Lesson 4

Question 1

Structures and Properties of Water

Answer 1

*It has high boiling point and exist as liquid at room temperature
*It has high specific heat which requires large amounts of heat before it vaporizes
*It is the only substance that contracts when copied because of its more open structure in the solid form
*It has high heat of vaporization
*It has a high surface tension

Question 2

How does water molecules disrupt/break the hydrogen bond?

Answer 2

By increasing temperature or hest energy

Question 3

How does the kinetic energy of the molecules increase?

Answer 3

Kinetic energy of the molecules increased by increasing the temperature which to the escape in IMFA

Question 4

Molecules are bound together by hydrogen bonding

Answer 4

It has a high boiling point and exist as liquid at room temperature

Question 5

How does heat energy is distributed in the water molecules?

Answer 5

When the water molecules are heated enough to break its bond, the additional heat energy will be shared to other water molecules and collide to others

Question 6

How does the bond between the water molecules can be renewed?

Answer 6

By lowering the temperature

Question 7

What degrees does ice start to become less dense ?

Answer 7

4 degrees

Question 8

What happened to the water molecules when its cooled?

Answer 8

The water molecules contracts

Question 9

Why does the ice float in water?

Answer 9

Because ice has open structure due to repulsion of negative-charged oxygen atoms

Question 10

Explains why the earth has minimal temperature variations that can affect the climate

Answer 10

It has high specific heat which requires large amounts pf heat before it vaporize

Question 11

When cooled, more molecules are brought closer together and need to be accommodated in a smaller area

Answer 11

It is the only substance that contracts when cooled because of its more open structure in the solid form

Question 12

This causes a large drop in temperature during evaporization

Answer 12

It has high heat of vaporization

Question 13

Without hydrogen bonds, water boils at temp _______ degrees C and Freeze at _______ degrees C

Answer 13

-80, -100

Question 14

Very high quantity of heat energy is need for evaporation. This amount of heat is called _____________________

Answer 14

heat of vaporization

Question 15

A water property that helps to cool down the body of living organism

Answer 15

Evaporation cooling

Question 16

Human heat and vaporize sweat and process of vaporizing, vaporize plant water is called __________

Answer 16

Transpiration

Question 17

How does the body pf the living organism like human and plants cool down?

Answer 17

Water can evaporate, so, for human the body heat is used to vaporized sweat and for plants heat is also used to convert liquid water to water vapor that goes to the atmosphere

Question 18

This allows water to move from the roots to the top of a very tall tree

Answer 18

It has a high surface tension

Question 19

Causes the molecules on the surface to contract and to resist being stretched or broken

Answer 19

Inward net force

Question 20

How does the barrier from the atmosphere and water formed?

Answer 20

The water molecules come in contact with each other that causes for the surface layer to be created