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Science Review - T2 2025
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What kind of circuit is this?
Series circuit
What kind of circuit is this?
Parallel circuit
Magnets have north and south ____________.
poles
What is the center of an atom called?
The nucleus
What is this?
An atom
What does this picture show?
Magnetic field
When two magnets with opposite poles meet, they ______________ eachother.
attract
When two magnets push back from eachother, they ________ because the poles are the same.
repel
A temporary magnet produced by an electric current is called an ________________________.
electromagnet
When you turn on a fan or a toy car that runs on batteries, a machine inside uses electrical energy to make the blades or wheels move. This kind of machine is called an ____________________.
electric motor
What is the name of the special machine that spins and changes motion into electrical energy as a backup source of electricity?
Generator
What is energy from the sun called?
Solar energy
What is heat energy from inside the Earth called?
Geothermal energy
What kind of energy is being used here to make energy?
Hydroelectric energy
Give an example of a fossil fuel.
Coal/oil/natural gas
What two types of energy form mechanical energy?
Potential + Kinetic
What kind of energy is in a battery?
Chemical energy
What is stored “could move” energy called?
Potential energy
What kind of energy does a moving object have?
Kinetic energy
What kind of surface allows us to see a clear image/reflection?
A smooth surface
What is it called when light bounces off a smooth surface?
Reflection
What kind of materials block all light?
Opaque
What is an example of a translucent material?
Wax paper, stained glass, thick plastic
What kind of materials scatter some light and let only part of it through?
Translucent materials
Give two examples of transparent materials.
Glass, water ...
What kind of materials let most light pass through?
Transparent materials
What happens to light that hits an object but is not absorbed?
It bounces off the object.
What happens to the pupil when it is dim (not light)?
It becomes larger.
What happens to the pupil when it is bright?
It becomes smaller.
Why does light bend/refract? It changes _______________.
Light changes speed when it passes from air into water/glass.
What is it called when light bends?
refraction
What is the name for materials that block light and don't allow any of it to come through?
Opaque
What is the name for materials that scatters light and only allows some of it to pass through?
Translucent
What is the name for materials that allow light to pass through it?
Transparent
How can we see objects? What happens to the light?
The light bounces off objects and enters our eyes.
Give an example of where light comes from.
sun, streetlights, cellphones, televisions, lightbulbs ...
Light can travel through ______________.
space
What is light? Light is a form of _______________.
energy
What is F?
optic nerve
What is E?
retina
What is D?
lens
What is C?
iris
What is B?
pupil
What is A?
cornea
Does this soundwave have a high frequency or a low frequency?
low frequency
Does this soundwave have a high frequency or a low frequency?
high frequency
What are the red lines showing?
amplitude
What shows us the pitch of a sound?
 
frequency
 
amplitude
 
wavelength
 
intensity
What type of wave is a sound wave>
longitudinal
How does the brain use sound waves?
It changes the vibrations into signals that are sent to the brain
What unit is used to measure sound?
decibel
What are sound waves?
vibrations that carry sound
What is I?
ear canal
What is H?
ear drum
What is G?
anvil
What is F?
stirrup
What is E?
cochlea
What is D?
hammer
What is C?
inner ear
What is B?
middle ear
What is A?
outer ear
Is this an example of a physical change or chemical change?
chemical change
Is this an example of a physical change or chemical change?
physical change
Is this an example of a physical change or chemical change?
physical change
Is this an example of a physical change or chemical change?
physical change
Is this an example of a physical change or chemical change?
chemical change
Is this an example of a physical change or chemical change?
chemical change
How can you tell if a chemical change has occured?
there might be color change, a different smell, different temperature, there could be gas coming from it ...
What is a compound?
When two or more elements are combined, like 2 hydrogen + 1 oxygen (which is water)
What is a solution?
When things are mixed and cannot be separated. When one substance dissolves in another
What is a mixture?
when things are combined/mixed together but can be separated
How do you calculate density?
density = mass Ă· volume
Does the volume of the water change when you put an object in the water container?
yes
What does this picture show?
volume
What are the red arrows showing?
evaporation
What does this picture show?
deposition (gas to solid)
What does this picture show?
sublimation (solid to gas)
What does this picture show?
boiling point
What does this picture show?
density
What does this picture show?
molecule (or compound)
What does this picture show?
element
What does this picture show?
gas
What does this picture show?
liquid
What does this picture show?
solid
What does this picture show?
 
solution
 
mixture
What does this picture show?
 
mixture
 
solution
A pure substance made of only one type of atom.
element
A mixture where small pieces float around but don’t dissolve, often sinking to the bottom or floating on top.
suspension
When light, sound, or heat passes through a material.
transmission
The distance between two identical points on a wave, like from one peak to the next.
wavelength
The transfer of heat through the movement of liquids or gases, like warm air rising and cool air sinking.
convection
The transfer of heat through empty space in the form of waves, like the warmth you feel from the sun.
radiation
How much matter is packed into a certain amount of space.
density
A material that slows down or stops heat from passing through, like wood or foam.
thermal insulator
A mixture where one thing dissolves completely into another.
solution
A buildup of electric charge on the surface of an object, often caused by rubbing two things together.
static electricity
Anything that has mass and takes up space.
matter
A spiral-shaped part of the inner ear that helps convert sound vibrations into signals the brain can understand.
cochlea
The measure of how loud or how soft a sound is.
intensity
Energy from the sun that can be used to produce heat, light, or electricity.
solar energy
A circuit where all components are connected in a single path, so the same current flows through each one.
series circuit
The bending of light or heat as it passes from one material to another, like when a pencil looks bent in water.
refraction
The measure of how high/how low a sound is.
pitch
Materials that let electric charges (or heat) travel through them easily.
conductors
When light, sound, or heat is taken in by a material.
absorption
A change where a substance turns into a completely new substance, like metal rusting,
chemical change
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