Science Review Topic 2: Water & PH Scale

Question 1

That are the 6 MOST common elements in living organisms

Answer 1

Carbon, Nitrogen, Phosphorus, Hydrogen, Oxygen & Sulfur

Question 2

Formula for Water is _____.

Answer 2

H20

H2 stands for 2 Hydrogen Atoms and 1 Oxygen Atom.

H2 stands for 2 Hydrogen Atoms and 1 Oxygen Atom.

Question 3

What is the PH of water? Why?

Answer 3

7 because it is neutral.

7 because it is a neutral solvent & it has nothing in it.

Question 4

Inside of Water Molecules are Oxygen Atoms Positive or Negative.

Answer 4

Slightly Negative

Question 5

Rank the levels of organization from largest to smallest.

Answer 5

Biome->Ecosystem->Community->Population
->Organism->Organ Systems-> Organs->Tissues
->Cells->Molecules->Atoms

Question 6

14 is basic or acidic.

Answer 6

Basic

Question 7

6 is basic or acidic.

Answer 7

Acidic

Question 8

Water Loving is

Answer 8

Hydrophylic

Question 9

Water hating is

Answer 9

Hydrophobic

Question 10

Define a Hydrogen Bond

Answer 10

An attraction between two water molecules.

Question 11

Does Water becomes more or less dense when it freezes?

Answer 11

Less

Question 12

Cohesion is an attraction between

Answer 12

molecules of the same substance

Question 13

Adhesion is an attraction between

Answer 13

other charged materials

Question 14

Hydrogen bonding of water molecules provides cohesion which creates

Answer 14

Surface Tension

Question 15

Cohesion is important to plants because it

Answer 15

Pulls water through them

Question 16

An example of cohesion is

Answer 16

Surface Tension!

Question 17

Do Polar and Non-Polar molecules attract or repel?

Answer 17

Repel

Question 18

Polar molecules are NOT attracted to

Answer 18

any molecules that have a charge

Question 19

High Specific Heat Capacity is

Answer 19

The process of water that tends to input heat and retain it

Question 20

Water can absorb a lot of heat before its _______ changes.

Answer 20

temprature

Question 21

Evaporation increases broken water molecules and it results in

Answer 21

cooling the surface