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JC 3S Xmas Quiz

Total questions: 175

Worksheet time: 29hrs 2mins

Name
Class
Date
1.

List four factors that affects the rate of a reaction

a)

temperature

b)

concentration

c)

surface area

d)

volume

e)

catalysts

2.

How does a catalyst work in speeding up a reaction?

a)

By lowering the activation energy or reaction

b)

by giving them more energy

c)

by making them more available

3.

Why does a higher concentration increase the rate of reaction?

a)

it increases the amount of reactants

b)

it lowers the activation energy

c)

it increases the energy of particle collisions

d)

it increases the frequency of particle collisions

4.

Why does a higher temperature increase the rate of a reaction?

a)

it increases both the frequency and energy of particle collisions

b)

it only increases the frequency of particle collisions

c)

it only increases the energy of particle collisions

d)

it reduces the activation energy of the reaction

5.

what factors can affect the value of the activation energy of a reaction?

a)

The presence of a catalyst

b)

changes in temperature

c)

changes in concentration of the reactants

d)

changes in pressure

6.
Catalysts are thought to increase the rate of a chemical reaction by
a)
supplying the energy needed to overcome the activation energy
b)
increasing the temperature of the reaction
c)
providing less surface area for the reaction
d)
providing an alternative reaction pathway with a lower activation energy
7.
Increasing the temperature of a chemical reaction
a)
lowers the activation energy of the reaction
b)
increases the energy of the reactant particles only
c)
increases the value of ΔH for the reaction
d)
increases the energy of the reactant and product particles
8.
What is the rate of reaction?
a)
How fast a reaction is 
b)
How big a reaction is
c)
How loud a reaction is
d)
How much gas a reaction produces
9.

Grinding a effervescent tablet into powder increases the rate of reaction due to increased

a)

concentration

b)

surface area

c)

temperature

d)

reactants

10.

The ______________is required to break the bonds of the reactants.

a)

Carbonic energy

b)

Activation energy

c)

Plutonic energy

d)

Energi Gaib

11.

Which of the following would increase the rate of a chemical reaction?

a)

Freezing the chemicals

b)

Increasing the temperature of the reagents

c)

Removing a catalyst

d)

Using less chemicals

12.

Which of the following would increase the rate of a chemical reaction?

a)

Removing a catalyst

b)

Diluting the chemicals

c)

Decreasing the temperature

d)

Adding a catalyst

13.

Which of the following would increase the rate of a chemical reaction?

a)

Lowering temperatrure

b)

Removing a catalyst

c)

Making the chemicals more concentrated

d)

Using less chemicals

14.

Which colour on the graph would represent the solution with the higher temperature?

a)

Red

b)

Blue

c)

None

d)

Both

15.

Which colour on the graph would represent the solution with a catalyst?

a)

Red

b)

Blue

c)

Both

d)

None

16.

Which of the following would increase the rate of CO2 made using marble chips and HCl?

a)

Lowering the temperature

b)

Crushing the marble chips

c)

Using less acid

d)

Using bigger marble chips

17.

Which of the following is not made when marble chips are mixed with HCl?

a)

CO2

b)

CaCl2

c)

H2O

d)

O2

18.

Which of the following lines represents the chemical with the lower concentration?

a)

Red

b)

Blue

c)

Both

d)

None

19.

Which of the following colours represent the solution with the largest particle size?

a)

Red

b)

Blue

c)

Both

d)

None

20.
The burning of fuels , such as coal, natural gas, or oil involves a(n) __________reaction.
a)
chemical
b)
physical
21.
Increasing the surface area of the reactants will increase the rate of the reaction.
a)
True
b)
False
22.
The effect of a catalyst on a reaction is to raise the activation energy.
a)
True
b)
False
23.
All reactions require activation energy.
a)
True
b)
False
24.

An enzyme (biological catalyst) increases the rate of a reaction.

a)

True

b)

False

25.
Increasing the temperature of a reaction will __________ the rate of the reaction.
a)
increase
b)
decrease
26.
In an ____________reaction, energy is released.
a)
exothermic
b)
endothermic
27.

