Study

Thermal Energy Review

  •   0%
  •  0     0     0

      Back   Restart
  • One example of radiation is when –
    Any answer that shows the transfer of energy by electromagnetic rays which may occur in empty space.
  • True or False: Heat flows from warmer objects to cooler objects until both reach the same temperature.
    True
  • If two objects are made of the same material, are the same temperature but different sizes (large and small) what object will have greater thermal energy?
    The larger object
  • When you touch a metal spoon in a pot of hot soup, why does the spoon feel hot?
    Heat is transferred from the soup to the spoon through conduction.
  • What is convection?
    Transfer of heat through the movement of fluids (liquids and gases).
  • Regarding thermal energy, the faster the tiny particles of matter move, the colder the matter becomes. (True or False)
    False
  • The transfer of thermal energy that occurs in solids, liquids and gases when two substances of different temperatures touch.
    conduction
  • Balloon 1 and Balloon 2 are filled with the same amount of air. The air in Balloon 1 is cooled so that it is at a lower temperature than the air in Balloon 2. The air in which of these balloons has less thermal energy?
    The air in balloon 1 has less thermal energy
  • When a solid begins to melt, are its molecules moving faster or slower?
    Faster. (The solid molecules are gaining a lot of kinetic energy)
  • When you boil water on the stove, the water moves in a circular pattern as it heats up. It's traveling in a current.
    Convection.
  • You accidentally touch a hot stove burner and immediately pull your hand away
    Conduction.
  • You step out of a swimming pool on a hot day, and the ground feels warm on your bare feet
    Conduction.
  • The transfer of thermal energy from one place to another by the movement of fluids, which occurs on a large scale in atmospheric gases, occeans and earth’s mantle.
    convection
  • While roasting marshmallows the wire handle becomes hot. This is an example of -
    Conduction
  • What is radiation?
    Transfer of heat through electromagnetic waves.
  • What happens to energy when molecules collide?
    Energy transfers from the molecule with more energy to the molecule with less energy
  • You pick up a hot mug of coffee, and the heat travels to your hand
    Conduction.
  • When you sit near a window on a cold day, the glass feels cold to the touch
    Conduction.
  • What will happen to a cup of iced water if it's left at room temperature?
    It will warm up to room temperature because of thermal equilibrium
  • You are holding an ice cube and it melts in your hand. What type of heat transfer is occurring?
    Conduction.
  • Warm and cold water circulating in a pot on the stove is an example of -
    convection
  • You feel heat from a light bulb when you place your hand close to it
    Radiation.
  • Hot air rising and cold air sinking is an example of -
    convection
  • Over time, what cup will loose thermal energy to the air around it? Why?
    Cup 1 because it is a higher temperature than the air in the room. Thermal energy flows from areas of high temperature to low temperature
  • Heat from a radiator moves around the room and warms the air
    Convection.
  • If you place a hot cup of coffee on a table, what will eventually happen to the temperature of the coffee?
    The coffee will cool down until it reaches thermal equilibrium with the surrounding air.
  • Potatoes that are boiled in water receive thermal energy through –
    Convection
  • Over time, what cup will gain thermal energy from the air around it?
    Cup 2 because it is a lower temperature than the air in the room. Thermal energy flows from areas of high temperature to areas of low temperature.
  • You touch the handle of a hot iron, and your hand feels the heat immediately
    Conduction.
  • The total kinetic energy of tiny particles that make up matter is –
    thermal energy
  • The energy transferred between two objects of different temperatures.
    heat
  • How does the Sun transfer heat to the Earth?
    Through radiation.
  • The water in a swimming pool is warmer near the surface and much cooler near the bottom. What type of thermal transfer is this?
    convection
  • Which travels by radiation: heat from the Sun, heat through a metal rod, or heat through boiling water?
    Heat from the Sun.
  • When lying on the sand at the beach, your body feels warm as heat transfers from the sand to you
    Conduction.
  • True or False: Temperature is the average speed of an objects molecules
    True
  • The average kinetic energy of all the particles in a material, measured by a thermometer in degrees.
    temperature
  • What type of current creates a cyclical motion that occurs because the density of a fluid is related to its temperature, causing sinking and rising of the fluid, creating a circular pattern..
    convection curent
  • The Sun warms a rock in the park. This is an example of what heat transfer?
    Radiation.
  • You feel the warmth from the Sun on your skin during a sunny day
    Radiation.
  • Give an example of conduction.
    Any answer that shows the transfer of heat by direct contact.
  • The metal buckle on a seatbelt becomes hot after being in the sun all day
    Radiation.
  • True or False: Heat transfer happens when some energy moves from one object to another object.
    True
  • What is conduction?
    Transfer of heat through direct contact between particles.
  • You feel heat from a space heater across the room without directly touching it
    Radiation.
  • Conduction between two objects can only occur when –
    both objects are in physical contact with each other
  • A transfer of heat occurs while ironing a shirt. This is what type of thermal heat transfer?
    Conduction
  • Sunlight warming a room is an example of
    radiation
  • Warm air from a heater rises to the ceiling, while cooler air sinks to the floor
    Convection.
  • What law states that energy can neither be created nor destroyed, energy just changes form?
    the law of conservation of energy
  • One example of convection is:
    Will vary.
  • What is thermal equilibrium?
    The state in which two objects in contact with each other reach the same temperature and heat transfer stops.
  • Over time, these two cups will both be the same temperature as the room. What is it called when all of the molecules will be moving at the same speed?
    Equilibrium
  • A cool breeze forms when the warm air from the ground rises and cooler air moves in to take its place
    Convection.
  • Beach sand being warmed by the sun is an example of heat transfer through -
    Radiation
  • When an object's molecules slow down, what happens to the temperature of that object?
    The temperature of the object will decrease
  • Heat energy is transferred to a beaker of water on a heated hot plate by –
    Conduction
  • The transfer of heat energy from a campfire to a camper warming their hands, is an example of -
    radiation
  • You place your hand near a campfire and feel the heat without touching the flames
    Radiation.
  • The transfer of energy by electromagnetic rays which may occur in empty space.
    radiation
  • A metal spoon getting hot in a pan on the stove is an example of -
    conduction
  • The three ways to transfer heat energy -
    conduction, radiation and convection
  • True or False: As the temperature of an object increases, its thermal energy also increases
    True
  • A metal spoon is left in a pot of hot soup, and the handle becomes warm
    Conduction.
  • True or False: Thermal energy is the total amount of kinetic energy in an object's molecules
    True
  • True or False: The faster particles move in matter, the cooler the matter is.
    False
  • Why can you feel the heat from a campfire even if you're not touching it?
    Heat is transferred through radiation.
    • Your experience on this site will be improved by allowing cookies.