Convection

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Science

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8th Grade

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Medium

Oladipupo Abdullah

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6 Slides • 23 Questions

Convection

1. Students will understand how heat is transferred through convection.

2. Students will understand how heat is transferred through convection current in the Earth's Atmosphere

Open Ended

How does convection heat water in a kettle?

Type response here

Multiple Choice

A hot rock is dropped into a pail of cool water. Heat energy transferred from the rock to the water by

Boiling

Evaporation

Conduction

Radiation

Multiple Choice

Warm air rises and the cool air sinks demonstrates this type of heat transfer.

conduction

convection

radiation

Insolation

Multiple Choice

Which is an example of heat being transferred by conduction?

a furnace heating the air in a school

an ice cube melting in a person’s hand

a pot of water on a stove boiling

the sun heating water in a swimming pool

Multiple Choice

Jordan places a hot spoon into a container of ice cream. How does this help him scoop out the ice cream?

The coolness from the ice cream is conducted to the spoon making it easier to scoop out.

The coolness from the ice cream is radiated to the spoon making it easier to scoop out.

The warmth of the spoon is conducted to the ice cream making it easier to scoop out.

The warmth of the spoon is radiated to the ice cream making it easier to scoop out.

Multiple Choice

Conduction

Radiation

Convection

Multiple Choice

Convection

Radiation

Conduction

Multiple Choice

Convection

Conduction

Radiation

Multiple Choice

Conduction

Convection

Radiation

Multiple Choice

Carole owns a two story house with a heating and cooling unit on each floor. In the winter she mostly uses the downstairs unit because the volume of warm air __________ and __________ warming the whole house through __________.

expands, rises, convection

expands, sinks, conduction

contracts, rises, conversion

contracts, sinks, contraption

Multiple Choice

Warm air is __________ dense than cold air and rises creating convection currents.

less

Multiple Choice

How is heat transferred when boiling a pot of water on the stove?

conduction

convection

combustion

radiation

Multiple Choice

During convection, more dense currents _________ and less dense currents _________.

sink, rise

rise, sink

Multiple Choice

In an ocean, warm water moves __________ and cold water moves ____________.

Down, Up

Up, Down

Multiple Choice

Heat transfers from an area of ____temperature to an area of ___ temperature.

high to low

low to high

high to high

It can travel high to low and low to high.

Multiple Choice

In convection, WARM air

Rises

Sinks

Multiple Choice

At the seashore late in the afternoon on a hot day, a person often feels a strong breeze coming from the ocean because...

the pounding waves generate air currents

warm air over the ocean rushes in to replace the cool air that rises over the land

the heavy, cool air over the ocean rushes in to replace the warm air that rises over the land

there are no clouds to block the wind coming in from the ocean

Multiple Choice

Some dye in a beaker of water is gently heated. Why are the streaks of dye seen in the water?

The hot dye is a better conductor than the cool water.

The hot dye is a better convector than the cool water.

The hot water is less dense than the cool water.

The hot water is denser than the cool water.

Multiple Choice

In the process of convection, energy is transferred _________.

because of temperature differences in a solid

because of density differences in a liquid

by the diffusion of molecules throughout a fluid

by the vibration of molecules

Multiple Choice

Which is the best position to place the heating element in an electric heater?

Multiple Choice

Which of the following is an application of convection?

The movement of heat through a metal pan to the food.

The use of ice box to keep drinks cool.

The sea breeze that blows from sea to land.

The use of wool blanket to keep the body warm.

Multiple Choice

Convection can take place in ____________.

solids only.

liquids only.

liguids and gases only.

solids, liquids and gases.

Multiple Choice

The diagram shows some rice being boiled in a pan. What is the main methods by which thermal energy is transferred (i) through the metal pan and

(ii) through the water?

(i) conduction (ii) conduction

(i) convection (ii) convection

(i) conduction (ii) convection

(i) convection (ii) conduction

Convection

1. Students will understand how heat is transferred through convection.

2. Students will understand how heat is transferred through convection current in the Earth's Atmosphere

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