MOLECULES OF LIFE

What type of bonding is responsible for the unique properties of water?

• Hydrogen bonding

• Covalent bonding

• Metallic bonding

• Ionic bonding

Answer explanation

Hydrogen bonding is responsible for the unique properties of water, such as high surface tension, cohesion, and adhesion.

What property of water allows insects to walk on its surface?

• Surface adhesion

• Surface tension

• Water tension

• Liquid cohesion

Answer explanation

Surface tension is the property of water that allows insects to walk on its surface by creating a thin film that can support their weight.

At what temperature does water freeze at sea level?

• 10 degrees Celsius

• 100 degrees Celsius

• 50 degrees Fahrenheit

• 0 degrees Celsius or 32 degrees Fahrenheit

How many hydrogen bonds can a water molecule form?

• 8

• 6

• 4

• 2

What role does water play in moderating Earth's temperature?

• Water moderates Earth's temperature by absorbing and releasing heat due to its high specific heat capacity.

• Water moderates Earth's temperature by causing extreme temperature fluctuations.

• Water moderates Earth's temperature by increasing the greenhouse effect.

• Water moderates Earth's temperature by blocking sunlight from reaching the surface.

Which type of carbohydrate is this?

• monsaccharide
• disaccharide
• polysaccharide
• glyceride

Which type of carbohydrate is this?

• monosaccharide
• disaccharide
• polysaccharide
• glyceride

This polysaccharide is important to the structure of plant cell walls, 

• Starch
• Glycogen
• Cellulose
• Chitin

What type of carbohydrate is this?

• polysaccharide
• disaccharide
• monosaccharide
• it isn't a carbohydrate

The 3 categories of carbohydrates are:

• Monosaccharide, disaccharide, polysaccharide
• glucose, fructose, galatose
• starch, cellulose, chitin
• There are no categories of carbohydrates