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Worksheets10 Gen Sem 2 Exam Review
Total questions: 176
Worksheet time: 4hrs 20mins
What kind of energy is being shown in the picture?
Light
Gravitational
Potential
Kinetic
As the ball is dropped, the potential energy decreases while the kinetic energy increases however the amount of energy stays the same.
True
False
Which is the best example of kinetic energy?
A car sitting on top of a hill
A skateboard on the sidewalk
A wagon rolling down a hill
A powerwheel parked in the yard
Before fruit falls from a tree, how does energy flow?
Potential - Kinetic - Sound
Light - Kinetic - Heat
Potential - Sound - Heat
Solar - Kinetic - Heat
A hair dryer goes through three energy transformations. What are they?
electrical
thermal
mechanical
mechanical
thermal
electrical
mechanical
electrical
thermal
thermal
electrical
mechanical
Sound Energy
Mechanical Energy
Thermal (Heat) Energy
Chemical Energy
Pick the BEST Energy Conversion below for a Hydroelectric Dam.
What energy transformation occurs as a mouse produces body heat?
Chemical --> Thermal
Thermal --> Chemical
Electrical --> Thermal
Thermal --> Mechanical
The Law of Conservation of Energy states that energy is never _____________ or ____________, only transformed.
created, destroyed
created, subtracted
added, subtracted
destroyed, subtracted
A skydiver jumps out of a helicopter. What is happening in terms of energy?
He is gaining potential energy as he falls, and losing kinetic energy.
He is gaining kinetic energy as he falls and losing potential energy.
His kinetic and potential energy is always the same.
He is gaining kinetic and potential energy at the same time.
When energy is released, it dissappears.
True
False
Electrical energy is transferred to _____ Energy.
Solar
Thermal
Chemical
Electrical
What energy transformation occurs when an alarm clock rings?
electrical to mechanical, sound
chemical to mechanical,sound
electrical to thermal, chemical
mechanical to mechanical, thermal, sound
What are the energy transformations that occur when a person rides a bike to the top of a hill?
mechanical, thermal,
chemical, mechanical, thermal, electrical
chemical, mechanical, thermal, electrical, radiant
chemical, mechanical, thermal
List the energy transformations of this object.
Electrical → Mechanical/ Radiant Energy
Electrical → Mechanical / Sound / Thermal Energy
Mechanical → Chemical / Thermal energy
Mechanical→ Electrical energy
What energy transformations does fire have?
Thermal→ Sound Energy
Thermal→ Radiant energy
Chemical → Thermal energy
Chemical→ Sound energy
What is the unit for kinetic and potential energy?
Meters
Kilograms
Watts
Joules
How is thermal energy a product when you connect the hair straightener to an electric plug?
When you plug in the hair straightener to electric plug it’s already composed with thermal energy
Hair straighteners don’t have thermal energy
When you plug in the hair straightener to the electric plug it transfers it’s electric energy to thermal energy that you can use to straighten your hair
Hair Straighteners when plugged into an electric plug it turns into mechanical energy
Which sports can't Mr Coumbe play?
Volleybal
Criket
Footy
He's good at all of these cos Mr Coumbe is amazing
Which diagram models the position of a soccer ball when it has the greatest amount of gravitational potential energy?
What forms of energy are involved in hammering a nail into wood? Select all that apply
Sound
Kinetic
Electrical
Nuclear
Which of these has elastic potential energy?
a vase sitting on a shelf
a stretched rubber band
a child moving down a slide
sugars stored in the molecules of food
What energy transformation takes place when a hair dryer is used?
Energy from the sun is transformed to chemical energy.
Sound energy is transformed to thermal energy and electrical energy.
Electrical energy is transformed to thermal energy and sound energy.Electrical energy is transformed to thermal energy, sound energy, and mechanical energy
Electrical energy is transformed to thermal energy and sound energy.
A scientist performed an experiment during which she measured the energy transferred in each step of her experiment. The total quantity of energy transferred in all of the steps was less than the amount she measured at the beginning. What is the most likely explanation for this result?
Energy was destroyed during certain steps in the experiment.
The steps in the experiment required more energy than was available.
The experiments created energy that was then used up at a faster rate.
Some energy was transformed into unwanted heat or sound that was not detected.
A hot potato at 80 ºC is placed in a bowl of soup at 40 ºC. The surrounding room is at 20 ºC. Which correctly describes the directions of thermal energy transfer?
potato to soup, and soup to room
room to soup, and soup to potato
room to soup, and room to potato
soup to potato, and potato to room
A candle burning is a type of energy transformation. It is chemical energy transformed into _________ and __________ energy.
