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On a very cold day, people can often be seen rubbing their hands together. Why do people do this?
A material through which energy cannot flow easily.
Jill's
This creates friction which produces heat to warm their hands.
winter jacket
It helps keep heat out of the house in the summer and helps keep heat inside the house in the winter.
all of these
heat energy from the Sun
all of these
What is the definition of an insulator?
A material through which energy cannot flow easily.
Jill's
This creates friction which produces heat to warm their hands.
winter jacket
It helps keep heat out of the house in the summer and helps keep heat inside the house in the winter.
all of these
heat energy from the Sun
all of these
Which of the following types of energy can be changed into heat?
A material through which energy cannot flow easily.
Jill's
This creates friction which produces heat to warm their hands.
winter jacket
It helps keep heat out of the house in the summer and helps keep heat inside the house in the winter.
all of these
heat energy from the Sun
all of these
Which of the following is a way to produce heat?
A material through which energy cannot flow easily.
Jill's
This creates friction which produces heat to warm their hands.
winter jacket
It helps keep heat out of the house in the summer and helps keep heat inside the house in the winter.
all of these
heat energy from the Sun
all of these
Insulation is used in many places. It is used in refrigerators and freezers, in the walls of homes, and even in clothing. In which of the following clothing items would insulation be the most useful?
A material through which energy cannot flow easily.
Jill's
This creates friction which produces heat to warm their hands.
winter jacket
It helps keep heat out of the house in the summer and helps keep heat inside the house in the winter.
all of these
heat energy from the Sun
all of these
Jack and Jill poured hot chocolate from the same container into different thermoses. At lunch time, the temperature of Jack's hot chocolate was 80° F. The temperature of Jill's hot chocolate was 85° F. Whose thermos has better insulation?
A material through which energy cannot flow easily.
Jill's
This creates friction which produces heat to warm their hands.
winter jacket
It helps keep heat out of the house in the summer and helps keep heat inside the house in the winter.
all of these
heat energy from the Sun
all of these
Why do people put insulation in the walls and ceilings of their homes?
A material through which energy cannot flow easily.
Jill's
This creates friction which produces heat to warm their hands.
winter jacket
It helps keep heat out of the house in the summer and helps keep heat inside the house in the winter.
all of these
heat energy from the Sun
all of these
What keeps the Earth's oceans from freezing?
A material through which energy cannot flow easily.
Jill's
This creates friction which produces heat to warm their hands.
winter jacket
It helps keep heat out of the house in the summer and helps keep heat inside the house in the winter.
all of these
heat energy from the Sun
all of these
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