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Science 2nd Quarter Revision- Gr.7

Total questions: 112

Worksheet time: 4hrs 44mins

Name
Class
Date
1.

A material whose particle composition allows heat and electricity to pass through it easily are described as having a high ____.

a)

conductivity

b)

hardness

c)

weight

d)

hardness

2.

You can separate the particles that make up sugar from the particles that make up sand because sugar are ____ and sand are not.

a)

malleable

b)

ductile

c)

soluble in water

d)

acidic

3.

Substances are either elements or mixtures

a)

True

b)

False

4.

Which properties describe elements that are nonmetal gases? Select all that apply.

a)

composed of an extended structure

b)

composed of individual atoms or diatomic molecules

c)

high melting point

d)

low melting point

5.

Which of the following would be modeled by small particles made up of atoms of two kinds of elements?

a)

Gold

b)

Oxygen

c)

Neon

d)

Water

6.

Which is a property of metals as a result of their extended structures of atoms?

a)

are poor conductors of electricity

b)

dissolve in water

c)

have low melting points

d)

can be hammered into sheets

7.

A substance has an extended structure composed of two different elements. The elements are a metal and a nonmetal. Which property would this substance most likely have?

a)

can be hammered into sheets

b)

has a high melting point

c)

does not dissolve in water

d)

is a gas at room temperature

8.

Why does oil not dissolve in water?

a)

Oil is an extended structure, and water is made of polar molecules.

b)

Oil is an extended structure, and water is made of nonpolar molecules.

c)

Oil is made of nonpolar molecules, and water is made of polar molecules.

d)

Oil is made of polar molecules, and water is made of nonpolar molecules.

9.

Because they have an extended structure, elements that are __________ tend to be in the __________________ state at room temperature.

(a)  

10.

Omar observes a white crystal that is cube shaped under a microscope.

Based on this observation, Omar thinks the crystal could be sodium chloride, or table salt. Because the crystal has an extended structure, he knows that sodium chloride is not a molecule. Omar uses gray and green spheres, representing the atoms in sodium chloride, to make a model of the crystal’s most likely structure, as shown.

a. Provide two reasons why the model accurately represents sodium chloride. Support your reasons with evidence from the model.

4 lines
11.

The amount of force that is exerted on a balloon by the gas inside the balloon is _____.

a)

temperature

b)

pressure

c)

volume

d)

heat

12.

As long as the temperature does not change, as the volume _____ the pressure _____.

a)

increases, increases

b)

increases, decreases

c)

decreases, decreases

d)

decreases, stays the same

13.

As the space in a container gets smaller, the _____ decreases.

a)

temperature

b)

volume

c)

pressure

d)

heat

14.

Water can undergo a change of state from liquid to (a)   by decreasing the air pressure on its surface.

15.

When a liquid freezes, its particles get ____. This could result from the pressure ____.

a)

farther apart; decreasing

b)

closer together; decreasing

c)

farther apart; increasing

d)

closer together; increasing

16.

How would the pressure of the gas in an air tank change if more gas particles are added?

4 lines
17.

How are pressure and volume related at a constant temperature?

4 lines
18.

Changes in temperature, pressure, and volume affect the behavior of gases less than they affect solids and liquids. _______________

a)

True

b)

False

19.

The measurement of force per unit area is called (a)  

20.

Shape is a chemical property. _______________

a)

True

b)

False

21.

Density is an example of a ____.

a)

chemical change

b)

physical change

c)

chemical property

d)

physical property

22.

Mass is a(n) ______________ property.

a)

physical

b)

chemical

c)

natural

d)

electrical

23.

Color and size are (a)   properties of matter.

24.

What is density and how it can be measured?

4 lines
25.

You cannot classify matter based on chemical properties.

a)

True

b)

False

26.

The state of matter is an example of a physical property.

True false question.

a)

True

b)

False

27.

Malleability is a physical property.

a)

True

b)

False

28.

Mass is the amount of matter in an object while (a)   is the gravitational pull on the mass of an object.

29.