Light, kinetic
Heat, light
Heat, chemical
Kinetic, solar
The energy in of a match is:
___________
The energy out of a match is:
Heat, light, sound
Kinetic
Electrical
Chemical potential
Mechanical
You're cooking a BBQ for the AFL grand final to celebrate with your friends. What energy transformation occurs when cooking your meat?
Chemical potential -> Heat
Heat -> Chemical potential
Chemical potential -> Kinetic
Heat -> Light
What is the correct energy chain diagram that would occur in a battery powered flashlight?
chemical → electrical → light
chemical → heat → light
electrical → chemical → light
chemical → light → electrical
When the speed of moving particles increases in a substance, this shows an increase in what kind of energy?
chemical energy
thermal energy
electrical energy
mechanical energy
Choose the image below that shows potential energy decreasing then increasing if following the arrows from left to right?
How does a windmill change forms of energy?
Mechanical to electrical
Electrical to mechanical
Mechanical to light
It is unable to change forms
Which Apple has the greatest Gravitational Potential Energy?
Apple A
Apple B
Apple C
Apple D
What type of energy is transformed in the Energy Conversion shown in the image below?
Nuclear Energy
Chemical Energy
Thermal Energy
Electrical Energy
Differences in traits are called:
natural selection
genetic variations
artificial selection
adaptations
Natural selection occurs during the lifetime of a single organism.
True
False
A species could go extinct if:
food becomes more plentiful.
members of the species have adaptations to enhance survival.
the environment changes drastically and no one can adapt.
there is less competition for resources.
What is most likely to happen to moth populations in the picture shown?
Light moths--hunted easily, dark moths--population increase
Dark moths--hunted easily, dark moths--population increase
Light moths--hunted easily, light moths--population increase
Lights moths will change their color to match dark moths.
What type of environment do you think this data was collected from?
forest with primarily white-bark trees
forest with primarily dark-bark trees
A yellow morph and green morph of an insect lives in the rainforest canopy. You would expect:
the green population to increase and the yellow to decrease
both populations should stay the same
both populations will increase
the green population to decrease and the yellow to increaseThis is a wrong answer
How do you "win" at natural selection?
survive
go extinct
survive & reproduce
The special niche occupied by a particular species is called a
extinct
punctuated equilibrium
habitat
all of the above
Natural Selection is driven by a change in the environment and survival of the
Earth
Fastest
Fittest
Biggest
Two populations of the same species are separated by land barriers like rivers or mountains.
geographical isolation
temporal isolation
adaptive ratiation
behavioral isolaton
In science, a theory is an idea supported by lots of (a) .
There are three main types of evidence for (b) :
Fossils
Anatomy
(c)
Natural selection is when organisms with good (a) live and (b) on their genes and organisms with bad genes (c) out.
The results of natural selection are organisms with (d) for their environment
Organisms with traits, such as being (a) , survive better in their environment than (b) fish.
Over time, only the organisms with the good (c) (in this case fast fish) will survive and the new populations will look (d) than their ancestors
Structures in an organism that evolved from a common ancestor are called (a) structures.
Structures in two organisms that are similar but (b) come from a common ancestor are called structures
There are 2 moths in the picture, through natural selection, which moth has the traits to survive a bird attack?
Black
Moth
White
Moth
List four factors that affect the rate of a reaction.
Temperature
Concentration
Surface area
Volume
Catalysts
What happens to particles when the temperature increases?
They slow down
They move faster
They collide more
They arrange in the right order
How does a catalyst speed up a reaction?
By lowering the activation energy of the reaction
By providing more energy
By making them more available
Why does a higher concentration increase the rate of reaction?
It increases the amount of reactants.
It lowers the activation energy.
It increases the energy of particle collisions.
It increases the frequency of particle collisions.
Why does a higher temperature increase the rate of a reaction?
It increases both the frequency and energy of particle collisions.
It only increases the frequency of particle collisions.
It only increases the energy of particle collisions.
It reduces the activation energy of the reaction.
What is reaction rate?
The change in the quantity of reactants or products per unit time
The energy required to start a reaction
The speed at which a reaction occurs
The concentration of reactants in a reaction
What is activation energy?
The change in the quantity of reactants or products per unit time
The energy required to start a reaction
The speed at which a reaction occurs
The concentration of reactants in a reaction
How does the concentration of reactants affect the rate of a chemical reaction?
Higher concentration of reactants leads to a higher reaction rate
Lower concentration of reactants leads to a higher reaction rate
Concentration of reactants has no effect on the reaction rate
Concentration of reactants affects the reaction rate in an unpredictable manner
How does the state of subdivision of reactants (surface area) affect the rate of a chemical reaction?
Larger surface area of reactants leads to a higher reaction rate
Smaller surface area of reactants leads to a higher reaction rate
Surface area of reactants has no effect on the reaction rate
Surface area of reactants affects the reaction rate in an unpredictable manner
How does a catalyst affect the rate of a chemical reaction?
