Water as the Medium of Life

Question 1

Earth is called the BLUE planet because of its water abundance.

Answer 1

TRUE

Question 2

Life is impossible without water. Why?

Answer 2

All life forms depend on
water in various ways such as drinking, irrigation, food preparation, hygiene,
watering plants, and many more.

Question 3

The water environment on Earth is called the?

Answer 3

HYDROSPHERE

Question 4

What are the waters on Earth that comprise the hydrosphere? (3)

Answer 4

(water vapor, liquid water, and ice)

Question 5

What forms are part of the hydrosphere?

Answer 5

all bodies of water such as oceans, lakes, rivers, and marshes. Clouds, snow, glacier, and rain are also part of the hydrosphere.

Question 6

97.5 saltwater + 2.5 freshwater = hydrosphere.

Answer 6

TRUE

Question 7

What are the prevailing hypotheses on the origin of Earth? (2)

Answer 7

Water came from COMETS that collided with Earth

Water was already present within Earth since formation, as volatiles trapped in magma and manifested as liquid water
during DEGASSING AFTER THE CRUST HAD FORMED.

Question 8

Knowing the origin of WATER on Earth is knowing the origin of life on this planet.

Answer 8

TRUE

Question 9

What are the 3 main regions of the Earth?

Answer 9

Lithosphere
Hydrosphere
Atmosphere

Question 10

What is saltwater?

Answer 10

It is composed of a certain amount of salt.

Question 10

Saltwater comprises the ____ and ______

Answer 10

Ocean and Seas.

Question 11

A lot of organisms depend on saltwater for survival such as
saltwater fishes and other marine invertebrates.

Answer 11

TRUE

Question 12

What is freshwater?

Answer 12

Still has small amount of salts but in very low concentrations.

Question 13

Freshwater can be present in the form of ___ and ____, and it can even be found in permanently frozen soil known as ______.

Answer 13

RAIN, SNOW, PERMAFROST

Question 14

Freshwater is commonly stored in rivers, streams, ponds, lakes, marshes, glaciers, and polar caps.

Answer 14

TRUE

Question 15

Only 1% of freshwater is potable. This percentage will be
constant since water is continually recycled through the atmosphere.

Answer 15

TRUE

Question 16

What are the Properties of Water That Enable the Existence of Life? (3)

Answer 16

Density
Transition Temperatures
Heat Capacity

Question 17

Water is densest at?

Answer 17

3.98 degrees celsius

Question 18

Water is least dense at?

Answer 18

FREEZING TEMP

Question 19

The density of water
changes with several factors: ____ and ____

Answer 19

TEMPERATURE AND SALINITY

Question 20

Ice insulates the underlying liquid and prevents the liquid from further freezing.

Answer 20

TRUE

Question 21

If ice sinks when frozen, then the surface of the liquid water will freeze and sink again until such a point that all water will be frozen, making chemical reactions impossible.

Answer 21

TRUE

Question 22

The consistency of water in maintaining liquid form at ROOM TEMPERATURE is important as it allows the ____ and ____ of substances from the cell to its environment and vice versa.

Answer 22

FLOW AND TRANSFER

Question 23

All life forms are composed of cells in which their cell
membrane SEPARATES them from the environment.

Answer 23

TRUE

Question 24

Water has the ability to control temperature. It is the CONTROL CENTER

Answer 24

TRUE

Question 25

The ANIMAL cell has a cell membrane

The PLANT cell has a cell wall

Answer 25

TRUE

Question 26

Water is an excellent coolant since its high amount of heat energy can be absorbed without getting too hot.

Answer 26

TRUE

Question 27

The water’s high heat capacity is important because, without this property, the atmosphere will be EXTREMELY COLD during winter and EXTREMELY HOT during summer.

Answer 27

TRUE

Question 28

If water doesn’t have a ________, our temperature can get too high quickly which can be highly detrimental to most organisms.

Answer 28

HIGH HEAT CAPACITY

Question 29

It is believed and discovered that water from the comet had the same _____________ as the water in the seas.

Answer 29

ISOTOPIC COMPOSITIONS