Which formula listed below correctly finds density?

a)

D = m/V

b)

D = V/m

c)

D = g/V3

d)

g3/V

30.
The amount of matter in an object is a measure of the object's ________________.
a)
volume
b)
density
c)
mass
d)
solubility
31.
Which of the following units provides the best measure for the amount of space that matter occupies?
a)
mL
b)
grams
c)
cm3
d)
Both mL and cm3
32.
What is the volume of the rock? The water level is displaced from 20 mL to 23 mL with the rock.
a)
3 mL
b)
23 mL
c)
20 mL
d)
43 mL
33.
What would be the best way to measure the volume of a small rock?
a)
L x W x H with a ruler
b)
Put on triple beam balance
c)
Mass ÷ Volume
d)
Displacement method using graduated cylinder
34.
Which of the following is not a characteristic property of matter?
a)
Density
b)
Mass
c)
Phase/State
d)
Solubility
35.
If you had a sealed bottle of water, how would the mass of the water bottle change after a 5 day period?
a)
Mass would increase. 
b)
Mass would stay the same. 
c)
Mass would decrease. 
d)
None of the above.
36.
What is the density of water?
a)
1 mL
b)
1 gram
c)
1 g/cm3
d)
All of the above
37.
True or False: 1 mL of water has a mass of 1 gram.
a)
True
b)
False
38.
Which statement is true?
a)
Oil is the most dense substance.
b)
Corn syrup is less dense than water.
c)
Oil is less dense than water.
d)
Oil and corn syrup have the same density but different masses.
39.
An object has a density of 3 g/cm3. When submerged in water, the object will ___________.
a)
float
b)
sink
c)
float halfway in the water
d)
float then sink
40.
What is the most dense metal?
a)
Aluminum 
2.7 g/cm3
b)
Steel
7.14 g/cm3
c)
Nylon
1.2 g/cm3
d)
Copper 
8.14 g/cm3
41.
The boiling point of water is ______________.
a)
0° C
b)
50° C
c)
200° C
d)
100° C
42.
The volume of water in a beaker was 215 mL. After 5 days, the volume of the water was 200 mL. What best explains the change in volume?
a)
Some of the water absorbed the air. 
b)
Some of the water evaporated and escaped into the air as water vapor.
c)
Some of the water disappeared.
d)
Some of the water was released due to condensation.
43.
The amount of space something takes up.
a)
matter
b)
mass
c)
volume
d)
element
44.
The smallest unit into which an element can be divided and still retain all the properties of that element.
a)
atomic theory
b)
compound
c)
element
d)
atom
45.
Matter that is made of only one kind of atom.
a)
compound
b)
volume
c)
element
d)
atom
46.
A substance made of atoms of two or more elements that have combined chemically.
a)
compound
b)
matter
c)
volume
d)
chemical change
47.
volume
a)
the amount of space taken up by an object
b)
how loud you turn the radio up
c)
how heavy something is
d)
the three states of matter
48.
Density is...
a)
the amount of mass in an object
b)
the amount of space an object takes up
c)
the amount of mass in a given space
d)
the weight of an object
49.
If an object has a density of .6 g/mL and you put it into water, will it sink or float?  
a)
sink
b)
float
50.
Which liquid is the most dense?  
a)
oil
b)
water
c)
syrup
d)
plastic bottle
51.
Which liquid is the least dense?
a)
oil
b)
water
c)
syrup 
d)
plastic bottle
52.
Which is an example of a physical property?
a)
ability to react with acid
b)
 color
c)
flammability
d)
ability to react with oxygen
53.
Physical properties are
a)
properties that can be observed without changing the identity of the substance
b)
properties that describe how a substance changes into a completely different substance
c)
properties that we can only observe with our eyes
d)
properties that we need special tools to observe
54.
Which is an example of a physical property?
a)
rusting
b)
boiling point
c)
combustion
d)
reactivity with water
55.
The amount of force pushing on an area is the definition of....
a)
Fluid
b)
Viscosity
c)
Barometer
d)
Pressure
56.

How would the pressure of the gas in an air tank change if more gas particles are added?

a)

As particles are added the pressure inside the tank would decrease.

b)

As particles are added the pressure inside the tank would increase.

c)

As particles are added the pressure on the outside of the tank would increase.

57.

