Kudzu, a plant brought to the US from Japan, is a strong plant that grows rapidly and
native to the US.
A does not compete with plants
B. competes with plants
C. doesn't affect plants
D. helps plants

c. heat could easily travel through the molecules in the air and escape/enter the flask. removing the air slows down the heat transfer.  

why is arctic sea ice important? arctic sea ice keeps the polar regions cool and moderate global climate. sea ice has a bright surface; 80 percent of the sunlight that strikes it is reflected back into space. as sea ice melts in the summer, it exposes the dark ocean surface.