All flashcards
Flashcard 1: Which option describes sound as an energy transfer: vibration traveling in matter or light traveling in space?
Answer: Vibration traveling in matter. Sound waves are mechanical vibrations that need a medium to travel through.
Flashcard 2: What is the main evidence that light is transferring energy to an object?
Answer: The object changes, such as warming or powering a device. Light carries energy that can heat objects or power devices.
Flashcard 3: What observation shows sound energy making something move besides the source?
Answer: Nearby objects vibrate, such as rice on a speaker. Sound waves carry energy that can cause other objects to move.
Flashcard 4: Identify the observation that shows sound energy transfer: a drumhead moving or a drumhead staying still.
Answer: A drumhead moving (vibrating). Vibrating objects create sound waves that transfer energy.
Flashcard 5: What is energy transfer in science (in one short definition)?
Answer: Energy transfer is energy moving from one place or object to another. Energy moves between locations or objects, not created or destroyed.
Flashcard 6: Which energy transfer type is shown when a phone rings: sound, light, heat, or electric current?
Answer: Sound. Phones convert electrical energy to sound energy when ringing.
Flashcard 7: Which observation best shows light energy transfer: a solar calculator turning on or a rock staying unchanged in shade?
Answer: A solar calculator turning on. Solar cells convert light energy into electrical energy.
Flashcard 8: Which heat transfer is shown when warm air rises from a heater: conduction, convection, or radiation?
Answer: Convection. Warm air is less dense and rises, creating convection currents.
Flashcard 9: What is radiation (heat transfer) in one short definition?
Answer: Radiation is heat transfer by waves, without needing direct contact. Electromagnetic waves carry heat energy through empty space.
Flashcard 10: What is conduction (heat transfer) in one short definition?
Answer: Conduction is heat transfer through direct contact. Objects must touch for heat to transfer by conduction.
Flashcard 11: Identify the heat transfer observation: a metal spoon in hot soup becomes warm or becomes colder.
Answer: The metal spoon becomes warm. Heat transfers from hot soup to cooler spoon by conduction.
Flashcard 12: Which direction does heat energy transfer move: from warmer to cooler or from cooler to warmer?
Answer: From warmer to cooler. Heat always flows from higher to lower temperature.
Flashcard 13: What is heat energy transfer (thermal energy transfer) in one sentence?
Answer: Heat transfer is thermal energy moving from warmer to cooler objects. Thermal energy naturally flows from hot to cold objects.
Flashcard 14: What is convection (heat transfer) in one short definition?
Answer: Convection is heat transfer by moving fluids (liquids or gases). Warm fluids rise and cool fluids sink, creating circulation.
Flashcard 15: Identify the observation that shows light energy transfer to heat: black paper warming in sunlight or cooling in sunlight.
Answer: Black paper warming in sunlight. Dark colors absorb more light energy, converting it to heat.
Flashcard 16: Which energy transfer type is shown when a lamp shines on a book: sound, light, heat, or electric current?
Answer: Light. Lamps convert electrical energy into light energy.
Flashcard 17: Which heat transfer is shown when you feel the Sun warming your skin: conduction, convection, or radiation?
Answer: Radiation. The Sun's heat reaches Earth through electromagnetic waves.
Flashcard 18: What is electric current (in one short definition) as an energy transfer?
Answer: Electric current is the flow of electric charge through a circuit. Moving charges carry electrical energy through conductors.
Flashcard 19: Which observation shows heat energy transfer by radiation?
Answer: You feel warmth from the Sun or a fire without touching it. Electromagnetic waves carry heat energy without needing matter.
Flashcard 20: What is radiation as a way heat energy can transfer?
Answer: Heat transfer by waves that can travel through space. Unlike conduction and convection, radiation needs no medium.
Flashcard 21: Which type of energy transfer happens when a battery powers a flashlight bulb?
Answer: Electric current transfers energy through the circuit. Moving electrons carry energy from battery to bulb.
Flashcard 22: Which observation best shows electric current is transferring energy to a device?
Answer: The device works (for example, a bulb lights or a motor spins). Electric energy converts to other forms when powering devices.
Flashcard 23: What must be true for electric current to flow and transfer energy in a simple circuit?
Answer: The circuit must be closed (a complete loop). Electrons need a complete path to flow and carry energy.
Flashcard 24: Identify the energy transfer: A bell rings when a button is pressed; what transfers energy to your ears?
Answer: Sound energy transfers from the bell to your ears. Vibrations from the bell travel as sound waves through air.
Flashcard 25: Which energy transfer is shown when a toaster heats bread after being plugged in?
Answer: Electric current transfers energy that becomes heat in the toaster. Electricity converts to thermal energy in the heating elements.
Flashcard 26: What is energy transfer in science?
Answer: Energy transfer is energy moving from one object or place to another. Energy moves between objects or locations, not created or destroyed.
Flashcard 27: Which type of energy transfer happens when you hear a sound from a speaker?
Answer: Sound energy transfer. Sound waves carry energy from the speaker through air to your ears.
Flashcard 28: Which observation best shows sound energy is being transferred to your ear?
Answer: You can hear the sound (your eardrum vibrates). Sound waves cause your eardrum to move, proving energy arrived.
Flashcard 29: What causes sound energy to transfer through air?
Answer: Vibrations that travel as waves through the air. Sound is mechanical energy that needs matter to travel through.
Flashcard 30: Which type of energy transfer happens when sunlight warms your skin?
Answer: Light energy transfer (radiant energy). Electromagnetic waves carry energy that converts to heat on contact.