Question

unit 1: instructional sequence 1
draw a water molecule and explain how waters polarity and hydrogen bonding impact its special properties.
one inorganic compound, water, has unique chemical properties that make life on earth possible. why do we look for water on other planets?
how do the properties of water make it essential for life on earth?
describe the scientific explanations of the origin of life on earth:
a. describe scientific explanations of the origin of life on earth:
b. identify situations or conditions contributing to the origin of life on earth:
summarize the properties of water and analyze how these properties make water essential for life on earth:

• polarity

a. water sticks to water because of hydrogen bonds

• cohesion

b. water sticks to other things due to hydrogen bonds

• adhesion

c. unequal sharing of electrons, which causes water to have a slight charge

• universal solvent

d. the heat required to raise the temperature of water

• temperature modification

e. dissolves more substances than any other solvent

• expansion upon freezing

f. ice floats on water

Explanation:

1. Polarity: C. Unequal sharing of electrons causes water to have a slight charge. This is the definition of polarity in a water - molecule where oxygen is more electronegative than hydrogen, leading to an uneven distribution of electrons and a partial negative charge on oxygen and partial positive charges on hydrogen.
2. Cohesion: A. Water sticks to water because of hydrogen bonds. Cohesion is the property of like - substances sticking together, and in water, hydrogen bonds between water molecules are responsible for this.
3. Adhesion: B. Water sticks to other things due to hydrogen bonds. Adhesion is the attraction between different substances, and hydrogen bonds allow water to adhere to other polar or charged substances.
4. Universal solvent: E. Dissolves more substances than any other solvent. Water's polarity and ability to form hydrogen bonds make it an excellent solvent for many ionic and polar compounds.
5. Temperature modification: D. The heat required to raise the temperature of water. Water has a high specific heat capacity, meaning it can absorb a large amount of heat energy without a large increase in temperature, which helps moderate temperatures on Earth.
6. Expansion upon freezing: F. Ice floats on water. When water freezes, it expands and becomes less dense than liquid water because of the formation of a crystalline lattice structure held together by hydrogen bonds, causing ice to float on the surface of liquid water.

Answer:

Polarity - C
Cohesion - A
Adhesion - B
Universal solvent - E
Temperature modification - D
Expansion upon freezing - F