How does concentration affect the rate of reaction?

a)

Increasing concentration increases the rate

b)

Increasing concentration decreases the rate

28.

Why does increasing concentration increase the rate of reaction? Tick all correct options.

a)

There is a lower activation energy

b)

There are more particles in the same volume

c)

There are more frequent collisions

d)

The particles have a higher surface area

29.

How does surface area affect the rate of reaction?

a)

Increasing surface area increases the rate

b)

Increasing concentration decreases the rate

30.

Why does increasing surface area increase the rate of reaction? Tick all correct options.

a)

There is a lower activation energy

b)

There are more particles in the same volume

c)

There are more frequent collisions

d)

The particles have a higher surface area

31.

How does temperature affect the rate of reaction?

a)

Increasing temperature increases the rate

b)

Increasing concentration decreases the rate

32.

Why does increasing temperature increase the rate of reaction? Tick all correct options.

a)

There is a lower activation energy

b)

The particles have higher energy

c)

There are more frequent collisions

d)

The particles have a higher surface area

33.

How do catalysts affect the rate of reaction?

a)

Adding a catalyst increases the rate

b)

Adding a catalyst decreases the rate

34.

Why does adding a catalysts increase the rate of reaction? Tick all correct options.

a)

There is a lower activation energy

b)

The particles have higher energy

c)

There are more frequent collisions

d)

The particles have a higher surface area

35.

This equipment could be used to measure the rate of what type of reaction?

a)

One that produces a gas

b)

One that produces a solid

c)

One that has a colour change

36.

Which of these are the activation energy?

a)

A

b)

B

c)

C

d)

D

37.
What is rate of reaction?
a)
How fast a reaction is
b)
How big a reaction is
c)
How loud a reaction is
d)
How much gas a reaction produces
38.
What is required for a reaction to occur?
a)
Collisons
b)
Sufficient Energy
c)
Collisions with sufficient energy
d)
Nothing
39.
What does NOT happen when the temperature is increased?
a)
Particles collide more often
b)
Particles collide with more energy
c)
Particles move faster
d)
More particles collide in the correct orientation
40.
What does a catalyst do?
a)
Stabilises a reaction
b)
Increases the rate of reaction
c)
Cools the reaction down
d)
Increases the concentration of the reaction
41.
In an exothermic reaction, heat is ...
a)
taken in
b)
given out
42.
In an endothermic reaction, heat is ,,,
a)
taken in
b)
given out
43.
This helps to speed up a reaction but does not take part in the chemical reaction. 
a)
coeffiecents
b)
reactants
c)
catalyst
d)
combustion
44.
The amount of a substance in a given volume.
a)
concentration
b)
temperature
c)
surface area
d)
catalyst
45.
Grinding a seltzer tablet into powder increases the rate of reaction due to increased
a)
concentration
b)
surface area
c)
temperature
d)
reactants
46.
Exposing more particles for collisions is an increase in 
a)
concentration
b)
surface area
c)
temperature
d)
catalyst
47.
Increasing the concentration increases the speed of reaction by
a)
lowering activation energy
b)
increasing collisions
c)
speeding up the reactants
d)
exposing more reactant
48.
True or False.  Inhibitors increase the rate of a reaction.
a)
True
b)
False
49.
True or False.  Catalysts speed up the rate of a reaction by lowering the activation energy.
a)
True
b)
False
50.
True or False.  Catalysts speed up the rate of a reaction by lowering the activation energy.
a)
True
b)
False
51.
In an exothermic reaction the products have
a)
more energy than the reactants
b)
the same energy as the reactants
c)
less energy than the reactants
d)
no energy
52.
In an endothermic reaction the products have 
a)
more energy than the reactants
b)
less energy than the reactants
c)
the same energy as the reactants
d)
no energy
53.
The minimum amount of energy required for a reaction to proceed.
a)
activation energy
b)
exothermic energy
c)
endothermic energy
d)
catalyst
54.
Which factors increase the rate of a reaction.
a)
increasing temperature
b)
increasing concentration
c)
increasing surface area
d)
all of these
55.
Which factors decrease the rate of a reaction?
a)
adding a catalyst
b)
decreasing the temperature
c)
increasing surface area
d)
increasing concentration
56.
Increasing concentration increases reaction rate due to more collisions.
a)
True
b)
False
57.

