EduNinjaWhich of the following is a consequence of the adhesive properties of water?
Stable temperatures of aquatic environments
Water movement by capillary action in soil
Transport of dissolved nutrients in blood plasma
Cooling effect of sweating
To investigate the thermal properties of water, students placed hot water in two thin plastic cups and measured their rate of cooling. The sides of one cup were covered with tissue paper soaked in hot water; the other cup was left uncovered. The temperature was recorded with a thermometer every 4 minutes for 20 minutes. The temperature in the laboratory was .
Explain, with reference to the thermal properties of water, how this experiment helps demonstrate how humans respond to overheating.
What property of water leads to aquatic environments having low fluctuations of temperature throughout the year?
High specific heat capacity because covalent bonding restricts molecular motion
Low specific heat capacity because covalent bonding restricts molecular motion
Low specific heat capacity because hydrogen bonding restricts molecular motion
High specific heat capacity because hydrogen bonding restricts molecular motion
Which characteristic of the ringed seal (Pusa hispida) is a consequence of the viscosity of water?
Streamlined body
Sharp teeth
Claws
Lungs
Which symbol indicates the polarity of the oxygen atom in the water molecule?
+
-
What describes bonding within a water molecule?
Hydrogen bonding due to transfer of electrons
Double bonds due to equal sharing of electrons
Non-polar covalent bonding due to equal sharing of electrons
Polar covalent bonding due to unequal sharing of electrons
The photograph shows a pond skater.
Which property of water allows the insect to walk on water?
Adhesion
Capillarity
Surface tension
Transparency
Which characteristic of the ringed seal (Pusa hispida) is a consequence of the thermal conductivity of water?
Streamlined body
Sharp teeth
Blubber (layer of fat)
Lungs
Which planet in the table falls within the "Goldilocks zone" and may be capable of sustaining extraterrestrial life?
Planet
Temperature
Atmosphere
Gravity / g
Kepler-22b
-11 to 16
unknown
2.4
WASP-39b
750
hydrogen, helium and
other elements
25.0
Gliese 876d
50 to 80
high levels of toxic gases
20.0
Kepler-16b
-100
unknown
0.9
Why is sweat a good coolant for the body?
The arterioles that transfer water to sweat move closer to the skin surface when it is hot.
Breaking H bonds between water molecules in sweat requires energy from body heat.
Sweat contains minerals such as sodium chloride.
Sweat is non-polar.