Exploring the Biological Properties of Water

What makes water a polar molecule?

• The high specific heat capacity

• The arrangement of electrons causing a slight charge

• The equal sharing of electrons between hydrogen and oxygen

• The presence of hydrogen bonds

What is the significance of hydrogen bonds in water?

• They make water a non-polar molecule

• They are strong bonds that never break

• They make water compressible

• They give water unique properties essential for life

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Why is water considered a fantastic solvent for chemical reactions?

• Because it is non-polar

• Because it has a high specific heat capacity

• Because many substances dissolve in it

• Because it is incompressible

What does high specific heat capacity of water imply?

• Water requires a lot of energy to change temperature

• Water heats up and cools down quickly

• Water is easily compressible

• Water is a poor solvent

What causes surface tension in water?

• The hydrogen bonding at the surface

• The density of water

• The incompressibility of water

• The high specific heat capacity

How do pond skaters utilize water's surface tension?

• By dissolving in water

• By compressing the water

• By skimming around on the surface

• By diving deep into the water

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What is meant by water's incompressibility?

• Water is a poor solvent

• Water has a high specific heat capacity

• Water cannot be compressed

• Water can be easily compressed

How do spiders use water's incompressibility?

• For heating up quickly

• For floating on water

• For hydraulic mechanisms in their legs

• For dissolving food

What happens to water's density as it cools below 4°C?

• It becomes incompressible

• It remains the same

• It becomes less dense and floats

• It becomes more dense and sinks

Why is the floating of ice beneficial for aquatic organisms?

• It makes the water warmer

• It provides a habitat on top and maintains liquid water below

• It makes the water more compressible

• It increases the water's specific heat capacity