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Science 8 Online Revision 1

Total questions: 80

Worksheet time: 3600secs

Name
Class
Date
1.
For Darwin, how have animals and plants survived?
a)
Through luck
b)
Through natural selection
c)
Through careful management
d)
Through choice
2.
Who was the naturalist that traveled the world to study plants and animals?
a)
Albert Einstein
b)
Charles Darwin
c)
Charles Barkley
d)
Isaac Newton
3.
The gradual change in species over time is...
a)
Evolution
b)
Nucleotide 
c)
Adaptation
d)
Natural Selection
4.
Which term refers to the process by which individuals that are better suited to the environment survive and reproduce therefore passing down their genes to their offspring? 
a)
Evolution 
b)
Variation 
c)
Adaptation
d)
Natural Selection 
5.
Who first proposed binomial nomenclature as a way of classifying organisms?
a)
Carolus Linnaeus
b)
Carl's Jr.
c)
Charles Darwin
d)
Henry Groseclose
6.

Which of these pairs are both gametes?

a)

Sperm and ovum

b)

Ovum and zygote

c)

Zygote and sperm

7.

Which pair of sex chromosomes shows a human female?

a)

YY

b)

XY

c)

XX

8.

How many chromosomes do humans have?

a)

2

b)

23

c)

46

9.

What shape is DNA?

a)

Double helix

b)

X-shaped

c)

Spherical

10.
Tool used by a taxonomist to identify an unknown organism is a:
a)
dichotomous key
b)
binomial nomenclature
c)
scientific name
d)
binomial key
11.
A dichotomous key for trees is provided. Hikers found a tree that has large brown cones and single sharp needles. What species of tree have the hikers found?
a)
Juniper
b)
Pine
c)
Spruce
d)
Fir
12.
A student discovers an arachnid with a segmented abdomen, long legs, and a tail with no stinger. The student uses the dichotomous key below to identify it. Which arachnid has the student found?
a)
Whip Scorpion
b)
Wind Scorpion
c)
Daddy long legs
d)
Scorpion
13.

Structural adaptations pertain to the........

a)

Mind

b)

Body

c)

Behavior

14.

Behavioral adaptations pertain to.....

a)

the body

b)

outside the body

c)

inside the body

d)

what the animal does to survive

15.

Why do you think that birds would have a rapidly beating heart while in flight?

a)

More heart beats means more oxygen to their wing muscles

b)

They are able to make their own food

c)

It helps them steer

16.

A polar bear is white like the snow surrounding it in its habitat. Describe this adaptation.

a)

Regeneration

b)

Mimicry

c)

Camouflage

d)

Hibernation

17.

When humans select traits that they want in an animal and only mate animals with that trait, this is an example of what?

a)

Natural Selection

b)

Evolution

c)

Variation

d)

Selective Breeding

18.

Where did Charles Darwin make his famous discovery?

a)

South America

b)

Off the coast of the British Isles

c)

Tasmania

d)

Galapagos Islands

19.
An organism that survives longer is more likely to produce_______offspring
a)
less
b)
the same amount
c)
more
d)
no
20.
Which is an example of a trait that is an adaptation for cold climate but not for warm climate?
a)
thick fur and fat
b)
long claws
c)
camoflauge
d)
poisonous chemicals
21.
What is the name of the medicines given to people who have bacterial infections?
a)
benedryl
b)
morphine
c)
antibiotics
d)
probiotics
22.
Change in a gene or chromosome
a)
evolution
b)
variation
c)
mutation
d)
adaptation
23.

A temperature increase causes the particles ......

a)

to slow down

b)

move faster

c)

collide higher

d)

in the right order

24.

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

a)

concentration

b)

surface area

c)

temperature

d)

reactants

25.

Increasing the temperature gives particles more __________.

a)

Time

b)

Energy

c)

Space

d)

Frequency

26.

Substance that changes the rate of a chemical reaction without being consumed in the reaction

a)

bonding

b)

catalyst

c)

chemical reaction

d)

activation energy

27.

