Quiz about Q3- CompSci2 Study Guide

Question 1

Which of the above figures best represents the depiction of an element?

Accepted Answer

figure X

Answer

figure W

Answer

figure Y

Answer

figure Z

Question 2

Which of the figures above best represents the depiction of a compound?

Accepted Answer

figure W

Answer

figure X

Answer

figure Y

Answer

figure Z

Question 3

When magnesium (Mg) metal is burned in the presence of oxygen gas (O₂), magnesium oxide (MgO) is produced. The properties of magnesium oxide are different from the individual properties of magnesium and oxygen because magnesium oxide is

Accepted Answer

a compound

Answer

a solution

Answer

a mixture

Answer

an element

Question 4

What is another name for a solution?

Accepted Answer

homogeneous mixture

Answer

heterogeneous mixture

Answer

substance

Answer

compound

Question 5

A substance in which two or more elements are chemically combined is called a(n)

Accepted Answer

compound

Answer

substance

Answer

element

Answer

mixture

Question 6

If a substance consists of only one kind of atom, it is a(an)

Accepted Answer

Element

Answer

Mixture

Answer

Solution

Answer

Compound

Question 7

Cereals are made of many different ingredients. Which term describes the cereal?

Accepted Answer

Mixture

Answer

Compound

Answer

Element

Answer

Solution

Question 8

A(n) ________________ is something you can find on the periodic table.

Accepted Answer

Element

Answer

Compound

Answer

Mixture

Answer

Solution

Question 9

Which of the following choices sequences the parts of matter from smallest to largest correctly?

Accepted Answer

atom -> element -> compound

Answer

atom -> compound -> element

Answer

element -> atom -> compound

Answer

element -> compound -> atom

Question 10

In which of the following can you easily see the individual parts?

Accepted Answer

Heterogeneous Mixture

Answer

Homogeneous Compound

Answer

Homogeneous Mixture

Answer

Heterogeneous Compound

Question 11

What is the measuring unit for mass?

Accepted Answer

grams

Answer

centimeter

Answer

millimeter

Answer

pounds

Question 12

Which box has a higher density?

Accepted Answer

A

Answer

B

Answer

They are the same

Question 13

Put the liquids from the image in order from most dense to least dense.

Accepted Answer

4, 3, 2, 1

Answer

1, 2, 3, 4

Answer

3, 4, 2, 1,

Answer

4, 3, 1, 2

Question 14

Frank has a paper clip. It has a mass of 9g and a volume of 3cm³. What is its density?

Accepted Answer

3 g/cm3

Answer

1/3 g/cm3

Answer

27 g/cm3

Answer

39 g/cm3

Question 15

The amount of water displaced is the same as the volume of the object. What is the VOLUME of the object in the image?

Accepted Answer

25 mL

Answer

40 mL

Answer

65 mL

Answer

20 mL

Question 16

What is the volume of this prism?

Accepted Answer

18 cubic cm

Answer

6 cubic cm

Answer

9 cubic cm

Question 17

Which answer ranks the objects in the image in order from MOST DENSE to LEAST DENSE?

Accepted Answer

B, A, C, D

Answer

D, C, A, B

Answer

A, B, C, D

Answer

D, C, B, A

Question 18

Which of the items listed on the Common Substances table would have the LEAST MASS in a 10 cm³ sample?

Accepted Answer

Aluminum

Answer

Copper

Answer

Gold

Question 19

Using the information in the image, which would have a greater MASS, 10 cm³ of silver or 10 cm³ of gold?

Accepted Answer

Gold

Answer

Silver

Question 20

If you cut a wooden block in half, each half would have

Accepted Answer

the same density as the original piece

Answer

half the density of the original piece

Answer

twice the density of the original piece

Answer

no density at all

Question 21

Sarah is completing a lab in which she is required to identify an unknown substance. She records several observations and measurements of the substance. Which of the following properties will be most helpful to Sarah in making a correct identification?

Accepted Answer

density

Answer

volume

Answer

mass

Answer

weight

Question 22

When a helium balloon rises in the air, it expands. If the mass of the balloon remains the same but the volume of the balloon doubles, which claim describes what happens to the density of the helium inside it?

Accepted Answer

the density decreases by half

Answer

the density triples

Answer

the density doubles

Answer

the density stays the same

Question 23

A metal coin has certain properties that can be measured. Which property of a coin is different on the moon than it is on Earth?

Accepted Answer

weight

Answer

density

Answer

mass

Answer

volume

Question 24

The element silver has both physical and chemical properties, some of which do not change when the size of the sample changes. Which of these choices is a physical property that does not change when the size of the sample changes?

