Heat that flows by conduction is the transfer of thermal energy between substances in contact. for this to happen, what must occur?

a) the two systems must be the same temperature.
b) the two systems must not be touching each another.
c) one system must have higher kinetic energy than the other system.
d) the thermal energy of one system must be the same as the thermal energy of the other system.

Babies with very low or very high birth weight are less likely to survive. observe a graph of the data. % babies born at different weights % babies born in that category 6.0 6.5 in 50-555 70-75 80-8511 100-1055 which statement is a valid claim that could be made using the data in the graph? directional selection is occurring because the graph favors an extreme. mark this and retum save and exit next submit o type here to search