Convection

Where do convection cycles happen on Earth (select ALL that apply)?

• atmosphere

• mantle

• ocean

• rocks

Tags

NGSS.MS-ESS2-6

NGSS.MS-ESS2-5

NGSS.MS-ESS2-4

The density of a substance depends upon the

(a)   (or amount) of the substance and ​the ​ (b)   (or the amount of space it takes up).

• type of material
• mass
• temperature
• volume

Which picture shows material that is more dense?

• The picture of the left

• The picture on the right

Why does ice float?

• Convection currents in the liquid water push the ice up.

• It has more pressure because it is cold.

• It is less dense than liquid water even though it is a frozen solid.

• It is colder so the particles are more compacted which makes it float.

Can convection currents occur in a solid?

• No, because the particles are too close together and can't flow

• Yes, because the particles are moving whether it is a solid, liquid, or a gas.

• No, because the particles are too spread out to make a current

• Yes, because the particles are wiggling and can slide past each other

Which of the following are examples of convection currents (select all that apply)?

• Winds blow from a cold air mass towards a warm air mass

• The sun's rays warm up your face on a sunny day.

• An iron skillet gets hot from being on a gas stove.

• Air is warmed to make a hot air balloon rise.

Tags

NGSS.MS-ESS2-6

What is the definition of convection?

• When heat transfers through waves.

• When heat transfers from objects that are touching.

• When heat transfers through a fluid.

• Heat traveling through EM waves.

Winds are produced by differences in ​air pressure. As sunlight warms up the land, the air over that area becomes​ (a)   dense and the air​ (b)   . This creates and area of ​ (c)   pressure. Wind is then created when the air moves from an area of​ (d)   pressure into an area of​ (e)   pressure. (Some terms may be used more than once.)

• less
• rises
• low
• more
• sinks
• high

Tags

NGSS.MS-ESS2-6

NGSS.MS-ESS2-5

In a convection current, the particles in warm fluids will first​​ (a)   , then become​ (b)   dense, and eventually (c)   .

• expand
• less
• rise
• compact
• more
• sink

Tags

NGSS.MS-ESS2-6

NGSS.MS-ESS2-5

The particles in a fluid will move faster when (select all that apply):

• They are hot

• They are cold

• There is more pressure

• There is less pressure

• There is salt dissolved in the liquid

Tags

NGSS.MS-PS1-4