Unit 2: Water Properties Flashcards Preview

Copy - Biology 1446 > Unit 2: Water Properties > Flashcards

Flashcards in Unit 2: Water Properties Deck (21):
1

makes up 70 –95% of the organisms body for all life forms on earth.

Water

2

Where is water mainly found?

Inside cells

3

Water is a _______ Molecule (has a positive and a negative end)

polar

4

Oxygen has a slightly ________ charge because it is more electronegative (it has a stronger hold on the electrons because it has eight positive protons).

negative

5

Hydrogen has a slightly _______ charge because it is less electronegative (it has a weaker hold on the electrons because it only has one positive proton).

positive

6

Water’s polarity allows for it to make ________ bonds easily.

hydrogen

7

Polarity makes it possible to conduct __________ very well. (Remember, _________ is flowing electrons.)

electricity

8

The polarity allows for a single water molecule to bind to ___ other water molecules at a time.

4

9

refers to water molecules binding to other water molecules.

cohesion

10

These properties is made possible because of Hydrogen bonds. (3)

cohesion, adhesion, and surface tension

11

This is important in how water moves up a plant.

cohesion

12

refers to water molecules binding to something other than water molecules.

adhesion

13

the linking together of water molecules on the surface of a body of water.

surface tension

14

Water helps with _________ regulation in organisms and on the earth.

temperature

15

the only substance on earth to be found in all 3 states naturally. (solid, liquid, and gas)

water

16

can act as a huge heat “piggy” bank. (made possible by hydrogen bonds)

Water

17

It takes tremendous amounts of ______ to break all four hydrogen bonds at once and turn liquid water to a gas.

energy

18

This measurement is the total amount of kinetic E in a substance.

heat

19

This measurement is the intensity of all the heat in a substance as the molecules move. (The faster they move… the hot it gets and the slower they move… the colder it gets.)

temperature

20

Putting heat E into water, causing the water to evaporate and carry the heat E away from the body thus providing a cooling of the organism to occur as the E leaves.

evaporative cooling

21

Water ________ when it freezes

expands