18 Questions
What is the primary reason why wool is a poor conductor of heat?
Because it has air trapped in between the fibres
Which of the following types of heat transfer occurs when a cold steel spoon is dipped in a cup of hot milk?
Conduction
What is the primary reason why dark-coloured objects absorb more heat than light-coloured objects?
Because they have a higher albedo
Which of the following is an example of convection in nature?
Sea breeze
What is the primary mode of heat transfer in liquids and gases?
Convection
Why do light-coloured clothes keep us cooler in the summer?
Because they reflect more light and heat than dark-coloured clothes
What is the primary reason why wearing more layers of clothing during winter keeps us warmer than wearing just one thick piece of clothing?
Because it increases the total thermal insulation
What type of heat transfer does not require a medium?
Radiation
What is the term for the flow of heat from a body at a higher temperature to a body at a lower temperature?
Heat transfer
What is the term for the breeze that blows from the land to the sea?
Land breeze
What is the term for the materials that allow heat to pass through them easily?
Conductors
What is the normal temperature of the human body?
37°C
What is the primary mode of heat transfer near a candle flame?
Convection
Why does the hand above the flame feel hotter than the hand on the side of the flame?
Because of convection currents created by the flame
What is the primary cause of the sea breeze?
Cooler air from the sea moving towards the land
What happens to the land and water during the day in coastal areas?
The land gets hotter than the water
Why are the windows of houses in coastal areas made to face the sea?
To receive the cooler sea breeze
What is the name of the breeze that occurs at night in coastal areas?
Land breeze
Understanding how heat travels through air and the process of convection. Learn about the movement of heat from a heat source and how it affects the surrounding air.
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