Questions and answers from chapter 10, lessons one and two

Question Answer
how could snow disappear without making a puddle? sublimation!
does a gas gain heat when it condenses? no – condensation comes with cooling
what might happen if there were no spaces between sections of a sidewalk? the sidewalk would break from thermal expansion and contraction
the temperature at which a substance melts is called its __________ melting point
why wouldn't turning up the heat on the stove make boiling water cook things faster? because liquid water can't get hotter than it is when it's boiling!
what kind of mixture is dusty air? it's a suspension
what might happen if you mixed two suspensions? you might get four layers!
how can you tell muddy water isn't a colloid? because the dirt eventually settles to the bottom
why might fish not get enough oxygen in hot water? because hot water can't hold as much dissolved oxygen as cold water
if two liquids boil at about the same temperature, would it be easy to separate them by distillation? no, because it would be too easy to boil them both away at the same time!
a solution of metal is called an ___________ alloy
a solution of sugar in water has a solubility limit. Do heterogenous mixtures have solubility limits? nope- you can just make that mixture more chunky – like Ben & Jerry's Ice Cream!
How can matter change state? by gaining or losing energy!
what happens to the temperature when matter is changing state? the temperature stays the same