Gases

Living things use oxygen for the process of

• Respiration

• Hearing

• Digestion

• Walking

Tags

NGSS.HS-LS1-7

NGSS.HS-LS2-5

If temperature is held constant, what is the relationship between the pressure and volume of gases?

• directly proportional

• indirectly proportional

• inversely proportional

What specific phase of matter has no fixed shape and volume?

• Solid

• Liquid

• Gas

• Plasma

Tags

NGSS.MS-PS1-4

Based on the Kinetic Molecular Theory, gases are composed of molecule. The following statements are TRUE regarding the molecules of gases, EXCEPT:

• The distances from one molecule to another molecule are far greater than the molecules’ dimension

• The molecules of gases are always in constant random motion

• The gas molecules have weak intermolecular forces in between them

• Temperature has small effect on the movement of gas molecules

Tags

NGSS.HS-PS3-4

Gases have the tendency to occupy all the spaces of the container that they are confined. The amount of space occupied by the gases is called ______.

• pressure

• volume

• temperature

• mass

Mika can still pump air in her purple balloon even though it is already inflated. What explains this phenomenon?

• balloon looks better if it is bigger

• balloon are slightly elastic

• the molecules of gas inside a balloon is highly compressible

• the gas molecules in a balloon have high pressure

Tags

NGSS.HS-PS3-2

If the pressure of gases inside a non-rigid tank doubles, what will happen to its volume?

• it will reduce by half

• it will double

• it will be the same as the amount of pressure

• it will triple

According to Charles Law, the temperature and volume of gas molecules are directly proportional to each other if the pressure and the number of moles of gases are held constant. Below are the real-life applications or examples of Charles Law, EXCEPT:

• hot air balloon

• breathing

• tire explosion during summer

• baking bread

What will happen to the gas pressure as the temperature increases, if the amount and volume of the gas are kept constant?

• the gas pressure remains the same

• the gas pressure decreases

• the gas pressure increases

• there is no significant effect

A rigid tank at 30 degree Celsius contains gas molecules with a pressure of 760 mmHg. Considering that the tank is placed in an open field directly hit by the sun's rays, what will happen to its pressure?

• equal to 760 mmHg

• lower than 760 mmHg

• higher than 760 mmHg

Tags

NGSS.HS-PS3-4