In an endothermic reaction, heat is ...

a)

taken in

b)

given out

58.
In an exothermic reaction, heat is ...
a)
taken in
b)
given out
59.

6. Which of these processes is always exothermic?

a)

A. evaporation

b)

B. burning

c)

C. insulation

d)

D. melting

60.

1. Equal amounts of four different substances (A-D) where added separately to equal amounts of an acid and a thermometer placed in the mixture. For which substance is the reaction the most exothermic?

a)

A. temperature rises by 3 °C\degree C    

b)

B. temperature falls by 5 °C\degree C   

c)

C. temperature falls by 3 °C\degree C    

d)

D. temperature rises by 5 °C\degree C  

61.
If a chemical reaction is EXOTHERMIC, the temperature would....
a)
Stay the same
b)
Increase
c)
Decrease
62.
During an endothermic reaction in a beaker if we are part of the surroundings and touched the beaker, it would feel _______. 
a)
Warm
b)
Cold
63.
Baking bread and cooking an egg are examples of....?
a)
Endothermic processes
b)
Exothermic processess
c)
None of these 
64.
What type of reaction is shown in the photo?
a)
Exothermic
b)
Isothermic
c)
Endothermic
d)
None of the  above
65.
Is photosenthysis an Exothermic or an Endothermic reaction?
a)
Endothermic
b)
Exothermic
66.

What type of reaction occurs in a hand warmer?

a)

exothermic

b)

endothermic

67.

5. When ammonium chloride dissolves in water the temperature falls. The type of energy change is described as?

a)

A. exothermic    

b)

 B. activated  

c)

C. decomposition            

d)

D. endothermic

68.

O2(g) + 2 H2 (g) → 2 H2O (g) + EnergyO_2\left(g\right)\ +\ 2\ H_2\ \left(g\right)\ \rightarrow\ 2\ H_2O\ \left(g\right)\ +\ Energy  

a)

endothermic

b)

exothermic

69.

6 CO2+ 6 H2O + Energy → C6H12O6 + 6 O26\ CO_2+\ 6\ H_2O\ +\ Energy\ \rightarrow\ C_6H_{12}O_6\ +\ 6\ O_2

a)

endothermic reaction

b)

exothermic reaction

70.

A student mixed two chemicals to allow them to react. The temperature before the reaction was 25 ° C. The temperature after the reaction was 18° C. Which of the following is true?

a)

It is an exothermic reaction

b)

It is an endothermic reaction

71.

This is when heat is absorbed, it is an

a)

Exothermic reaction

b)

endothermic reaction

c)

both

d)

none

72.

When heat is released it is an

a)

exothermic reaction

b)

endothermic reaction

c)

both

d)

none

73.

Your hands get cold outside from not wearing gloves

a)

exothermic

b)

endothermic

c)

both

d)

none

74.

Fireworks are an example of

a)

exothermic

b)

endothermic

c)

both

d)

none

75.

A melting ice cube is an example of

a)

exothermic

b)

endothermic

c)

none

d)

both

76.
Have you ever eaten sherbet sweets candy? They fizz in your mouth and your tongue feels cold. Why do you think that is?
a)
It is an exothermic reaction
b)
It is an endothermic reaction
c)
It is made of ice
d)
It is dissolving your mouth
77.
Is respiration an Endothermic or an Exothermic reaction?
a)
Endothermic
b)
Exothermic
78.
What is the activation energy?
a)
The energy of the products
b)
The energy of the reactants
c)
The minimum energy needed by the reactants to form the products.
d)
The energy lost in the reaction
79.
According to collision theory, what must the reactants have in order to form products?
a)
The right size
b)
The right shape
c)
Enough energy
d)
Nothing
80.
Which factors increase the rate of a reaction.
a)
increasing temperature
b)
increasing concentration
c)
increasing surface area
d)
all of these
81.
What kind of reaction is this?
a)
Endothermic
b)
Exothermic
c)
Cannot be determined
82.