Icing sugar has a greater ______ _____ than a solid cube of

sugar.

a)

Surface Area

b)

Catalyst

c)

Temperature

28.
In an exothermic reaction, heat is ...
a)
taken in
b)
given out
29.
In an endothermic reaction, heat is 
a)
taken in
b)
given out
30.

The law of conservation energy states:

a)

Energy can be created, but not destroyed

b)

Energy cannot be created but can be destroyed

c)

Energy can not be created nor destroyed

31.

The 'v' in the kinetic energy formula stands for

a)

Velocity

b)

Viscosity

c)

Variance

32.

Kinetic Energy

a)

Energy of movement

b)

Energy that is stored

c)

Energy that is made

33.

Potential Energy

a)

Energy of movement

b)

Energy that is stored

c)

Energy that can be destroyed

34.

What is non-renewable energy

a)

Natural energy that has a limited supply

b)

Natural energy which does not have a limited supply

c)

An energy source that is not replaced or is replaced extremely slowly

35.

Which one of the following is the unit of energy ……………….

a)

Kelvin

b)

Joule

c)

Kg

d)

Newton

36.

Water stored in dam has ……………. energy

a)

kinetic

b)

potential

c)

rotational

d)

vibrational

37.

A fire is being used to warm you up. What form of energy is being used?

a)

Electrical Energy

b)

Thermal Energy

c)

Potential Energy

d)

Light Energy

38.
Besides coal and natural gas, another fossil fuel  is
a)
petroleum/oil
b)
biomass
c)
electricity
d)
uranium
39.
Fossil fuels are nonrenewable  resources because they
a)
take millions of years to form
b)
are easily replaced
c)
are in high demand
d)
don't pollute the air
40.
The source of energy that comes from the intense heat beneath Earth's surface is
a)
nuclear fusion
b)
geothermal energy
c)
solar energy
d)
chemical energy
41.
Which of the following is an example of biomass?
a)
food crops
b)
flowing water
c)
coal
d)
uranium
42.
All of the following are renewable except
a)
uranium
b)
solar
c)
hydropower
d)
food crops (biomass)
43.
Moving water, tides, and dams are examples of
a)
hydropower
b)
fossil fuels
c)
geothermal energy
d)
radiant energy
44.
According to the graph, what sector is the greatest user of energy?
a)
industry
b)
commercial
c)
transportation
d)
residential
45.
Approximately how much energy does the transportation sector use?
a)
27%
b)
52%
c)
14%
d)
8%
46.
What is the best title for the following?
geothermal
solar
wind
a)
fossil fuels
b)
nonrenewable energy
c)
heat energy
d)
renewable energy
47.
Too much __________ released into the atmosphere causes global warming.
a)
sulphur dioxide
b)
nitrogen oxides
c)
carbon monoxide
d)
carbon dioxide
48.

Which energy source is used in the following power plant?

a)

Nuclear power

b)

Tidal power

c)

Solar power

d)

Hydroelectric power

49.

Which energy source is used in the following power plant?

a)

Nuclear power

b)

Tidal power

c)

Solar power

d)

Hydroelectric power

50.

Heat transfer occurs

a)

in many directions

b)

both from warm objects to colder ones and from cold objects to warmer ones

c)

only from warm objects to colder ones

d)

