Gases

Water vapor is a greenhouse gas

• True

• False

Tags

NGSS.MS-ESS2-4

Some greenhouse gases are naturally present in the Earth's atmosphere

• True

• False

Over the past 200 years, the level of carbon dioxide in the atmosphere has

• decreased slightly.   

• increased until recently, and then decreased.

• increased steadily.   

• stayed about the same.

Tags

NGSS.MS-ESS3-5

The main human activity that releases greenhouse gases is...

• using bottled water

• burning fossil fuels

• texting on cellphones

• eating meat

Tags

NGSS.MS-ESS2-6

How is a gas defined?

• no shape, no volume

• Definite shape, definite volume

• Found in stars

• Definite volume, no shape

Gases have ...

• Definite shape and definite volume.

• No definite shape and no definite volume.

• Definite volume but no definite shape.

Tags

NGSS.MS-PS1-4

What increases when you compress a gas
(a)  

• pressure

• time

• condensation

• vapor

Answer explanation

Pressure is greatly increased when you compress a gas!!

Tags

NGSS.MS-PS1-4

A gas's molecules _______________

• do not move

• move in place

• flow around each other

• move away from each other

Tags

NGSS.MS-PS3-1

This is a transparent gas with a melting point of -219 ^oC and a boiling point of -183 ^oC. It does not conduct electricity and hence it is a ​ (a)   . It is essential for respiration in most living things and in burning. It is ​ (b)   .

• non-metal

• oxygen

• metal

• helium

• nitrogen

• carbon dioxide

Tags

NGSS.MS-PS1-4

This is an unreactive gas with a melting point of -272 ^oC and a boiling point of -269 ^oC. It does not conduct electricity and so it is a ​ (a)   . It is very light. It is used in airships and inflate balloons. It is ​ (b)  

• non-metal

• helium

• metal

• nitrogen

• hydrogen