Properties of Water

Describe the connection between hydrogen and oxygen in one water molecule

• Ionic Bond

• covalent bond

• hydrogen bond

• van der Waals forces

Where is the majority of the negative charge on the water?

• the oxygen

• each hydrogen

• shared evenly across the whole molecule

• the carbon

What atom do the shaded grey circles represent?

• water

• oxygen

• hydrogen

• lithium

What atom do the white circles represent?

• water

• oxygen

• hydrogen

• lithium

What do the solid black lines represent?

• covalent bonds

• hydrogen bonds

• ionic bonds

• chemical bonds

What do the dotted lines represent?

• covalent bonds

• hydrogen bonds

• ionic bonds

• chemical bonds

Based on the diagram, how many hydrogen bonds can one water molecule form?

• 2

• 3

• 4

• 5

Why does ice float on liquid water?

• Molecules in a liquid move faster so hydrogen bonds are constantly breaking and reforming as molecules glide over each other

• Molecules in solid water are packed tightly together in a crystal structure

• Molecules in solid water optimize the number of hydrogen bonds that can form, this makes them space out more than in liquid water

• air gets trapped in the spaces between the water molecules when it freezes, making the solid lighter than the liquid

How does water get from the roots to the leaves of a plant?

• water molecules stick to themselves and the walls of the roots, and they climb over each other

• part of the plant produces a pumping force that moves water up into the leaves

• sugar flows down from the leaves to the roots due to gravity, which pushes up on the water

• water dissolves into the cells of the roots and then the cells are transported up to the leaves

Which of these definitions is correct?

• Cohesion - attraction of water molecules to other water molecules

• Adhesion - ability of water to add more atoms of hydrogen

• Capillary Action - the crawling of caterpillars

• Ionic Bond - chemical bond formed when two atoms share a single electron