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Form 2 Science

Total questions: 100

Worksheet time: 1hrs 9mins

Name
Class
Date
1.
Disease-causing microorganism, such as a bacterium or fungus.
a)
antigen
b)
prion
c)
pathogen
d)
allergen
2.
a tiny, non-living particle that invades and then multiplies inside a living cell is called
a)
bacteria
b)
a virus
c)
a fungi
d)
ha protist
3.
a single-celled organism that lacks a nucleus is called
a)
a bacteriophage
b)
a virus
c)
a protist
d)
bacteria
4.

The blood cells that fight pathogens.

a)

Leukocytes

b)

Red blood cells

c)

Plasma

d)

Hemoglobin

5.
A protein made by white blood cells to fight a specific pathogen.
a)
Antibody
b)
Antivirus
c)
Allegra
d)
Allotment
6.

Antibodies are only effective against a specific pathogen because:

a)

The shape of the antibody is the same as the shape of the antigen on the pathogen

b)

The shape of the antibody is complementary to the shape of the antigen on the pathogen

c)

Antibodies cause a primary immune response

d)

Antibodies cause a secondary immune response

7.

A person produces antibodies to influenza after vaccination. This is an example of:

a)

Natural (passive) immunity

b)

Natural (active) immunity

c)

Artificial (passive) immunity

d)

Artificial (active) immunity

8.

Which of the following is an effective method of preventing infection by Malaria?

a)

Use pesticides to kill the mosquito (vector)

b)

Quarantine the mosquitos that carry the parasite

c)

Provide condoms to prevent transmission of parasite during sex

d)

Drink plenty of water

9.

A host is:

a)

An organism that harbors a pathogen

b)

Grant Denyer on Family Feud

c)

An animal that transmits a pathogen

d)

A microorganism that has been transmitted

10.

What is an infectious disease?

a)

A disease that can be spread from person to person

b)

A disease that cannot be spread from person to person

11.
Heredity, and environment contribute to which type of diseases.....
a)
infectious
b)
flu
c)
contagious
d)
noninfectious
12.
What is the job of the immune system?
a)
To protect your body from drugs and medicine
b)
To protect your body from air and water
c)
To protect your body from pathogens
d)
To protect your body from itself
13.
What is one of the ways that antibiotics work? 
a)
They can stop bacteria from reproducing
b)
They can stop viruses from reproducing
c)
They stop toxins from poisoning the tissues of hosts
d)
They engulf the pathogens
14.
What sort of pathogen causes influenza (flu)?
a)
A bacterium
b)
A virus
c)
A fungus
d)
A protist
15.
What is one MAJOR organ of the Immune System?
a)
Spinal Cord
b)
Brain
c)
Skin
d)
Heart
16.
What is one way a pathogen can enter the body?
a)
Nose
b)
Mouth
c)
Broken Skin
d)
All of the Aove
17.

Which pathogen is non-living?

a)

Virus

b)

Bacteria

c)

Fungi

d)

Parasite/Protist

e)

They are all alive

18.

Which pathogen needs a host cell to reproduce?

a)

virus

b)

bacteria

c)

fungus

d)

parasite/protist

19.

Malaria is caused by:

a)

parasite

b)

fungi

c)

virus

d)

bacteria

20.
What is a protective protein produced by the immune system?
a)
Antibody
b)
Antibiotic
c)
Antigen
d)
Antimicrobial
21.

A secondary immune response will be faster when...

a)

The individual has encountered the pathogen already

b)

The individual's macrophages are on high alert

c)

The individual has encountered the pathogen and has memory B cells circulating

d)

Antibodies are produced by T cells

22.
Which is an example of passive immunity?
a)
people being vaccinated against disease
b)
people taking vitamins to boost their immune response
c)
people receiving antibodies from their mothers before birth
d)
people producing antibodies against organisms that cause diseases they have had previosuly
23.

Immunity that occurs when a person's own immune system produces antibodies in response to the presence of a pathogen when a person gets sick

a)

Natural Passive Immunity

b)

Natural Active Immunity

c)

Artificial Active Immunity

24.

