Chem Of Life

Question 1

Water

Answer 1

molecule made of 2 atoms of hydrogen covalently bonded to 1 atom of oxygen

Question 2

Polar molecule

Answer 2

Unequal distribution of charges
- One side is more positive
- One side is more negative
- Dissolves
in water
- Ex: Water

Question 3

Polar molecule

Answer 3

Unequal distribution of charges
- One side is more positive
- One side is more negative
- Dissolves
in water
- Ex: Water

Question 4

Nonpolar molecule

Answer 4

no Seperation of charge, so no
positive or negative poles are formed
- Does not
dissolve in water
- Ex: COz, 02, lipids

Question 5

Periods tell u

Answer 5

How many energy levels an atom has

Question 6

Groups tell u

Answer 6

How many valence electrons and atom has

Question 7

Water molecule interactions

Answer 7

Polar water molecules can be attraded
to each other
- The partially positive hydrogen atom is attracted to the partially negative oxygen atom of a DIFFERENT water molecule

Question 8

A hydrogen bond

Answer 8

• The partially positive hydrogen atom is attracted to the partially negative oxygen atom of a DIFFERENT water molecule

Question 9

Stronger covalent bonds…

Answer 9

Holds the water molecules internally

Question 10

Weaker hydrogen bonds…

Answer 10

Hold different water molecules externally

Question 11

Cohesion

Answer 11

The Attraction between molecules of the same substance
- Water sticking to water
- Tendency of molecules of the SAME
“kind” to stick together
- Causes High surface tension
- Measure of how difficult it is to Stretch or break the surface of a liquid/resist an external force

Question 12

Adhesion

Answer 12

the type of attraction that happens between two diffefent
molecules
- Forms
- Glass, soil, plant tissue, cotton, etc.
Stronger bonds than cohesion
- Example:
- Meniscus forming on graduated cylinder
- Capillary action, seen in ACtion , trees and with straws too!

Question 13

High specific heat

Answer 13

The Temperature of water does not change easily
- Water has to absorb more heat energy to increase overall temperature compared to other compounds
- This helps to regulate Cell
- Its temperature does NOT
temperatures in organisms
fluctuate very much → allows life to live in Water

Question 14

Less dense as a solid

Answer 14

Solid water (ice) is less dense than liquid water → it floats
in liquid water
- Since ice floats in water → Life can exist under frozen surfaces of lakes/polar seas

Question 15

Water is a terrific solvent

Answer 15

• Water’s polarity makes it really good at dissolving things, and thus it is considered the universa
  solvent - it dissolves more substances
  than any other liquid!

Question 16

Solvent

Answer 16

• does the dissolving

Question 17

Solute

Answer 17

What gets dissolved

Question 18

Solution

Answer 18

Uniform mixture

Question 19

Hydrophilic

Answer 19

• Has an affinity for
  Water
• Water “ Loving”
• Usually disselves
  easily in water
• Example: salt and sugar

Question 20

Hydrophobic

Answer 20

• Does not for water
• Water “Fearing
• Does NoT easily in water
• Example: oil
  have an affinity
  dissolve

Question 21

Six elements nessary for life

Answer 21

C-n-p-s-o-h

Question 22

3 examples of what the six elements nessasary for life are in

Answer 22

Carbohydrates- lipids-proteins

Question 23

Levels of organization that makes up an organization

Answer 23

2- Atom (oxygen) - element (02) -Cell(blood Cels)-tissue (epithelaltissue).
Organ (lungs) = Organ System (respiatorn).
-Daganis Homo Sapions)

Question 24

Levels of organism

Answer 24

Atom
Element
Cell
Tissue
Organ
Organ system
Organism