AnswersWA-Physical Science BAcceleration

Acceleration — Cumulative exam Answers

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1
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Which element is a halogen?

A
chlorine (Cl)
B
oxygen (O)
C
carbon (C)
D
radon (Rn)
2
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The picture shows a student working in the lab.

Question illustration
A
one
B
two
C
three
D
four
3

Two students are given two different size blocks of the same substance and are instructed to determine the properties of the substance. Which statement describes a property that will be the same for both students?

A
length because it is an extensive property
B
mass because it is an extensive property
C
boiling point because it is an intensive property
D
volume because it is an intensive property
4

Which statement best describes a relationship amongst hypotheses, theories, and laws?

A
A hypothesis is used to explain laws and theories.
B
A law is used to explain a hypothesis and theories.
C
A hypothesis combines several theories.
D
A theory combines several hypotheses.
5

When a hammer strikes a compound formed by covalent bonds, what will most likely happen to the compound?

A
It will break into many pieces.
B
It will reform into a new shape.
C
It will spread out and then return to its original shape.
D
It will stay solid and resist the force of the hammer.
6

Which statement best describes the explanatory powers of hypotheses and theories?

A
A hypothesis does not provide an explanation but instead only predicts what may happen.
B
A theory does not provide an explanation but instead only predicts what may happen.
C
The explanation given by a theory is well tested and supported by many observations and hypotheses.
D
The explanation given by a hypothesis is well tested and supported by many observations and theories.
7

Read the passage.In Federal Drug Administration clinical trials, people who added a particular drug to diet and exercise were able to lose weight, as well as lower their blood pressure. This drug was evaluated in two clinical studies involving overweight adults with high blood pressure. The results of the trials showed that 48 percent of people taking this drug lost some of their body weight. The other group in this trial consisted of people who were not taking this medicine, and only 23 percent of them lost some weight.

A
Exercise and diet help people lose more weight than with the aid of this drug.
B
This drug helps people lose more weight than diet and exercise alone.
C
Overweight adults have always had high blood pressure.
D
This drug won’t help people lower their blood pressure if they already exercise.
8

Which properties do metalloids share with metals?

A
Both are shiny and are brittle.
B
Both are very conductive and are dull.
C
Both are brittle and are gases at room temperature.
D
Both are shiny and are solid at room temperature.
9

A sample of a solid nonmetal is compared to a sample of a solid metal. Both samples have the same volume. What is the most likely difference between the two samples?

A
The nonmetal has more mass.
B
The nonmetal takes up more space.
C
The metal has more mass.
D
The metal takes up more space.
10

Read the thermometer.

Question illustration
A
–8°
B
0°
C
25°
D
32°
11

Lucy is supposed to write down the lengths of 10 earthworms found near the playground at her school. She measures the earthworms’ lengths in millimeters, but she accidentally labels her data in centimeters.Which best describes this error in data collection?

A
The data are inadequate.
B
The data are false.
C
The data are recorded incorrectly.
D
The data cannot be reproduced.
12

Assuming the bull’s eye is the accepted value, which diagram shows results that are accurate and precise?

A
Option
Option A
B
Option
Option B
C
Option
Option C
D
Option
Option D
13

This chart lists four elements from the periodic table.Atoms from which two elements would form ionic bonds?

Question illustration
A
calcium and gold
B
gold and argon
C
argon and iodine
D
iodine and calcium
14

Covalent bonds tend to make atoms more stable by helping them

A
fill up their innermost electron shell.
B
fill up their outermost electron shell.
C
empty out their innermost electron shell.
D
empty out their outermost electron shell.
15

A teacher wants to perform a classroom demonstration that illustrates both chemical and physical changes. Which would be the best demonstration that she could use?

A
bending a piece of aluminum
B
breaking a matchstick
C
dissolving sugar in water
D
burning a candle
16

Hsaio manages the finances for her company and has a particularly large amount of money budgeted for the purchase of calcium chloride, or CaCl2. Which type of company does Hsaio most likely own?

A
a snow-plowing service
B
a cosmetics factory
C
a pottery art studio
D
a catering business
17

Miles mixed two unlabeled solutions together. This caused a bad reaction, and a noxious gas was emitted. Which describes what Miles should do?

A
He should use a fire blanket to cover his solutions.
B
He should report the accident and leave the area.
C
He should neutralize the reaction by adding water.
D
He should pour the solution down the sink to stop the gas.
18

What is 5.27 × 10–4 written in standard form?

A
0.00527
B
0.000527
C
5,270
D
52,700
19

A scientist wants to perform a controlled experiment to test the effect of rust on chemically treated iron. Which action would be most important to perform in a controlled experiment?

A
Design an experiment that is based on previously published results.
B
Expose the treated iron to the corrosive effects of the air.
C
Test a large piece of treated iron and a small piece of untreated iron.
D
Test a piece of treated iron and a piece of untreated iron under the same conditions.
20

Look at the graph below.

Question illustration
A
calcium and iron
B
calcium and sodium
C
potassium and magnesium
D
potassium and sodium

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