$$E = m \times c \times \Delta T$$

Question 1

Which property of water allows it to exist naturally on Earth as a solid, liquid, and gas?

Accepted Answer

Its hydrogen bonding and polar covalent bonds

Question 2

What is the main reason water molecules are able to form hydrogen bonds with each other?

Accepted Answer

Oxygen is highly electronegative, creating polar covalent bonds

Question 3

Which of the following best describes cohesion in water?

Accepted Answer

Hydrogen bonds holding water molecules together

Question 4

Why does water have a high specific heat capacity?

Accepted Answer

Because hydrogen bonds require a lot of energy to break

Question 5

Which emergent property of water is most directly responsible for the ability of plants to transport water from roots to leaves?

Accepted Answer

Cohesive and adhesive behavior

Question 6

A scientist observes that water beads up on a waxy leaf surface. Which property of water is being demonstrated?

Accepted Answer

Cohesion

Question 7

Which of the following statements about hydrogen bonds in water is TRUE?

Accepted Answer

Hydrogen bonds require a lot of energy to break

Question 8

If a cell is placed in a solution and water moves into the cell, which property of water is most relevant to this process?

Accepted Answer

Versatility as a solvent

Question 9

Which of the following best explains why ice floats on liquid water?

Accepted Answer

Hydrogen bonds in ice create a lattice that is less dense than liquid water

Question 10

A drop of water sticks to a glass window. Which property of water is responsible for this phenomenon?

Accepted Answer

Adhesion

Question 11

Which of the following is NOT an emergent property of water that facilitates life?

Accepted Answer

High molecular weight

Question 12

What percentage of the human body is water, according to the study materials?

Accepted Answer

70%

Question 13

Which type of bond connects the hydrogen and oxygen atoms within a single water molecule?

Accepted Answer

Polar covalent bond

Question 14

Why is the shape and charge of the water molecule crucial for life?

Accepted Answer

It enables water to form hydrogen bonds and interact with many substances

Question 15

Which property of water helps maintain stable temperatures in organisms and environments?

Accepted Answer

Ability to moderate temperature due to high specific heat

Question 16

Which of the following best describes adhesion in water?

Accepted Answer

Attraction between water and different substances

Question 17

A plant cell wall attracts water molecules. What is this an example of?

Accepted Answer

Adhesion

Question 18

Which equation best represents the energy required to break hydrogen bonds in water?

Accepted Answer

$$E = m 	imes c 	imes \Delta T$$

Question 19

Which property of water is most important for dissolving salts and sugars in biological systems?

Accepted Answer

Versatility as a solvent due to polarity

Question 20

Which of the following is a direct consequence of water's hydrogen bonding?

Accepted Answer

Water has a high surface tension

Chapter 3: Water & Life – Properties and Importance of Water in Biology

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