Accepted Answer

density

Answer

mass

Answer

volume

Answer

weight

Question 25

If Troy has a 4 cm³ cube of each of these metals, which cube will have the greatest mass?

Accepted Answer

gold

Answer

brass

Answer

iron

Answer

lead

Question 26

A tiny piece of sand is very light but sinks in water. Why?

Accepted Answer

It is more dense than the water.

Answer

It is less dense than the water.

Answer

It has a high solubility.

Answer

It has a low solubility.

Question 27

Which one changes when an astronaut goes to the moon, her weight or her mass? Why?

Accepted Answer

weight, because it changes with gravity

Answer

mass, because it changes with gravity

Answer

mass because there is more matter

Answer

weight because there is less matter

Question 28

The two objects shown are the same size. However, one object is made of wood, and the other object is made of plastic. Which of the following properties of the objects will be the same?

Accepted Answer

volume

Answer

mass

Answer

texture

Answer

weight

Question 29

If two objects balance like the ones shown below, what must be true?

Accepted Answer

Both objects have the same mass.

Answer

Object A has more mass than object B.

Answer

Object A has more volume than object B.

Answer

Both objects have the same volume.

Question 30

George's science teacher has a mixture of table salt and iron filings. Which of the following would be the best way to separate the salt and the iron filings?

Accepted Answer

use a magnet to pull the iron filings from the salt

Answer

add food coloring to the mixture to make the salt change color

Answer

pour them into a beaker of water and see if the iron filings float

Answer

heat up the mixture to see if the salt or the iron filings will burn away

Question 31

Abdul uses sugar cubes to sweeten his tea. He wonders whether stirring his tea will make the sugar cube dissolve faster or slower. If Abdul stirs his tea, what effect does it have on the rate at which the sugar cube dissolves?

Accepted Answer

The rate that the sugar cube dissolves will speed up.

Answer

The rate that the sugar cube dissolves will slow down.

Answer

The rate that the sugar cube dissolves will remain the same.

Answer

The rate that the sugar cube dissolves will slow down and then stop.

Question 32

Review the illustration of an atom. How many electrons are found in this atom?

Accepted Answer

7

Answer

5

Answer

2

Answer

6

Question 33

Review the illustration below of an atom. Which two subatomic particles make up the nucleus of an atom?

Accepted Answer

neutron and proton

Answer

proton and electron

Answer

electron and neutron

Answer

ion and proton

Question 34

The periodic table of the elements organizes elements according to their properties. A section of the periodic table is shown.

Which set of elements below is the most similar in chemical behavior?

Accepted Answer

Be, Ca, Ra

Answer

H, Be, Sc

Answer

Fr, Ra, Rf

Answer

Ti, V, Cr

Question 35

What do carbon, hydrogen, and oxygen atoms have in common?

Accepted Answer

electrons located outside of the nucleus

Answer

the same number of protons

Answer

he same number of electrons

Answer

neutrons located outside of the nucleus

Question 36

The periodic table of the elements organizes elements according to their properties. A section of the periodic table is shown.

Which set of elements below is the most similar in chemical behavior?

Accepted Answer

Be, Ca, Ra

Answer

H, Be, Sc

Answer

Fr, Ra, Rf

Answer

Ti, V, Cr

Question 37

There are more than 100 known elements. Which of the following best describes these elements?

Accepted Answer

Most of the elements are metals.

Answer

Most of the elements are nonmetals.

Answer

Most of the elements are metalloids.

Answer

Most of the elements are noble gases.

Question 38

The information on the periodic table is organized into boxes, which are placed in rows and stacked in columns. Which of the following does each box represent?

Accepted Answer

Element

Answer

Compound

Answer

Group

Answer

Period

Question 39

What do elements in the same group on the periodic table have in common?

Accepted Answer

They have similar chemical properties

Answer

They have similar chemical symbols

Answer

They have the same atomic number

Answer

They have the same average atomic mass

Question 40

Which of the following does NOT contain hydrogen?

Accepted Answer

Sodium Chloride (NaCl)

Answer

Water (H₂O)

Answer

Hydrogen Peroxide (H₂O₂)

Answer

Ammonia (NH₄)

Question 41

Which one is NOT found on the periodic table?

Accepted Answer

Water

Answer

Zirconium

Answer

Chlorine

Answer

Hydrogen

Question 42

Explain the difference between periods and groups.

Accepted Answer

Periods go across and groups go down.

Answer

Periods go down and groups go across.

Answer

Periods show similar characteristics and groups show differences.

Answer

Periods show elements and groups show compounds.

Q3- CompSci2 Study Guide

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