A catalyst increases the reaction rate
A catalyst decreases the reaction rate
A catalyst has no effect on the reaction rate
A catalyst affects the reaction rate in an unpredictable manner
How does temperature affect the rate of a chemical reaction?
Higher temperature leads to a higher reaction rate
Lower temperature leads to a higher reaction rate
Temperature has no effect on the reaction rate
Temperature affects the reaction rate in an unpredictable manner
How does agitation affect the rate of a chemical reaction?
Increased agitation leads to a higher reaction rate
Decreased agitation leads to a higher reaction rate
Agitation has no effect on the reaction rate
Agitation affects the reaction rate in an unpredictable manner
When we investigate the rate of reaction we are looking at the...
amount of product formed
speed of reaction
concentration of reacting particles
combining reactants with products
Energy stored because of gravity is called:
Gravitational Potential Energy
Kinetic Energy
Mechanical Advantage
Chemical Energy
At which point does the ball has the greatest gravitational potential energy (GPE)?
A
G
D
C
G
Which would have the LEAST gravitational potential energy (GPE)?
A ball sitting on the ground
Moon viewed from the Earth
An airplane flying 30,000 feet above the ground
A rock sitting on top of Mt. Everest
How could you increase the gravitational potential energy of an object without changing its mass and gravity?
Make the object larger
Lower the object towards the ground
Raise the object farther off the ground
Allow the object to roll on the ground
How could you increase the object's gravitational potential energy (GPE) without changing its distance from the ground (height) and gravity?
Decrease the object's mass
Increase the object's height
Increase the object's mass
Decrease the object's height
____________ is the ability to do work.
Energy
Force
Friction
Motion
When you are holding a book, energy is stored between the book and Earth; this type of energy is called ________ potential energy.
Kinetic Energy
Chemical Energy
Gravitational Potential Energy
Electric Energy
Gravitational potential energy depends on the strength of gravity, ________ and ________ of the object.
height and mass
friction and movement
mass and movement
height and friction
You throw a ball into the air as shown in the diagram. At what point does the ball have the most gravitational potential energy?
W
X
Y
Z
At which point on the roller coaster is the gravitational potential energy the greatest?
W
X
Y
Z
Which is the correct unit for expressing gravitational potential energy?
Joule
Newton
m/s2
meter
Which of the following is the correct equation for calculating an object's gravitational potential energy?
PE = mgh
PE = mg / h
PE = mg + h
PE = gh
What is the value of the Earth's acceleration due to gravity (g)?
9.8 m/s2
100 m/s2
25 m/s2
3.14 m/s2
What is the gravitational potential energy (GPE) of a 1 kilogram book that is 1 meter above the ground?
g = 9.8 m/s2
9.8 Joules
1.0 Joule
0.10 Joule
11.8 m/s2
The formula for calculating the gravitational potential energy in an object is shown above. Which object will have the largest value for its GPE
Gravitational Potential Energy (Ep) is...
the energy stored in a stretched object
the energy stored in an electrically charged object
the energy stored in a frozen object
the energy stored in a raised object
To convert grams into kilograms...
multiply the grams by 100
divide the grams by 100
multiply the grams by 1000
divide the grams by 1000
What is the gravitational potential energy of an 85 kg mountain climber at the summit of a 6267 m volcano?
Let g = 9.8N/kg
5,220,411 J
532,695 J
73.7 J
54,356.6 J
What is the gravitational potential energy of a 26 kg eagle, flying at an altitude of 65 m at a speed of 19 m/s?
Let g = 9.8N/kg
32,110 J
1690 J
172.4 J
16,562 J
An Olympic high jumper, with a mass of 82 kg, has a maximum gravitational potential energy of 1970 J. How high was the jump?
Let g = 9.8N/kg
24 m
161,540 m
2.5 m
201 m
The world record for pole vaulting is 6.15 m. I the pole vaulter’s gravitational potential energy is 4942 J, what is his mass?
Let g = 9.8N/kg
803.6 kg
504.3 kg
30,393.3 kg
82 kg
Which 2 items does gravitational pull depend on?
Mass (weight)
Speed
Height / Distance from the ground
Force
True / False: The heavier an object is, the more potential energy the object has.
True
False
Which object has the greatest gravitational potential energy?
Wrecking Ball
Small Car
School Bus
Red Apple
Which object would have the greatest gravitational potential energy when thrown off of the roof of a building?
Apple
Bowling Ball
Pencil
Computer
Which object do you think has the greatest GPE?
whale
car
ball
Which object do you think has the greatest potential energy?
green ball
red ball
blue ball
Which one delivers more of a "punch" if it lands on you? More stored energy, more ability to cause an effect!
green ball
red ball
blue ball
If an object with a GPE of 40 J increased its mass 10 times, how much GPE would the object have now?