How are pressure and volume related?

a)

As the pressure decreases, volume decreases.

b)

As the pressure increases, the volume increases.

c)

As the pressure increases, the volume decreases.

d)

As the pressure decreases, the volume stays the same.

58.

As pressure increases the boiling point of water increases.

a)

True

b)

False

59.

Pressure is the amount of ___________ per unit area.

a)

force

b)

atoms

c)

heat

d)

volume

60.

What causes air pressure?

a)

force of collisions from air particles

b)

air particles increasing in size

c)

increasing the mass of each air particle

d)

air particles changing state

61.

What relationship does this demonstrate?

a)

as volume decreases, pressure increases

b)

as volume increases, pressure decreases

c)

as volume increases, pressure increases

d)

as volume decreases, pressure decreases

62.

Why does adding more particles increase pressure?

a)

more collisions on the surface of the tire

b)

more mass inside the tire

c)

more space between the particles

d)

particles collide and combine into larger particles

63.

What concept on pressure does the image show?

a)

adding particles increases pressure

b)

more mass increases pressure

c)

larger particles increases pressure

d)

more space between particles increases pressure

64.

How does heat affect pressure?

a)

increasing heat causes an increase in pressure

b)

increasing heat causes a decrease in pressure

c)

increasing heat causes particles to explode

d)

increasing heat causes particles to catch on fire

65.

Why does changing temperature cause a change in pressure?

a)

particles collide harder the faster they move

b)

particles burn the sides of the container

c)

particles enlarge the hotter they become

d)

particles get too hot and turn into pure energy

66.

What type of relationship is there between pressure and temperature?

a)

inversely proportional

b)

proportional

c)

no relationship

67.

What type of relationship is there between pressure and number of particles?

a)

inversely proportional

b)

proportional

c)

no relationship

68.

What type of relationship is there between pressure and volume?

a)

inversely proportional

b)

proportional

c)

no relationship

69.

Why does pressure increase from A to B?

a)

less space means the particles collide more frequently

b)

there are more particles causing more collisions

c)

the particles are moving faster and hitting the sides more often

d)

the particles are getting squished and push back like a bouncy ball

70.
If the different colors represent different elements, what is this structure?
a)
element
b)
allotrope
c)
compound
d)
space alien
71.
This is an example of a 
a)
box
b)
polymer
c)
atom
d)
crystal
72.
In this picture the red represents oxygen atoms and the green represents carbon atoms.  What does this image show?
a)
compounds that form bonds to one another
b)
molecules of water
c)
compounds that do not bond to each other
d)
ants lost is space
73.
Hydrogen, Helium, Oxygen, Carbon, etc. are all examples of
a)
molecules
b)
elements
c)
color schemes
d)
compounds
74.
This is a model of a caffeine molecule.  Is it also a compound? 
a)
Yes
b)
No
c)
Maybe so
75.
This represents an
a)
the element, Hydrogen
b)
a molecule
c)
a compound
d)
a solar eclipse
76.
All of these molecules are 
a)
diatomic molecules
b)
diatomic compounds
c)
dietetic polymers
d)
allotropes of lithium
77.
True or False:  Atoms can bond to form molecules.
a)
True
b)
False
78.
True or False: Some molecules will not bond to other molecules.
a)
True
b)
False
79.

sugar and water are polar molecules

a)

True

b)

False

80.

positive particles attracts each other

a)

True

b)

False

81.

water molecule is made of

a)

2 oxygen atoms and 2 hydrogen atom

b)

2 hydrogen atoms and one oxygen atom

c)

2 Nitrogen atoms and one oxygen atom

d)

1 hydrogen atom and 1 oxygen atom

82.

glucose molecule have 24 atoms

a)

True

b)

False

83.

What is an atom?

a)

the outer shell of electrons

b)

the smallest part of an element with that element's properties

c)

a positively charged particle with negative parts

d)

the center of a nucleus

84.

Have your periodic table ready for the next question. Meanwhile....what is the periodic table?

a)

an image showing all the electron shells of an atom

b)

a chart that shows all the repeating events in the universe

c)

a way to create static electricity

d)

an organized way to list all elements and their properties

85.