only from cold objects to warmer ones

51.
What happens to particles as they cool down?
a)
They slow down
b)
Nothing
c)
They don't move
d)
They speed up
52.
As you touch a hot stove the heat transfers -
a)
from your hand to the stove
b)
from the stove to your hand
c)
It doesn't transfer
53.
A barefoot student steps on a hot concrete surface. Most of the heat transferred to the student’s skin by this contact is by the process of—
a)
convection
b)
conduction
c)
vaporization
d)
radiation
54.
The diagram to the right shows a solid iron bar that is being heated in a flame. The primary method of heat transfer in the solid iron bar is—
a)
convection
b)
conduction
c)
absorption
d)
radiation
55.
what is conduction?
a)
direct touch
b)
air or liquids
c)
heat waves/ light waves
d)
drinking hot coffee
56.
what is convection
a)
direct touch
b)
air or liquids
c)
heat waves or light waves
d)
sunbathing outside
57.
what is radiation?
a)
direct touch
b)
air or liquids
c)
heat waves/ light waves
d)
touching the cookies out of the oven
58.
How does air travel?
a)
they don't travel
b)
hot to cold
c)
cold to hot
d)
All of the above
59.
Heat transfer in the image.
a)
conduction
b)
convection
c)
radiation
60.
Heat transfer in boiling water.
a)
Conduction
b)
Convection
c)
Radiation
61.
On a cold rainy day a baby is touching a cold window.  It feels so cold. Which way is the heat moving moving? 
a)
Cold is moving from the window to the hand.
b)
Heat is moving from the hand to the window.
c)
Heat doesn't move.
d)
It moves in currents
62.
Which material is the best conductor of heat?
a)
glass
b)
styrofoam
c)
metal
d)
wood
63.
What materials would be good insulators for a handle on a pan or pot that would be used on the stove?
a)
wood or plastic
b)
metal or rubber
c)
wood or rubber
d)
copper or steel
64.
Jenny poured some hot chocolate into a cup and stirred it with a metal spoon.  She noticed the spoon was really warm.  What is the best explanation for this?
a)
The spoon is a conductor.
b)
The spoon reflects heat.
c)
The spoon is an insulator.
d)
She touched the spoon first and waited to touch the cup.
65.
Radiation is heat transfer by-
a)
Touch
b)
Circles
c)
Waves
66.
In what direction do hot liquids and gasses move?
a)
Side to Side
b)
Down
c)
Up
d)
Back and Forth
67.
When the 2nd story of a house is warmer than the 1st floor of a house is heat transfer through 
a)
conduction
b)
convection
c)
radiation
d)
thermal equilibrium
68.
The sun warming your skin is an example of heat transfer through 
a)
conduction
b)
convection
c)
radiation
d)
thermal electricity
69.
Is a measure of how hot or cold something is 
a)
Cold
b)
Heat
c)
Temperature
d)
Thermal Energy 
70.

What's the definition of Conductivity?

a)

the ability of a substance to dissolve in water

b)

The ability to burn

c)

The ability of a material to allow heat and electricity to pass through it

71.

What is the definition of Combustibility?

a)

The ability of a material to allow heat and electricity to pass through it.

b)

The ability to burn

c)

How strong of an acid a compound is

72.

Which type of energy in gasoline is transformed into mechanical energy in a motorcycle engine?

a)

chemical

b)

nuclear

c)

magnetic

d)

electrical

73.

Where does a roller coaster have the most potential energy?

a)

the top of the first hill

b)

the bottom of the first hill (after it has gone down the hill)

c)

the very beginning of the roller coaster

d)

when it stops

74.
A measurement, an observation or a statement that can be strictly defined is
a)
A fact
b)
A prediction
c)
An opinion
d)
An hypothesis
75.
In a controlled experiment, the factor that is measured or observed is the
a)
Independent Variable
b)
Dependent Variable
c)
Constant
d)
Control
76.
The actual flow of electrons is called _______.
a)
Molecule
b)
Magnetism
c)
Current
d)
Electrica
77.
The opposition to electrical current is called _________.
a)
 Attraction
b)
Resistance
c)
Magnetism
d)
Attract
78.

Electricity is the flow of _________

a)

Neutrons

b)

Protons

c)

Electrons

d)

Cybertron

79.

In 1831, Electricity was first created using a wire coil and a ___________

a)

Penny

b)

Axe

c)

Magnet

d)

Sock

80.

Which can occur at any temperature?

a)

Boiling

b)

Evaporation

c)

Both

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