How does a catalyst work in speeding up a reaction?

a)

By lowering the activation energy or reaction

b)

by giving them more energy

c)

by making them more available

83.

What term is given to a reaction which transfers heat energy to the surroundings?

a)

Endothermic

b)

Reversible

c)

Exothermic

d)

Exotermic

84.

When barium hydroxide and ammonium chloride react, the temperature of the mixture decreases. What kind of reaction is this?

a)

Endothermic

b)

Decomposition

c)

Exothermic

d)

Indothermic

85.

When calcium reacts with water, the temperature changes from 18°C to 39°C. Which statement is correct?

a)

The solution at the end is acidic

b)

The reaction is reversible

c)

The reaction is exothermic

d)

The reaction is endothermic

86.
What letter represents the energy of the products?
a)
A
b)
B
c)
C
d)
D
87.
What type of reaction is this?
a)
Endothermic
b)
Exothermic
88.

What do plants use glucose (sugar) for?

a)

It can be stored for later use.

b)

It can be used for growing.

c)

It can be used to make new cells.

d)

It can be used to make seeds and flowers.

e)

All of the above.

89.

Which of the following is the correct equation for PHOTOSYNTHESIS?

a)

light + carbon dioxide + water --> glucose + oxygen

b)

carbon dioxide + sugar + water --> oxygen + light

c)

oxygen + light + water --> carbon dioxide + sugar

d)

carbon dioxide + oxygen + water --> Light+ Sugar

90.
Which choice correctly shows the gases that enter and exit plants during photosynthesis?
a)
Enter: Oxygen
Exit: Carbon dioxide
b)
Enter: Water vapor
Exit: Glucose
c)
Enter: Carbon dioxide
Exit: Oxygen
d)
Enter: Light
Exit: Water vapor
91.
Which of these conditions would decrease the rate of photosynthesis in a plant?
a)
Above average precipitation
b)
Changing the daylight hours from 14 hrs to 10 hrs
c)
Changing the CO2 concentration from 380 ppm to 410 ppm
d)
All of these choices
92.
How does carbon dioxide get into the leaves of a plant?
a)
It's absorbed by the roots
b)
It's made in a chemical reaction in the stem
c)
It enters through the stomata
d)
It goes through the flowers
93.
Why do plants conduct photosynthesis?
a)
To make light
b)
To make mitochondria
c)
To make glucose
d)
To release carbon dioxide
94.

How does most of the water needed by the plant get into its leaves?

a)

It enters through the stomata

b)

The roots absorb it and then it travels up the stem

c)

It's made during a chemical reaction in the leaf

d)

The flowers capture water and deliver it to the leaves

95.

Is glucose (C6H12O6) a reactant (raw material) or product of photosynthesis?

a)

Product

b)

Reactant

c)

Neither

96.

Which organelle stores water for use in photosynthesis?

a)

Chloroplast

b)

Cell Membrane

c)

Vacuole

d)

Nucleus

97.

Select all that are products of photosynthesis.

a)

Water

b)

Carbon Dioxide

c)

Oxygen

d)

Sunlight (Light Energy)

e)

Glucose (Sugar/food)

98.

Select all that are raw materials for photosynthesis.

a)

Water

b)

Carbon Dioxide

c)

Oxygen

d)

Sunlight (Light Energy)

e)

Glucose (Sugar/food)

99.

