Podcast
Questions and Answers
Gas has a definite volume.
Gas has a definite volume.
False (B)
A liquid will take the shape of its container.
A liquid will take the shape of its container.
True (A)
Heat can move from a cooler place to a hotter place.
Heat can move from a cooler place to a hotter place.
False (B)
The freezing point of water is $100$ degrees Celsius.
The freezing point of water is $100$ degrees Celsius.
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Evaporation is the process of a gas changing to a liquid.
Evaporation is the process of a gas changing to a liquid.
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A force is a measure of how an object changes its position.
A force is a measure of how an object changes its position.
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A solid has a definite volume and a definite shape.
A solid has a definite volume and a definite shape.
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The third law of motion describes the relationship between an object's mass and its acceleration.
The third law of motion describes the relationship between an object's mass and its acceleration.
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The distance between one point on a compression and the corresponding point on the next compression in a sound wave is called a rarefaction.
The distance between one point on a compression and the corresponding point on the next compression in a sound wave is called a rarefaction.
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If two forces act on an object in the same direction, the net force is the difference of the two forces.
If two forces act on an object in the same direction, the net force is the difference of the two forces.
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The symbol shown below could be used to represent a single cell in a circuit schematic.Single Cell
The symbol shown below could be used to represent a single cell in a circuit schematic.Single Cell
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A wet shirt is put on a clothesline to dry on a sunny day. The shirt dries because water molecules lose heat energy and evaporate.
A wet shirt is put on a clothesline to dry on a sunny day. The shirt dries because water molecules lose heat energy and evaporate.
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A fixed pulley changes the direction of the input force.
A fixed pulley changes the direction of the input force.
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The energy of matter in motion is potential energy.
The energy of matter in motion is potential energy.
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Liquids form into no shape.
Liquids form into no shape.
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The acceleration of an object is directly proportional to the force acting on it and inversely proportional to its mass. Which law matches the description? Newton's 2nd Law of Motion.
The acceleration of an object is directly proportional to the force acting on it and inversely proportional to its mass. Which law matches the description? Newton's 2nd Law of Motion.
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A place or object to determine if an object is in motion is a reference point.
A place or object to determine if an object is in motion is a reference point.
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Vaporization that takes place inside a liquid is called evaporation.
Vaporization that takes place inside a liquid is called evaporation.
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Flashcards
Newton's 2nd Law of Motion
Newton's 2nd Law of Motion
The acceleration of an object is directly proportional to the force acting on it and inversely proportional to its mass.
Potential Energy
Potential Energy
Energy that is stored due to an object's position or configuration.
Conduction
Conduction
Transfer of thermal energy through direct contact between materials.
Translucent
Translucent
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Net Force
Net Force
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Hertz
Hertz
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Boiling
Boiling
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Reference Point
Reference Point
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Mechanical Wave
Mechanical Wave
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Evaporation
Evaporation
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Gas
Gas
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Thermal energy movement
Thermal energy movement
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Characteristics of liquids
Characteristics of liquids
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Speed vs. Velocity
Speed vs. Velocity
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Force
Force
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Sublimation
Sublimation
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Newton's first law
Newton's first law
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Weight
Weight
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Study Notes
Grade 8 Matter
- Gas: Has no definite shape or volume.
- Liquid: Takes the shape of its container, has no definite shape, but does have a definite volume. Molecules are loosely packed in comparison to solids.
- Water Vaporization: Evaporation or boiling is the process by which liquid water becomes water vapor (gas).
- Water Freezing/Melting: Freezing is the process by which liquid water converts to ice (solid), and melting is the opposite change from ice to liquid water.
- Matter: Composed of particles.
- Phases of Matter: Solid, liquid, gas. Not Solution.
Grade 8 Heat Transfer
- Heat Transfer: Thermal energy always moves from a higher temperature to a lower temperature.
- Examples of Heat Transfer: Conduction (touching), convection (movement of fluids), radiation (through space).
- Burning Hand: Conduction.
Grade 8 Forces and Motion
- Speed: How fast an object is moving, regardless of direction.
- Force: A push or pull, capable of changing motion. It is an interaction between two or more objects. Forces cause motion, start stationary objects moving, stop moving objects and are interactions between two or more objects.
- Net Force: The sum of all forces acting on an object.
- Newton's First Law: If the net force on an object is zero, the object will remain at rest or move in a straight line with constant speed.
- Newton's Second Law: The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.
- Newton's Third Law: When one object exerts a force on another, the second object exerts an equal and opposite force on the first.
- Weight: A measure of the gravitational force on an object.
- Reference Point: A place or object used to determine if an object is in motion.
- Constant Speed: Maintains a constant velocity.
- Acceleration: Change in velocity
Grade 8 Waves and Sound
- Wavelength: The distance between one point on a compression and the corresponding point on the next compression in a sound wave.
- Frequency and Wavelength: If the frequency of a wave decreases, its wavelength increases (and vice-versa).
- Wave types: Transverse (water waves) and longitudinal.
Grade 8 Simple Machines
- Fixed Pulley: Changes the direction of the input force.
- Wheel and Axle: A simple machine.
- Second-Class Lever: A simple machine. Examples include wheelbarrow, nutcracker.
Grade 8 Energy and Momentum
- Potential Energy: Stored energy.
- Kinetic Energy: Energy of matter in motion.
- Heat energy: Transformation during motion.
- Law of Conservation of Energy: Energy cannot be created or destroyed, only transformed.
Grade 8 Magnetism and Electricity
- Circuit: A path for electricity.
- Single cell: Parts of circuits such as components.
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Description
This quiz covers essential concepts from Grade 8 Science, focusing on the properties of matter, the mechanisms of heat transfer, and the basics of forces and motion. Students will explore different phases of matter, understand how heat transfers between objects, and learn about speed and force. Perfect for reinforcing key scientific principles and preparing for examinations.
