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WorksheetsBig Ideas 10 and 11 Energy and Energy Transformations
Total questions: 42
Worksheet time: 47mins
What is light?
a form of energy which our sense of touch can detect
a form of energy which our sense of taste can detect
a form of energy which our sense of sight can detect
a form of energy which our sense of hearing can detect
How does light move?
Light travels in a crooked line until it strikes an object or travels from one material to another
Light travels in a curvy line until it strikes an object or travels from one material to another
Light travels in a straight line until it disappears
Light travels in a straight line until it strikes an object or travels from one material to another
When light strikes an object, what THREE things can happen?
The light can be absorbed
The light can get stronger before it disappears
The light can be reflected
The light can be bent (refracted)
The light can be turned to a gas
What happens when light hits a shiny surface, like a mirror?
The light is reflected.
The light is refracted.
The light is absorbed.
The light disappears.
Light reflecting off of objects is what allows us to ______.
taste
hear
see
eat
Why does a pencil appear to bend when it is partially in a glass of water?
Light energy speeds up when it travels from one material to another (air to water), and this shift in speed causes the pencil to appear to bend or break.
Light energy slows down when it travels from one material to another (air to water), and this shift in speed causes the pencil to appear to look all in one piece.
Light energy slows down when it travels from one material to another (air to water), and this shift in speed causes the pencil to appear to bend or break.
Light energy slows down when it travels from one material to another (air to water), and this shift in speed causes the pencil to dissolve in the water.
Why should you wear a white t-shirt outside on a hot, sunny day instead of a black t-shirt? (select the THREE reasons)
A black t-shirt will absorb the Sun’s light and warm you up.
White looks better on most people than black does, and it will not absorb heat.
A white t-shirt will reflect the Sun’s light and keep you warmer.
When light is absorbed by an object, the energy is converted to heat.
A white t-shirt will reflect the Sun’s light and keep you cooler.
Objects that give off light (the Sun, light bulbs, oven coils, fire, etc.) often also give off _____.
heat
gas
crystals
cold
Why does it feel cooler under the shade of an umbrella?
Energy from the Sun can cool objects, but when sunlight is not present, heat may be gained. The umbrella blocks the Sun’s light, so that is why it feels warmer in the shade.
Energy from the Sun can heat objects, but when sunlight is not present, heat may be lost. The umbrella blocks the Sun’s light, so that is why it feels cooler in the shade.
Which form of energy is produced by the movement of molecules?
heat (thermal)
light
sound
The faster the molecules are moving, the more ______ energy an object has.
heat
light
sound
electrical
Heat energy is measured with a ___________________.
graduated cylinder
balance scale
thermometer
ruler
When you rub two objects together, heat energy is produced by _____________.
friction
chance
evaporation
condensation
___________ energy is a form of energy that is stored. Examples are batteries, food, and fuel, like gasoline or coal.
Nuclear
Light
Sound
Mechanical
Chemical
___________ energy is the energy of motion. It is all the energy that an object has because of its motion and its position. This energy is used to do work.
Chemical
Light
Mechanical
Sound
__________ is something that has the ability to cause motion or create change.
Matter
Energy
Friction
Mass
____________ energy is energy produced by vibrations. Its waves must have a material to travel through. They can't move through a vacuum.
Sound
Chemical
Heat
Electrical
________ is the frequency, or speed, of a sound wave. It can be high (fast) or low (slow).
Wave
Tone
Pitch
Sound
How is a low-pitch sound produced?
When an object vibrates slowly (slow frequency), a low pitch is produced.
When an object vibrates quickly (fast frequency), a low pitch is produced.
How is a high-pitch sound produced?
When an object vibrates slowly (slow frequency), high pitch is produced.
When an object vibrates quickly (fast frequency), high pitch is produced.
Which would make a higher-pitch sound: a large drum or a small drum?
small drum
large drum
Which would make a lower-pitch sound: a tight rubber band or a loose rubber band?
loose rubber band
tight rubber band
What common material is a good conductor of both heat and electricity?
wood
cloth
metal
plastic
What are some materials that are not good conductors (insulators)?
Rubber, steel, cloth, wood, and glass
Rubber, plastic, cloth, metal, and glass
Rubber, plastic, copper, wood, and glass
Rubber, plastic, cloth, wood, and glass
When two objects are rubbed together, heat is created by ________________.
friction
static
condensation
evaporation
How can moving water be used as a source of energy?
when water flows, it stores the energy in a battery and converts it to electricity
when water flows, it can turn the turbine of a generator which changes mechanical energy into electrical energy
when water flows, it can turn the turbine of a generator which changes sound energy into electrical energy
when water flows, it can turn the turbine of a generator which changes chemical energy into wind energy
How can wind be used as a source of energy?
when wind blows, it can turn the turbine of a generator which changes the energy of motion into electrical energy.
when wind blows, it can turn the turbine of a generator which changes the energy of motion into sound energy.
when wind blows, it can turn the turbine of a generator which changes the chemical energy into electrical energy.
when wind blows, it can turn the turbine of a generator which changes the sound energy into wind energy.
_________ electricity is the build-up of an electrical charge on the surface of an object. This charge can build up when two objects come into contact. Wearing socks on carpet and then touching a doorknob often results in this.
Wind
Heat
Chemical
Static
Items with _____ charges will attract each other.
different
the same
Items with _____ charges will repel each other.
similar
different
____________ energy is energy that comes from the flow of electric charges through a conductor.
Sound
Heat/Thermal
Electrical
Light
A continuous flow of energy requires a _____ _____, or a complete loop.
closed circuit
open circuit
loose circuit
new circuit
Check all the parts that are necessary to make a closed circuit:
battery (power source)
desk
lightbulb (the load)
wire (a conductor path)
flashlight
Check some possible reasons a bulb won’t light up in a circuit:
It could be an open circuit, meaning the wires are not connected in a continuous loop.
The battery could be dead.
The bulb could be burnt out.
The flow of electricity could be blocked by an insulator.
Each end of the battery is connected to the bulb in a continuous loop and the switch is closed.
Describe the energy transformation in a desk lamp.
electrical → sound and heat
mechanical → light and heat
electrical → light and mechanical
electrical → light and heat
Describe the energy transformation in a blender.
chemical → mechanical and sound
electrical → mechanical and sound
electrical → heat and sound
sound → mechanical and electrical
Which of the following is NOT an example of chemical energy?
A glow stick
A battery
A rock about to fall off a cliff
A burning match
A flashlight can produce _____________when a battery is inside?
chemicals
light
sound
energy
Which is an example of a chemical reaction?
burning wood
stretching a rubberband
holding a ball up high
rolling a car down a ramp
Eating food is an example of chemical energy.
true
false
Which does NOT have chemical energy?
food
battery
the sun
coal
