You have a plastic cup full of water - about 200 ml. a) What is its mass?
b) What will happen to the mass if you double the volume of water? How can you do it in
real life?
c) What if you have 1/3 of the volume? How can you do it in real life?
d) You have 20 full glasses and 1 glass half full. What are the volume and the mass of
water?
e) What is the density of the material inside the full cups? Inside a cup half full? What did
you assume to be true when you answered the question?

Isobars are lines of constant or equal pressure on a weather map. they can be used to find areas of low or high pressure over a broad area, and they can tell us how intense the system may be. on weather maps, you may have noticed areas that have a large l or h over a region with lines circling around them. the l stands for low pressure and h stands for high pressure. the lines circling them are isobars. check out the pressure system and isobars over georgia and florida. what is the present weather in this area ? a) clear and sunny b) cold and cloudy c) changing weather d) lots of precipitation