All the ways scientists do investigations

Which object forms when a supergiant runs out of fuel? a red giant a black hole a white dwarf a neutron star

Which samples do the atoms have the least kinetic energy

According to the passage, which of these is true about gray water systems? a) gray water systems use plants that require less water. eliminate b) gray water systems require the use of less fossil fuels. c) gray water systems reduce the amount of fresh water used. d) gray water systems reduce the amount water used by shower heads.