flammable
B
highly reactive and corrosive
C
highly flammable but not highly corrosive
D
not highly reactive or corrosive
2
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Which is the SI symbol for volume?

A
m
B
g
C
L
D
K
3

Wanda and Marita are drinking bottles of water. Each girl sounds a different musical note by blowing across the top of her bottle.What is a good hypothesis that could lead to new experimentation?

A
It is more fun to play musical notes with carbonated water than with normal spring water.
B
If the lid on a bottle is tightly closed, then blowing across the top of the bottle will not make a musical note.
C
Blowing across the top of a bottle can make a musical note.
D
If there is less water in the bottle, then the note played is lower because there is more air to move around.
4

Which action do researchers take to make advances in science?

A
They guard their findings against the scrutiny of outside sources.
B
They share their experimental results with other researchers.
C
They reduce their participation in working with other scientists.
D
They announce their findings in newspapers to avoid peer review.
5

What does a triple-beam balance require the user to do?

A
add the numbers from the three sliders to determine the mass of an object
B
multiply the numbers from the three sliders to determine the mass of an object
C
add the numbers from the three sliders to determine the volume of an object
D
multiply the numbers from the three sliders to determine the volume of an object
6

Which instrument is best suited for measuring the dimensions of a shoebox?

A
a triple-beam balance
B
a volumetric flask
C
a ruler
D
a caliper
7

Which describes the correct procedure when converting a number from scientific notation to standard notation?

A
If the power of 10 is positive, move the decimal point to the left.
B
If the power of 10 is positive, move the decimal point to the right.
C
If the number being converted is greater than 10, move the decimal point to the left.
D
If the number being converted is greater than 10, move the decimal point to the right.
8

A company that manufactures cookware has conducted numerous trials to see which metal needs the least amount of energy (measured in Joules, J) to be raised to high temperatures, and records the averages in a table. Which claim will this company most likely make?

Question illustration
A
Aluminum pans are the most energy-efficient cookware.
B
Copper pans are the most energy-efficient cookware, but they cost the most.
C
Iron pans require less energy to heat up than copper frying pans, but they cost less.
D
Copper pans require the most energy to heat up.
9

Which practice poses the greatest safety concern?

A
talking to others in the lab
B
accumulating clutter on the lab bench
C
performing an experiment when sitting down
D
reading the temperature of a water bath
10

Which term best describes the important pieces of information that scientists gather and record during an experiment?

A
conclusions
B
data
C
research
D
supplies
11

Vincent graduated from college with a degree in horticulture and now owns a local plant nursery. He maintains a blog titled, "How to Live a Happy Life,” and writes that people can lead happier lives by varying the routes they usually take home from work.

A
This claim is scientific because it is based on Vincent’s personal experience.
B
This claim is scientific because other people have taken his advice and are now happier.
C
This claim may not be accurate because the blog is produced by someone who is not an expert in the field of human psychology.
D
This claim may not be accurate because most people follow the same route home.
12

In an investigation that uses the scientific method, which step immediately follows asking a question?

A
presenting the results
B
making observations
C
creating a hypothesis
D
designing an experiment
13

Which tool can be used to measure the volume of liquid?

A
an electronic balance
B
a meniscus
C
a caliper
D
a beaker
14

Which feature of a hypothesis leads to a new experiment?

A
a basis on research
B
a dependency on prior knowledge
C
a possible explanation
D
an ability to be tested
15

What information in the MSDS would be most important to know at the end of an experiment?

A
the boiling point
B
the flammability
C
the disposal procedure
D
the reactivity

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