Gr7 - Heat Transfer Quiz
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Questions and Answers

Which of the following substances will melt easily when heated?

  • Wood
  • Ice (correct)
  • Plastic
  • Steel

What is meant by a substance 'melting'?

  • Changing from solid to liquid state (correct)
  • Changing from gas to liquid state
  • Changing from solid to gas state
  • Changing from liquid to solid state

How do the particles in a solid behave?

  • They move around randomly at high speeds
  • They have large spaces between them
  • They move freely and are not tightly packed
  • They are tightly packed and vibrate in fixed positions (correct)

Why are the particles in a liquid able to move about more freely?

<p>They move freely and are not tightly packed (A)</p> Signup and view all the answers

Why does a metal spoon left in a hot saucepan become hot but a wooden one does not?

<p>Metal conducts heat better than wood (B)</p> Signup and view all the answers

Which of the following appliances is NOT mentioned as a heat energy transfer device?

<p>Microwave (D)</p> Signup and view all the answers

In which grade level was the concept of heat energy transformation covered?

<p>Grade 6 (D)</p> Signup and view all the answers

Heat energy always travels from a ________ object to a ________ one.

<p>hotter, colder (D)</p> Signup and view all the answers

What happens to the phase of a substance when heat is removed from a liquid?

<p>It turns into a solid (A)</p> Signup and view all the answers

What is thermal equilibrium?

<p>The point at which two objects reach an equal temperature (D)</p> Signup and view all the answers

Which of the following is an example of conduction?

<p>A metal spoon becoming hot when placed in a cup of hot soup (C)</p> Signup and view all the answers

What is an insulator?

<p>A material that does not conduct heat well (A)</p> Signup and view all the answers

How does heat energy transfer occur between a metal pot and a stove?

<p>By conduction (A)</p> Signup and view all the answers

What happens to an object when heat is transferred out of it?

<p>The object becomes cooled (D)</p> Signup and view all the answers

What are the three ways in which heat energy is transferred?

<p>Conduction, convection, radiation (B)</p> Signup and view all the answers

In which scenario does heat energy transfer occur through convection?

<p>The transfer of heat through the movement of fluid (C)</p> Signup and view all the answers

What happens to the temperature of two objects at thermal equilibrium?

<p>They reach an equal temperature (C)</p> Signup and view all the answers

What is the process of heat transfer through electromagnetic waves called?

<p>Radiation (C)</p> Signup and view all the answers

What is the process of heat transfer through direct physical contact between solid objects called?

<p>Conduction (D)</p> Signup and view all the answers

When heat energy is transferred between two objects at different temperatures, what is the point at which they reach an equal temperature called?

<p>Thermal equilibrium (C)</p> Signup and view all the answers

In which way does heat energy transfer occur when an ice block is put into a glass of warm water?

<p>From the ice to the water (A)</p> Signup and view all the answers

What is a material that does not conduct heat well called?

<p>Insulator (C)</p> Signup and view all the answers

What is the transfer of heat energy between solid objects that are in direct physical contact with each other?

<p>Conduction (C)</p> Signup and view all the answers

What is the point at which two objects, which started with different temperatures, reach an equal temperature?

<p>Thermal equilibrium (B)</p> Signup and view all the answers

What is the most common way heat energy is transferred in a metal pot heated on a stove?

<p>Conduction (C)</p> Signup and view all the answers

What happens to the temperature of an object when heat is transferred out of it?

<p>The object becomes cooled (B)</p> Signup and view all the answers

What is the transfer of heat energy through electromagnetic waves called?

<p>Radiation (B)</p> Signup and view all the answers

Which of the following substances will melt easily when heated?

<p>Ice (A)</p> Signup and view all the answers

What is meant by a substance 'melting'?

<p>Changing from a solid to a liquid state (A)</p> Signup and view all the answers

How do the particles in a solid behave?

<p>They are closely packed and vibrate in fixed positions (C)</p> Signup and view all the answers

Why are the particles in a liquid able to move about more freely?

<p>They have higher energy (A)</p> Signup and view all the answers

Why does a metal spoon left in a hot saucepan become hot but a wooden one does not?

<p>Metal conducts heat better than wood (A)</p> Signup and view all the answers

What happens to the phase of a substance when heat is removed from a liquid?

<p>It freezes (A)</p> Signup and view all the answers

Heat energy always travels from a ________ object to a ________ one.

<p>Hotter, cooler (A)</p> Signup and view all the answers

Which of the following appliances is NOT mentioned as a heat energy transfer device?

<p>Refrigerator (D)</p> Signup and view all the answers

In which grade level was the concept of heat energy transformation covered?

<p>Grade 6 (B)</p> Signup and view all the answers
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