Immunity in which antibodies are given to a person rather than produced within the person's own body

a)

Artificial Passive Immunity

b)

Natural Passive Immunity

c)

Artificial Active Immunity

25.

Which immunity is present at birth and passed from the mother to the baby through milk and the placenta?

a)

Artificial Active Immunity

b)

Natural Active immunity

c)

Natural passive immunity

d)

Artificial passive immunity

26.

When thermal energy is increased in a solid, what change in state is happening?

a)

Melting

b)

Evaporation

c)

Freezing

d)

Condensation

27.

When thermal energy is decreased in a liquid, what change in state is happening?

a)

Melting

b)

Freezing

c)

Condensation

d)

Evaporation

28.

When thermal energy is increased in a liquid, what change in state is happening?

a)

Melting

b)

Evaporation

c)

Condensation

d)

Freezing

29.

When thermal energy is decreased in a gas, what change in state is happening?

a)

Melting

b)

Freezing

c)

Evaporation

d)

Condensation

30.

When thermal energy is increased in a liquid and evaporation occurs, what state of matter does the liquid change into?

a)

Solid

b)

Gas

31.

When thermal energy is decreased in a liquid and freezing occurs, what state of matter does the liquid change into?

a)

Gas

b)

Solid

32.

What two changes of state occur when thermal energy is added to/increased in a substance?

a)

Melting

b)

Freezing

c)

Condensation

d)

Evaporation

33.

What two changes of state occur when thermal energy is taken away/decreased in a substance?

a)

Freezing

b)

Condensation

c)

Melting

d)

Evaporation

34.

Water melts at _______ ∘\circ  C and boils at ________ ∘\circ  C.

a)

0 and 4

b)

-1 and 98

c)

4 and 100

d)

0 and 100

35.

Why container C will evaporate the fastest?

a)

The largest surface area

b)

The highest humidity

c)

The highest temperature

d)

The highest air movement

36.

When the surrounding temperature is high, the rate of evaporation _____________________

a)

increase

b)

decrease

c)

no change

37.

Which one these factors do not affect the rate of evaporation of water?

a)

Temperature

b)

Time of the day

c)

Presence of wind

d)

Exposed surface area

38.

Stirring the solution increases the rate of dissolution (rate of dissolving).

a)

True

b)

False

39.

The smaller the particle size the faster the rate of dissolution (rate of dissolving).

a)

True

b)

False

40.
Which of the following statements is true about how using smaller salt crystals would affect the rate of making a salt solution in water?
a)
Smaller crystals increase the surface area and slow down dissolving.
b)
Smaller crystals decrease the surface area and speed up dissolving.
c)
Smaller crystals increase the surface area and speed up dissolving.
d)
Smaller crystals decrease the surface area and slow down dissolving.
41.

Which will dissolve faster? Crushed table salt or a cube of table salt. Assume they have an equal mass.

a)

crushed table salt

b)

crystal of table salt

42.

What combination would dissolve a solid solute the fastest?

a)

high temperature, no stirring

b)

no heat, no stirring

c)

sugar cube, no heat

d)

high temperature, stirring

43.
Darla put some sugar in a pitcher of iced tea.
 

Why is Darla stirring the iced tea? 
a)
Stirring makes the iced tea colder
b)
Stirring makes the sugar dissolve more quickly
c)
Stirring keeps the sugar from forming into larger pieces
d)
D - The sugar will not dissolve unless she stirs the iced tea
44.
Hana put the same amount of salt into these two beakers of water. She stirred them into the same amount of water.
 
In which beaker does the salt dissolve more quickly? 
a)
Beaker A because the temperature is lower
b)
Beaker B because the temperature is higher
c)
The salt dissolves at the same speed in both beakers
d)
The salt does not dissolve in either beaker. It sinks to the bottom
45.