4 J
40 J
400 J
If an elevator on the ground lifted to a height 16 times higher how would the GPE be affected?
GPE would increase 16 times
GPE would decrease 16 times
GPE would remain the same
Which of the following is true about gravitational potential energy?
It increases with decreasing height or mass
It decreases with increasing height or mass
It increases with increasing height or mass
It stays the same no matter what the height or mass
How much is the potential energy of a body when it reaches the ground?
Zero
Constant
Bokter
Maximun
gravitational potential energy exist between ___________
all objects with mass
some objects with mass
all objects without mass
when object height increases , gravitational potential energy________
increases
decreases
does not change
when object mass decreases, gravitational potential energy________
increases
decreases
does not change
which skater has more gravitational potential energy?
yellow skater
blue skater
both skaters have equal gravitational potential energy
which skater has more gravitational potential energy?
yellow skater, because of higher height
green skater, because of more mass
yellow skater, because of more mass
green skater, because of height height
what type of potential energy is in the figure?
gravitational potential energy
elastic potential energy
electric potential energy
magnetic potential energy
what type of potential energy is in the figure?
gravitational potential energy
elastic potential energy
electric potential energy
magnetic potential energy
When you eat food, then exercise
the chemical potential energy in food is used
the kinetic energy in the food is used
the potential energy in the food is increased
the magnetic potential energy in food is used
Pair the energy and the example!
Kinetic Energy
People running
Thermal energy
Bonfire
Chemical Energy
Uncooked Rice
Gravitational Potential Energy
people on top of the building
Light Energy
Torch
What kind of energy is being shown in the picture?
Light
Gravitational
Potential
Kinetic
As the ball is dropped, the potential energy decreases while the kinetic energy increases however the amount of energy stays the same.
True
False
Which is the best example of kinetic energy?
A car sitting on top of a hill
A skateboard on the sidewalk
A wagon rolling down a hill
A powerwheel parked in the yard
Before fruit falls from a tree, how does energy flow?
Potential - Kinetic - Sound
Light - Kinetic - Heat
Potential - Sound - Heat
Solar - Kinetic - Heat
A hair dryer goes through three energy transformations. What are they?
electrical
thermal
mechanical
mechanical
thermal
electrical
mechanical
electrical
thermal
thermal
electrical
mechanical
Sound Energy
Mechanical Energy
Thermal (Heat) Energy
Chemical Energy
Pick the BEST Energy Conversion below for a Hydroelectric Dam.
What energy transformation occurs as a mouse produces body heat?
Chemical --> Thermal
Thermal --> Chemical
Electrical --> Thermal
Thermal --> Mechanical
The Law of Conservation of Energy states that energy is never _____________ or ____________, only transformed.
created, destroyed
created, subtracted
added, subtracted
destroyed, subtracted
A skydiver jumps out of a helicopter. What is happening in terms of energy?
He is gaining potential energy as he falls, and losing kinetic energy.
He is gaining kinetic energy as he falls and losing potential energy.
His kinetic and potential energy is always the same.
He is gaining kinetic and potential energy at the same time.
When energy is released, it dissappears.
True
False
Electrical energy is transferred to _____ Energy.
Solar
Thermal
Chemical
Electrical
What energy transformation occurs when an alarm clock rings?
electrical to mechanical, sound
chemical to mechanical,sound
electrical to thermal, chemical
mechanical to mechanical, thermal, sound
What are the energy transformations that occur when a person rides a bike to the top of a hill?
mechanical, thermal,
chemical, mechanical, thermal, electrical
chemical, mechanical, thermal, electrical, radiant
chemical, mechanical, thermal
List the energy transformations of this object.
Electrical → Mechanical/ Radiant Energy
Electrical → Mechanical / Sound / Thermal Energy
Mechanical → Chemical / Thermal energy
Mechanical→ Electrical energy
What energy transformations does fire have?
Thermal→ Sound Energy
Thermal→ Radiant energy
Chemical → Thermal energy
Chemical→ Sound energy
What is the unit for kinetic and potential energy?
Meters
Kilograms
Watts
Joules
How is thermal energy a product when you connect the hair straightener to an electric plug?
When you plug in the hair straightener to electric plug it’s already composed with thermal energy
Hair straighteners don’t have thermal energy
When you plug in the hair straightener to the electric plug it transfers it’s electric energy to thermal energy that you can use to straighten your hair
Hair Straighteners when plugged into an electric plug it turns into mechanical energy
Which sports can't Mr Coumbe play?
Volleybal
Criket
Footy
He's good at all of these cos Mr Coumbe is amazing
