Your fingerprints are caused by A build-up of melanin
layers of keratin
a layer of dermal papillae
blood vessels near your skin

Which best explains how a heat pump can heat a room? cold air from the house is moved through pipes, where it absorbs thermal energy. warm air from outside is pushed into the house to replace the cold air. combustion warms the air when chemical energy is transferred to thermal energy. fuel is used to move a piston, which pushes warm air into the house.

Did you know that a single bee would have to go to over 2 million flowers to make a single pound of honey?

Why do mountaineers become breathless as they reach high altitudes