Water A1.1.1-1.1.4

Quiz
•
Biology
•
12th Grade
•
Hard

Carolyn Hudson
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What did Charles Darwin suggest about the origin of the first organisms in 1871?
They appeared in the oceans.
They appeared in a "warm little pond".
They appeared in the atmosphere.
They appeared on land.
Answer explanation
In 1871, Charles Darwin proposed that the first organisms originated in a "warm little pond". This idea suggests a specific environment conducive to the emergence of life, distinguishing it from other options like oceans or land.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Where do most current hypotheses suggest the first cells originated?
In the atmosphere
On land
In the oceans
In a "warm little pond"
Answer explanation
Most current hypotheses suggest that the first cells originated in the oceans, where conditions were suitable for the formation of organic molecules and early life forms, making it the most widely accepted theory.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the significance of water in the formation of the first cells?
It provided a solid environment for reactions.
It allowed substances to dissolve and react.
It was not involved in the formation of cells.
It acted as a barrier to chemical reactions.
Answer explanation
Water is crucial for the formation of the first cells as it allows substances to dissolve and react, facilitating the necessary chemical processes for life. Without water, these reactions would be limited.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What type of bonds are present between oxygen and hydrogen atoms in a water molecule?
Ionic bonds
Non-polar covalent bonds
Polar covalent bonds
Metallic bonds
Answer explanation
In a water molecule, the bonds between oxygen and hydrogen atoms are polar covalent bonds. This occurs because oxygen is more electronegative than hydrogen, causing an unequal sharing of electrons and creating a dipole moment.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why are the covalent bonds in water molecules considered polar?
Because hydrogen is more attractive to electrons than oxygen.
Because oxygen is more attractive to electrons than hydrogen.
Because electrons are shared equally.
Because they are ionic bonds.
Answer explanation
The covalent bonds in water are polar because oxygen is more electronegative than hydrogen, meaning it attracts electrons more strongly. This creates a partial negative charge on oxygen and a partial positive charge on hydrogen.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the result of the unequal sharing of electrons in water molecules?
The hydrogen atoms have a partial negative charge.
The oxygen atom has a partial positive charge.
The hydrogen atoms have a partial positive charge.
The oxygen atom has a full negative charge.
Answer explanation
In water molecules, oxygen is more electronegative than hydrogen, causing the electrons to be drawn closer to oxygen. This results in hydrogen atoms having a partial positive charge, making the correct answer the third choice.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the role of water in the processes of life?
It prevents molecules from interacting.
It allows molecules to move and interact.
It acts as a solid barrier.
It is not involved in life processes.
Answer explanation
Water is essential for life as it facilitates the movement and interaction of molecules, enabling biochemical reactions necessary for living organisms. Without water, these processes would be severely hindered.
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