A student creates a ball-and-stick model of a substance. Which of the following BEST describes the model?

a)

one molecule with 4 atoms

b)

one atom with 4 molecules

c)

four molecules representing four atoms

d)

four elements representing one atom

86.
The ability of a metal to allow heat or electricity to pass through it.
a)
conductivity
b)
insulator
c)
mass
d)
density
87.

Define the term soluble.

a)

Can dissolve in water

b)

Cannot dissolve in water

c)

Partially dissolves in water

88.
Is sugar (C12H22O11) an element or a compound?
a)
Element
b)
Compound
89.
A compound consists of two or more elements bound together.
a)
True
b)
False
90.
Is Iron (Fe) an element or a compound?
a)
Element
b)
Compound
91.
Which of the following represents an element?
a)
H2O
b)
H2
c)
NaCl
d)
CaCO3
92.
Which of these grouping of elements could have the characteristic of brittle?
a)
Metal
b)
Nonmetal
93.
A pure substance that cannot be broken down into anything simpler is a/an-
a)
atom
b)
element
c)
cell
d)
compound
94.

Ionic bonding is between a

a)

nonmetal ( - ) and nonmetal ( - )

b)

metal ( + ) and nonmetal ( - )

c)

metal ( + ) and metal ( + )

d)

Depends on the situation

95.

Covalent bonding is between a

a)

nonmetal and nonmetal

b)

metal and nonmetal

c)

metal and metal

d)

It depends on the situation

96.

What category of element usually forms a positive ion?

a)

Metals

b)

Nonmetals

c)

metalloids

d)

Noble gases

97.

Which category of elements usually form negative ions?

a)

metals

b)

nonmetals

c)

metalloids

d)

noble gases

98.
Which of these is a property of metals?
a)
It's malleable
b)
It can't conduct electricity
c)
They are used in food
d)
It's very brittle
99.
Brittle
a)
Metal
b)
Nonmetal
100.
Good conductor of heat
a)
Metal
b)
Nonmetal
101.
All of the following would classify an element as a metal except?
a)
Dull
b)
Luster
c)
Malleable
d)
Hard
102.
Iron is a good conductor, malleable and magnetic. What type of element is Iron? 
a)
Metal
b)
Nonmetal
c)
Metalloid
d)
Pretty
103.
Which of the following is a property of a non-metal?
a)
Conducts electricity and heats well
b)
Can be hammered into thin sheets
c)
Is brittle and breaks easily
d)
Has a shiny, metallic luster
104.
The word “luster” refers to which property of matter?
a)
The ability to conduct electrical or thermal energy
b)
Capable of being drawn out into thin wires
c)
The way a surface appears when it reflects light
d)
Suitable for being shaped by beating or rolling
105.
John was observing the physical properties of elements in order to classify them as either a metal, nonmetal, or metalloid. The first element was dull, brittle, and did not conduct heat. What would its classification be? 
a)
metal 
b)
nonmetal 
c)
metalloid
106.

Which of these is a property of metals because of their extended structure?

a)

It's malleable

b)

It can't conduct electricity

c)

They are used in food

d)

It's very brittle

107.
Which of the following is NOT a characteristic of most metals?
a)
Brittle
b)
Good conductor
c)
Ductile
d)
Malleable
108.

Because of their extended structures (repeating atomic pattern) at room temperature metals are ____________.

a)

plasma

b)

gases

c)

liquid

d)

solid

109.

Water and oil are placed in the same vessel and stirred. The reason that oil and water will not mix is because -

a)

water is nonpolar and oil is polar

b)

both water and oil are nonpolar

c)

both water and oil are polar

d)

water is polar and oil is nonpolar

110.

What is the example in the image?

a)

The electrons in an atom

b)

A diatomic structure

c)

An extended structure (crystal lattice)

d)

A water molecule

111.
Is the following picture a simple compound or extended structure?
a)
Simple Compound 
b)
Extended Structure
c)
Neither
112.
Which of the following explains this picture?
a)
Atoms of the same type bonding to form an extended structure
b)
Atoms of different types bonding to form a structure
c)
Molecules of different types bonding to form a structure
d)
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