A homogeneous, noncrystalline substance consisting of large molecules or ultramicroscopic particles of one substance dispersed through a second substance

a)

Solution

b)

Suspension

c)

Colloids

d)

Sedimentation

46.

Substance that dissolves the solute____

a)

solution

b)

solvent

c)

saturation

d)

so

47.
If a spoonful of sugar is mixed in a glass of water, what is the water called? 
a)
solute
b)
solution
c)
solvent
d)
element 
48.
Milk is a 
a)
solution
b)
suspension
c)
colloid
49.
A colloid is a mixture that contains undissolved particles. 
a)
True
b)
False
50.
What type of mixture separates upon standing?
a)
Solution
b)
Alloy
c)
Colloid
d)
Suspension
51.
A mixture whose particles are larger than the size of a molecule but smaller than particles that can be seen with the naked eye is known as a __.
a)
solution
b)
suspension
c)
colloid
d)
solvent
52.
Salt dissolved in water.  
What method would you use to separate this mixture?
a)
sorting by hand
b)
distillation
c)
chromatography
53.
In the distillation apparatus shown, what are the parts labelled A and B?
a)
A = funnel, B = thermometer
b)
A = thermometer, B = funnel
c)
A = Liebig condenser, B = flask
d)
A = Liebig condenser, B = thermometer
54.
The diagram shows the apparatus for separating soil and water. What are the labelled parts?
a)
A = distillate, B = filtrate
b)
A = filtrate, B = residue
c)
A = residue, B = filtrate
d)
A = residue, B = distillate
55.
Which one of the following is the name for separation technique in the picture below
a)
distillation
b)
seiving
c)
evaporation
d)
decanting
56.
Which one of the following would you use to separate sand from iron filings?
a)
a bar magnet
b)
 filter paper
c)
distillation apparatus
d)
chromatography paper
57.
Which technique is shown the diagram below
a)
seiving
b)
filtration
c)
decanting
d)
crystallization
58.
Water and alcohol are easily separated by distillation because of their
a)
different densities
b)
different boiling points
c)
different colours
d)
different melting points
59.
Which of these mixture types would have visible particles that could settle to the bottom of the mixture?
a)
suspension
b)
solution
c)
colloid
d)
sassafrass
60.
Air is a mixture of
a)
liquids
b)
gas
c)
solids
d)
liquids and gases
61.
An example of a homogeneous mixture would be:
a)
salad
b)
perfume
c)
pizza
d)
chex mix
62.
No matter what you do, sand will not dissolve in water, sand is _________ ?
a)
dissolved
b)
soluble
c)
insoluble
d)
aqueous
63.
Select the correct order for the water treatment process.
a)
Sedimentation - Chlorination - Filtration
b)
Sedimentation - Filtration - Chlorination
c)
Filtration - Chlorination - Sedimentation
d)
Filtration - Sedimentation - Chlorination
64.
What does chlorination do to the water?
a)
Removes microorganisms
b)
Cleans the water
c)
Makes the water taste nice
d)
Removes twigs and sediment
65.
What are two things that water treatment plants need to do?
a)
Clean and disinfect the water
b)
Boil and evaporate the water
c)
Remove the animals and plants
d)
Add chemicals and remove pesticides
66.

Water pollution occurs when:

a)

Harmful substances enter a water supply

b)

Industries dispose of waste safely and correctly.

c)

Industries cut costs with waste disposal.

d)

None of the above.

67.

What are the main sources of water pollution?

a)

Plastic, Paper, and Metal

b)

Snails in water

c)

Help, there is a boot with a snake inside of it that somehow in the nearby lake.

d)

Agriculture, Industry, and Community

68.

Which of the following is not a natural cause of water pollution?

a)

Volcanoes

b)

Animal waste

c)

Oil spills

d)

Silt from storms and floods

69.

The pH of pure water

a)

5.6

b)

7.0

c)

8.1

d)

0.0

70.

Acid in our stomach:

a)

Hydrochloric acid

b)

Sulfuric acid

c)

Acetic acid

d)

Carbonic acid

71.

