What normally describes what happens when you decrease the temperature of water?
A) The molecules start to vibrate and move farther apart, increasing the density.
B) The molecules start to vibrate and move closer together, increasing the density.
C) The molecular vibrations start to slow and the molecules move farther apart, decreasing the density.
D) The molecular vibrations start to slow and the molecules move closer together, increasing the density.
E) none of the above
Question 2
Evidence for the existence of neutrons did not come until many years after the discoveries of the electron and the proton. Give a possible explanation.
A) The neutron is nearly massless.
B) The neutron is only slightly more massive than the proton.
C) The discovery required the use of ultrafast computers.
D) The neutron lacks an electrical charge.
Upward transport of water in xylem.
Spanish Water Dog
The hypothalamus helps regulate body temperature.
Homeostasis is analogous to regulation of temperature via a thermostat.
Lakes and standing water
A Well of Sources for Bottled Water