Air pressure decreases as elevation increases. Identify how the boiling point of water on top of a mountain would be different from its boiling point at sea level. Draw two
models to show how the particle motion and the state of water on the mountain top
and at sea level would change if you kept adding thermal energy to water that was
already at 100°C. Label your models to show what happens to the temperature as
the energy is added.
Boiling point
of water: ?
Boiling point
of water: 100°C

Give the biological term for: structures that display characteristics of living organisms only within living cells

When plants use sunlight to make food, the energy of sunlight is

Archeologists have discovered three sites showing conclusive evidence for the mastery of fire in tanzania, from a period slightly after the time that homo habilis was present in africa. these sites clearly were founded by homo erectus, the descendent species of homo habilis that migrated north, out of africa and into asia. homo erectus was known to have mastered fire, from ample evidence at sites in asia. there is no reason to attribute mastery of fire to homo ergaster, the descendent species of homo habilis that remained in africa. which of the following is an assumption on which the argument depends? (a) before their migration, homo erectus occupied african territory as far south as tanzania.(b) the strain of migration provided the selective pressure motivating homo erectus‘ mastery of fire.(c) homo ergaster would not have derived as much benefit from the mastery of fire as did homo erectus.(d) homo ergaster inherited all cultural knowledge from homo habilis, a species that did not have mastery of fire.(e) homo ergaster did not occupy regions as far south as tanzania until well after the time of these three sites.