Acid in soft drink:

a)

Hydrochloric acid

b)

Sulfuric acid

c)

Acetic acid

d)

Carbonic acid

72.

Which substance is alkali?

a)

Toothpaste

b)

Vinegar

c)

Lemon juice

d)

Soft drink

73.

The color of litmus in acid:

a)

Red

b)

Blue

c)

Purple

d)

Green

74.

The color of litmus in alkali:

a)

Red

b)

Blue

c)

Purple

d)

Green

75.

The color of universal indicator in pure water:

a)

Red

b)

Blue

c)

Purple

d)

Green

76.

Acids taste .....

a)

sour

b)

bitter

c)

sweet

d)

umami

77.

Rain water is slightly acidic. What is its pH?

a)

1.0

b)

5.6

c)

7.0

d)

8.2

78.

Reaction between acid and alkali producing salt and water:

a)

Combustion

b)

Neutralization

c)

Precipitation

d)

Decomposition

79.

Something that can be used to identify acid/alkali:

a)

Indicator

b)

Oxidator

c)

Reductor

d)

Terminator

80.

The color of universal indicator in hydrochloric acid:

a)

Red

b)

Blue

c)

Purple

d)

Green

81.
a)

a

b)

b

c)

c

d)

d

82.
a)

a

b)

b

c)

c

d)

d

83.
Two like charges
a)
 neutralize each other.
b)
repel each other. 
c)
must be neutrons. 
d)
attract each other.
84.
The charge of an electron is 
a)
positive. 
b)
negative. 
c)
Electrons have no charge
85.
Which of the following is not a good insulator?
a)
Copper
b)
Glass
c)
rubber
d)
wool
86.
What is the name of this device that is used to detect charges?
a)
beaker
b)
electroscope
c)
van de graff generator
d)
chargometer
87.
The picture shows an electrical circuit. This circuit is a series circuit because: 
a)
It has 3 light bulbs.
b)
The same current flows through all three light bulbs.
c)
It uses a single battery.
d)
The electrical current is divided between the three light bulbs.
88.
This is the symbol for a _____?
a)
switch
b)
light 
c)
battery
d)
wires
89.
This is the symbol for a _____?
a)
an AC current source
b)
a DC current source
c)
a battery
d)
a single cell
90.
This is the symbol for a _____?
a)
Lamp
b)
Water wheel
c)
Loudspeaker
d)
Motor
91.
this circuit is .....?
a)
open
b)
parallel
c)
closed
d)
The cutest little circuit evah!
92.
Which best describes a parallel circuit?
a)
Electricity flows along one pathway.
b)
The flow of electricity comes from one source. 
c)
Electricity flows along more than one pathway. 
d)
The flow of electricity comes from more than one source. 
93.
What is one problem with using a series circuit? 
a)
It has a lot of series. 
b)
If one goes down, they all go down! 
c)
It doesn't work properly.
d)
There are no problems. 
94.
In a parallel circuit if one of the light bulbs burns out the rest _________.
a)
stop the flow of electricity
b)
 can still light up
c)
 will go out
d)
of the light bulbs burn out also
95.
What kind of circuit is this?
a)
Series
b)
Consecutive
c)
Parallel
d)
Training
96.
Which word means how hard it is for electrons to flow?
a)
Current
b)
Voltage
c)
Resistance
d)
Power
97.
In a series circuit, which of the following is the same throughout the circuit?
a)
Resistance
b)
Voltage
c)
Current
d)
Power
98.
A circuit with 3 resistors, 20 Ohms, 10 Ohms, and 20 Ohms are in series. What is the total resistance?
a)
43 Ohms
b)
50 Ohms
c)
60 Ohms
d)
33 Ohms
99.
What voltage is needed to produce 2A of current through a 10Ω resistor?
a)
20V
b)
0.2V
c)
5V
d)
2V
100.
What is voltage?
a)

The flow of protons

b)
The number of charged particles that pass each second
c)
The difference in potential energy of charged particles
d)
The rate at which energy is being transformed

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