Question

snow and ice are most likely to undergo temperatures, and dry winds.

1. what conditions are needed for snow to undergo sublimation?

a. intense sunlight
b. very cold temperatures
c. dry winds
d. all of the above

1. whenever water ice gains heat, it undergoes sublimation.

a. true
b. false

1. sublimation is an example of a change of state.

a. true
b. false

1. after a substance sublimates, its particles have less energy.

a. true
b. false

Explanation:

Question 7

Sublimation of snow (solid to gas) requires conditions that promote the phase change. Intense sunlight provides energy, very cold temperatures keep it from melting (so it can sublimate), and dry winds reduce humidity, all facilitating sublimation. So all options (a, b, c) contribute, making d correct.

When water ice gains heat, it can melt (to liquid) or sublimate (to gas), but "whenever" it gains heat, it doesn't always sublimate (it may melt instead). So the statement is false.

Sublimation is the change of state from solid directly to gas (e.g., snow to water vapor), so it is a change of state. Thus the statement is true.

Answer:

d. all of the above

Question 8