Conduction
Radiation
Convection
Energy
Teachers Choice
100
What is conduction, and how is it transferred?
Conduction is the process that moves energy from one object to another when they are touching. It is transferred through direct contact between objects.
100
What is radiation?
Radiation is the energy that travels across distances in the form of electromagnetic waves.
100
What is convection?
Convection is the transfer of energy through flow of a gas or liquid.
100
In organisms, cells obtain energy by breaking bonds. Breaking bonds releases
Chemical Energy
100
A solid has a definite shape, but not a definite volume b. a definite shape and a definite volume c. a definite volume, but not a definite shape d. neither a definite shape nor a definite volume
B
200
How are conductors and insulators different? Give an example of each.
Conductors are materials that transfer heat easily. Insulators are materials that are poor conductors. Examples of conductors: metal, gold, silver, copper Examples of insulators: wood, plastic, rubber
200
What are three types of radiations?
Visible light, microwaves, infrared radiaion.
200
How is convection different from conduction?
It is different from conduction because convection is the transfer of energy through liquids and gases, while conduction transfer energy through solids.
200
The more particles an object has at a given temperature, a. the higher its temperature. b. the more thermal energy it has. c. the more degrees it has. d. the more kelvins it has.
B
200
Particles of a liquid a. are tightly packed together and stay in a fixed position. b. have no viscosity. c. decrease in volume with increasing temperature. d. are free to move around one another but still touch.
D are free to move around one another but still touch.
300
What is not true about conduction? A) Conduction continues until the temperatures of the objects are the same. B) Conduction transfers heat through solids. C) Conduction still occurs when the objects are the same temperature. D) Conduction can occur within a single object
C) Conduction still occurs when the objects are the same temperature.
300
List a way that you can feel radiation.
300
What are convection currents and how do they flow? Explain the process in which convection occurs.
Convection currents are the pattern of movement that occurs when a gas or liquid rises as it becomes warmer in one area and sinks as it becomes cooler in one area, it flows in a continuous loop. As the air is heated, its molecules begin to spread apart, getting less dense and rising. As the warm air rises into the atmosphere, it begins to cool. When the air is no longer warmer and less dense that the air above it, it will stop rising. The air then begins to cool as it molecules get closer together, the cool air begins to sink when it becomes denser than the warmer air beneath it. The cool air sinks and replaces the warm, rising air.The cooler air is then warmed by conduction with the Earth's surface, rising as well.
300
How does heat transfer from different objects of different temperature?
Heat travels from warmer objects to cooler objects. The molecules of the warmer object vibrate and collide with each other. This collision transfers energy from the warmer object’s molecules to the cooler object’s molecules. Heat stops transferring when both objects are the same temperature
300
What is the unit you measure thermal energy in?
Joules
400
What is an example of conduction occurring in a single object? A) A stove heats a pan. B) The fireplace warms your hand. C) The fish is put inside a tank with the bag still on, so the temperatures can balance. D) You put a metal spoon in a cup of hot chocolate, and the heat travels from one end of the spoon to the other end.
D) You put a metal spoon in a cup of hot chocolate, and the heat travels from one end of the spoon to the other end.
400
Which of the following is not a way that you feel radiation? 1. Putting your hand in a fire 2. Putting your hands near a fire to warm your hands up 3. Lying in the sun to tan 4. Sleeping on a floor heater
Putting your hands in a fire
400
Which of the following is false? A. Convection currents flow in a continuous loop. B.Differences in density in a liquid or a gas can produce convection. C. Warm air is denser than cold air, so the warm air rises and the cool air sinks. D. In convection currents, the warm ground transfers energy to the air by convection.
C. Warm air is denser than cold air, so the warm air rises and the cool air sinks.
400
The law of conservation of energy states that when one form of energy is transformed to another, a. energy is destroyed in the process. b. no energy is destroyed in the process. c. energy is created in the process. d. some amount of energy cannot be accounted for.
B.no energy is destroyed in the process
400
The total energy of all the particles in a substance is called
Thermal Energy
500
Name three ways that conduction helps humans. Answers may vary.
Some examples: Heat from the stove travels to the pan to cook the food. A cup of hot chocolate transfers energy to your hands to keep you warm. The fire from a fireplace warms the air around it.
500
Which of these is not true about radiation? A. Light from a lamp is radiation B.The sun is so huge, that the Earth receives a little more radiation than it needs C. Radiation is energy that travels in the form of electromagnet waves, and can travel through empty spaces, and through objects D. The Earth is so small compared to the sun, and so far away that it receives very little radiation
D. The Earth is so small compared to the sun, and so far away that it receives very little radiation
500
How is convection an important part on Earth and in Earth's atmosphere? Explain in bullet points.
- convection currents continually warm and cool land on Earth - most of the heat in the atmosphere move by convection - convection is one several processes that redistribute energy on Earth
500
No more energy can be removed from matter at this temperature.
O degrees Kelvin absolute zero
500
Which state of matter undergoes changes in volume most easily?
Gas
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