Which organelle is responsible making food (glucose) using sunlight?

a)

Cell Membrane

b)

Nucleus

c)

Chloroplast

d)

Mitochondria

100.
What gas  do plants give off after conducting photosynthesis that humans/animals need in order to live?
a)
Oxygen
b)
Carbon
c)
Nitrogen
d)
Hydrogen
101.
Plants take in ________from the air as one key ingredient for photosynthesis
a)
oxygen
b)
soil
c)
carbon dioxide
d)
sugar
102.
The main source of energy for all life comes from ____.
a)
the Earth
b)
the moon
c)
the sun
d)
the food we eat/make
103.
Why are producers (plants) important for all life on Earth? 
a)
They make our world more beautiful
b)
They make the planet look green
c)
They use carbon dioxide and give us oxygen
d)
They provide shade for insects
104.
__________ energy from the sun is changed intto __________ energy during photosynthesis
a)
Chemical energy to light energy
b)
Light energy to chemical energy
c)
Thermal energy to light energy
d)
Electrical energy to chemical enerfy
105.
What are the 3 key ingredients needed for photosynthesis
a)
glucose, oxygen, carbon dioxide
b)
carbon dioxide, water, glucose
c)
water, soil, sunlight
d)
sunlight, water, carbon dioxide
106.
Which of the following statement is true regarding photosynthesis
a)
creates oxygen for animals to breath
b)
creates energy for consumers to use
c)
creates food for plants to use
d)
all of these are correct
107.
Which of the following examples go through the process of photosynthesis?
a)
bees
b)
algae
c)
humans
d)
mushrooms
108.
A student is collecting the gas given off from a plant in bright sunlight at a temperature of 27°C. The gas being collected is probably ________.
a)
oxygen
b)
carbon dioxide
c)
ATP
d)
glucose
109.
What is the name of the sugars a plant produces after photosynthesis
a)
Glucose
b)
Sugar
c)
ATP
d)
Oxygen
110.
Which of the following is not needed as a key ingredient for photosynthesis to occur?
a)
sunlight
b)
carbon dioxide
c)
water
d)
oxygen
111.
Why do producers need humans?
a)
Producers use the oxygen humans make
b)
Producers need someone to water them
c)
Producers use the carbon dioxide humans make and turn it into oxygen
d)
Producers use the glucose humans give them
112.
What is this process called?
a)
respiration
b)
photosynthesis
c)
Conservation of Mass
d)
Ocean Acidification
113.
What is this process called?
a)
respiration
b)
photosynthesis
c)
Conservation of Mass
d)
Ocean Acidification
114.
What is the source of energy for photosynthesis?
a)
carbohydrates-chemical
b)
sunlight-radiant
c)
heat-thermal
d)
television-electrical
115.
What are the reactants (what's needed) for photosynthesis?
a)
glucose and oxygen
b)
light, water, and carbon dioxide
116.
What gas is released by plants during photosynthesis?
a)
sulfur
b)
carbon dioxide
c)
oxygen
d)
hydrogen
117.
What is the purpose of photosynthesis?
a)
make glucose
b)
make ATP
c)
make light
d)
release carbon dioxide
118.
What are the products (what's made) during photosynthesis?
a)
glucose and oxygen
b)
water, light, and carbon dioxide
119.
What is the gas we breath out that plants use for photosynthesis?
a)
sulfur
b)
carbon dioxide
c)
oxygen
d)
hydrogen
120.
Which of the following is the correct equation for PHOTOSYNTHESIS?
a)
CO2 + light + H2O --> O2 + Sugar
b)
CO2 + sugar + H2O --> O2 + light
c)
O2 + light + H2O --> CO2 + Sugar
d)
CO2 + O2 + H2O --> Light+ Sugar
121.
If all four plants were watered daily but placed in a closet, receiving no sunlight, what process would NOT occur?
a)
Ingestion of carbon dioxide
b)
Filtration of water through the soil
c)
Photosynthesis
d)
Water absorbtion
122.
What is the pigment in chloroplasts that performs photosynthesis?
a)
Chlorosynthesis
b)
Chlorophyll
c)
ADP
d)
Electron Transport
123.
Plants need ________ for photosynthesis
a)
oxygen
b)
soil
c)
carbon dioxide
d)
sugar
124.
What do plants give off after photosynthesis?
a)
Oxygen
b)
carbon
c)
nitrogen
d)
hydrogen
125.

