Scientists consider glass an amorphous substance. this means it is not truly a solid or a liquid. it exists in a state somewhere in between. though the molecules that make up glass have a messy arrangement, they still manage to bond together and become stiff. glass reaches this state once it has cooled after introduction to intense heat. in fact, the opposite is also true. introducing a piece of glass to extreme heat can return it to a liquid form.

although glass is thought of as "stiff," it actually exists in a state that is between a solid and a liquid. which could result in changing glass to a liquid state ?

D) heating a window pane to an extremely high temperature

Explanation:

The missing options are:

A) having a volcano erupt near a highway  

B) breaking glass into finely crushed pieces  

C) lightning striking the roof of your house  

D) heating a window pane to an extremely high temperature

In the text it is mentioned that: "Introducing a piece of glass to extreme heat can return it to a liquid form". Then, option D is the correct one. The other options will break the piece of glass, conserving its solid state.

1. read the following excerpt from franklin d. roosevelt's "fireside chat 19":

on the other side of the picture, we must learn also to know that guerilla warfare against the germans in, let us say serbia or norway, us; that a successful russian offensive against the germans us; and that british successes on land or sea in any part of the world strengthen our hands.

remember always that germany and italy, regardless of any formal declaration of war, consider themselves at war with the united states at this moment just as much as they consider themselves at war with britain or russia. and germany puts all the other republics of the americas into the same category of enemies. the people of our sister republics of this hemisphere can be honored by that fact.  

the true goal we seek is far above and beyond the ugly field of battle. when we resort to force, as now we must, we are determined that this force shall be directed toward ultimate good as well as against immediate evil. we americans are not destroyers — we are builders.

analyze the effectiveness of this excerpt. how does it function within the speech as a whole? how does the structure of the excerpt to convey the speech's purpose and key points? support your argument with evidence from the speech. (10 points)