Podcast
Questions and Answers
Position is the location of an object in ______ space.
Position is the location of an object in ______ space.
three-dimensional
Velocity is the ______ and direction of a moving object.
Velocity is the ______ and direction of a moving object.
speed
[Blank] is the force that works against motion.
[Blank] is the force that works against motion.
Friction
When ______ increases, acceleration decreases.
When ______ increases, acceleration decreases.
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Energy is the ability to do ______.
Energy is the ability to do ______.
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Kinetic energy is the energy of ______.
Kinetic energy is the energy of ______.
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We measure temperature with a ______.
We measure temperature with a ______.
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Heat is the flow of ______ energy from one object to another.
Heat is the flow of ______ energy from one object to another.
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A material that transfers heat energy easily is a _______________.
A material that transfers heat energy easily is a _______________.
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Sound travels fastest in a _______________.
Sound travels fastest in a _______________.
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Transparent materials allow light to _______________ through.
Transparent materials allow light to _______________ through.
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The _______________ is when light waves bounce off a surface.
The _______________ is when light waves bounce off a surface.
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Electrical charges can be _______________ or positive.
Electrical charges can be _______________ or positive.
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A circuit is a path where _______________ current flows.
A circuit is a path where _______________ current flows.
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Fuses can only be used _______________ time.
Fuses can only be used _______________ time.
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Materials that do not transfer heat energy easily are _______________.
Materials that do not transfer heat energy easily are _______________.
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Study Notes
Forces and Motion
- Position is the location of an object
- Motion is movement that changes an object's position
- Speed is the distance moved in an amount of time
- Velocity is the speed and direction of a moving object
- Inertia is the tendency of an object in motion to stay in motion or an object at rest to stay at rest
- A force is a push or pull
- Acceleration is a change in speed of an object
- Friction is the force that works against motion
- Gravity is the force that pulls objects down toward Earth
Changing Motion
- Newton is the unit used to measure force
- Balanced forces are forces that are equal in size with opposite directions
- Unbalanced forces are forces that are not equal in size with opposite directions
- When mass increases, acceleration decreases
- When force increases, acceleration increases
Work and Energy
- Work is done when force is used to move an object a distance
- Energy is the ability to do work
- Potential energy is stored energy
- Kinetic energy is the energy of motion (movement)
- Energy can be transferred from one object to another
- Energy can be transformed from one form to another
- Types of energy: chemical, light, thermal, electrical, mechanical, and nuclear
Heat
- Heat is the flow of thermal energy from one object to another
- Temperature measures the thermal energy of the particles in a substance
- Thermometers measure temperature using liquid mercury inside
- Conduction is heat transfer between two objects that are touching
- Convection is heat transfer through liquids or gases
- Radiation is heat transfer through space (no matter is needed)
- Insulators are materials that do not transfer heat energy easily (cotton, plastic)
- Conductors are materials that transfer heat energy easily (metal)
Sound
- Sound travels in solids, liquids, and gases
- Sound cannot travel through outer space since there is no matter in space
- Wavelength is the distance between waves
- Frequency affects pitch
- Amplitude affects volume
- Pitch is the highness or lowness of sound
- Volume is the loudness of a sound
Light
- Light travels in waves
- Transparent materials (glass) allow light to pass through
- Translucent materials scatter light in different directions
- Opaque materials block light completely
- Colors of visible light: ROYGBIV (Red, Orange, Yellow, Green, Blue, Indigo, Violet)
- Red has the longest wavelength, Violet has the shortest wavelength
- Reflection is when light waves bounce off a surface
- Refraction is when light rays bend when moving from one material to another
Electricity
- Electrical charges can be negative or positive
- When a lot of charges build up, it's known as static electricity
- A circuit is a path where electric current flows
- The flow of electrical charges through a circuit is called electric current
- Electrical conductors are the same as heat conductors (metal)
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- and - charges attract each other
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- and - charges repel each other
-
- and + charges repel each other
- Fuses can only be used one time and break the connection when there is too much electricity/heat
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Description
Review key concepts in physics, including position, motion, speed, velocity, inertia, force, acceleration, and friction.