What is the Law of Conservation of mass?

a)

Mass is created in a chemical reaction

b)

Mass is created in a physical change

c)

New chemicals formed from a chemical reaction have a larger overall mass than the original reactants

d)

Mass is never created or destroyed. The amount of mass stays the same before and after the reaction

126.

Which is Chemical Equation is Balanced and follows the conservation of mass?

a)

CH₄+O₂------CO₂+2H₂O

b)

H₂+O₂-----2H₂O₄

c)

4Al+3O₂-----2Al₂O₃

127.

When light intensity goes up, the rate of photosynthesis goes _______.

a)

up

b)

down

c)

at the same rate. It does not change.

128.
Which choice correctly shows the gases that enter and exit plants during photosynthesis?
a)
Enter: Oxygen
Exit: Carbon dioxide
b)
Enter: Water vapor
Exit: Glucose
c)
Enter: Carbon dioxide
Exit: Oxygen
d)
Enter: Light
Exit: Water vapor
129.
Plants need ________from the air for photosynthesis
a)
oxygen
b)
soil
c)
carbon dioxide
d)
sugar
130.
What molecule absorbs sunlight during photosynthesis?
a)
Epidermis
b)
thylakoid
c)
the leaf
d)
chlorophyll
131.
Which statement about photosynthesis is correct?
a)
Plants get the energy they need for photosynthesis from water.
b)
Plants get the energy they need for photosynthesis from soil.
c)
Plants get the energy they need for photosynthesis from sunlight.
d)
Plants do not require energy to perform photosynthesis.
132.
The products of photosynthesis are
a)
water and carbon dioxide
b)
oxygen and water
c)
sugar and cabon dioxide
d)
oxygen and sugar (glucose)
133.
The main source of energy for all life comes from ____.
a)
the Earth
b)
the moon
c)
the sun
d)
the food we eat/make
134.
Why are plants important to life on Earth?
a)
They make our world more beautiful
b)
They make the planet look green
c)
They use carbon dioxide and give us oxygen
d)
They provide shade for insects
135.
Why do plants conduct photosynthesis?
a)
To make light
b)
To make mitochondria
c)
To make glucose
d)
To release carbon dioxide
136.

How does most of the water needed by the plant get into its leaves?

a)

It enters through the stomata

b)

The roots absorb it and then it travels up the xylem

c)

It's made during a chemical reaction in the stem

d)

The flowers capture water and deliver it to the leaves

137.

Why does chlorophyll make plants appear green?

a)

Reflecting all colors expect green

b)

Absorbing all colors and reflecting back green

c)

Not absorbing any colors

d)

Leaves aren't green, what do you mean?!

138.

_________ is the process of change by which species of organism change over time.

a)

Nucleotides

b)

Evolution

c)

Mutation

d)

Carbon

139.

Birds are eating all the green beetles. Because the brown beetles are surviving they reproduce more and make more brown beetles. This is called ___________

a)

Artificial Selection

b)

The Theory on the Origin of Species

c)

Natural Selection

d)

Mutation

140.

Darwin wrote that the organisms best suited to their environments will .....

a)

Increase in Number

b)

Go Extinct

c)

Mutate More often

141.

Which trait did Darwin pay most attention to about the finches in the galapagos islands?

a)

Their Feathers

b)

Their Horns

c)

Their Size

d)

Their Beak Shape

142.

4. When the industrial revolution started, the trees have been covered in soot from coal factories. Which moth will be more successful in this environment?

a)

White Moth

b)

Dark Moth

c)

Both are Equally Successful in this Environment

143.

Darwin's ship was called ________

a)

HMS Bugle

b)

HMS Beetle

c)

HMS Asparagus

d)

HMS Beagle

144.
This is a process in which organisms gradually change over time.
a)
Environment
b)
Competition
c)
Evolution
d)
Fossils
145.
These are natural differences within a species.
a)
Evolution
b)
Genetic variation
c)
Biological diversity
d)
Populations
146.
This is the variation of living organisms.
a)
Biological diversity
b)
Evolution
c)
Environment
d)
Natural selection
147.
This is an inherited trait that helps an organism survive and reproduce in its environment.
a)
Evolution
b)
Population
c)
Environment
d)
Adaptation
148.
The death of every member of a species.
a)
Competition
b)
Population
c)
Extinction
d)
Evidence
149.
Microorganisms can be found:
a)
The the ocean, inside and outside your body
b)
On plants and animals
c)
In medicine and your food
d)
All of the above
150.
Some bacteria is known as ________________ and cause disease.
a)
pathogens
b)
flagella
c)
influenza
d)
ebola
151.

Bacteria is known as__________________ in an ecosystem when feeding on dead organisms.

a)

Decomposers

b)

Herbivore

c)

Pathogens

d)

Infections

152.

Influenza is a disease caused due to

a)

bacteria

b)

Virus

c)

Protozoa

d)

None of the above

153.

Mushroom belongs to

a)

Algae

b)

Virus

c)

Fungi

d)

None of the above

154.
The ability of a population of bacteria to survive the lethal effects of an antibiotic.
a)
Vaccine
b)
Lysogenic Cycle
c)
Antibiotic Resistance
d)
Capsid
155.

A fungus used as a medicine.

a)

Yeast

b)

Bacteria

c)

Penicillin

d)

Algae

156.

_______________ are parasites, which means they can only survive inside the cells of other living things.

a)

Viruses

b)

Protozoa

c)

Algae

d)

Fungi

157.
Fungi is benefical to us because of the following reason:
a)
They are a source of oxygen
b)
They can clean up pollution
c)
They are a source of antibiotics
d)
They help to clean run off from waste
158.
_________________ bacteria are in your _________________ to help digest food.
a)
Helpful; throat
b)
Helpful; stomach
c)
Harmful; esophagus
d)
Harmful; lungs
159.

Alexander Fleming discovered...

a)

Anesthesia

b)

Penicillin

c)

Microscope

d)

Surgery

160.

Microorganisms are found

a)

in air

b)

on our hands

c)

on surfaces

d)

everywhere

161.

Microorganisms are

a)

Harmful

b)

useful

c)

can be harmful and useful

d)

have no effect o human body

162.

Which of these microorganism causes common cold ?

a)

bacteria

b)

virus

c)

antibiotic

163.

What is the other word for a harmful microorganisms ?

a)

infectious

b)

antibiotic

c)

pathogen

d)

flora

164.

Bacteria can be both helpful and harmful in food.

a)

True

b)

False

165.

Bacteria in yogurt is harmful.

a)

True

b)

False

166.

Harmful viruses can cause:

a)

Influenze

b)

cold

c)

Both of the above

d)

Neither of the above

167.

What is this?

a)

Algae

b)

Bacteria

c)

Virus

d)

Fungus

168.

What happen to the host when infected by pathogens?

a)

show symptom of the disease like cough, fever, cold etc.

b)

gain extra energy and power

c)

do not show any sign of body deterioration

169.

" The organisms that can cause disease' is called _______

a)

bacteria

b)

pathogen

c)

probiotic

d)

biosome

170.

What is a mutation?

a)

Change that helps a living thing survive in its environment

b)

Change in DNA structure

c)

Natural differences in traits (like color)

171.

What is an variation?

a)

Change that helps a living thing survive in its environment

b)

Change in DNA structure

c)

Natural differences in traits (like color)

172.

What is this?

a)

Variation

b)

Adaptation

c)

Mutation

173.

What does evolution mean?

a)

changes to a species over time

b)

changes to one living thing in a life time

c)

changes in traits colors

174.
How do adaptations help animals?
a)
to hide from predators
b)
to hunt for food
c)
to survive in their habitats
d)
All of these are correct
175.
____ is where better adapted organisms survive to pass traits along to their offspring.
a)
evolution
b)
natural selection
c)
extinction
d)
artificial selection

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