2B. Soil and Properties of Water

What is the uppermost layer of soil, # 1 on the diagram, consisting of an organic layer made up of partially decayed plant and animal debris?

• A

• B

• O

• R

Tags

NGSS.MS-ESS2-2

What word describes when water is attracted to other substances?

• cohesion
• adhesion
• capillary action
• surface tension

Tags

NGSS.MS-ESS2-4

Why does ice float?

• water expands when it freezes, making ice less dense than water

• hydrogen bonds in water push the ice to the surface

• As water freezes, air gets trapped making it more dense

• As water freezes, it takes up more oxygen from the atmosphere, causing it to be more dense

Why does water move from the roots to the leaves of plants?

• Water is pushed by solutes

• Capillary action pulls the water molecules up like a chain

• Water is pulled by gravity

• Water cannot move up roots to leaves

Tags

NGSS.MS-LS2-1

A paperclip floating on water is an example of what property of water?

• capillary action

• surface tension

• universal solvent

• specific heat index

Which of the following is an example of cohesion?

• water sticking to water

• water sticking to glass

• oil sticking to plastic

• hydrogen sticking to oxygen

Water is polar. What does that mean?

• it is a molecule with opposite charges on opposite ends

• it is a molecule with no charge

• it is a molecule with identical charges on opposite ends

• it is a molecule with too many protons

Water striders can walk across the surface of calm water. Their feet push the surface of the water down slightly, but they do not break the surface. Why?

• The insects are small enough to see the individual water molecules, so they are able to step carefully from one molecule to the next

• The insect’s feet are non-polar, so they are repelled by the polar water molecules and are pushed away from the water’s surface.

• The insects are light enough so they do not break the hydrogen bonds holding the water molecules together

• The insects actually use their wings to hover slightly above the water’s surface and they only skim it with their feet.

New soil deposition seals off the ends of a river and the cut-off becomes a(n) ________________ that will eventually dry up.

• Oxbow Lake

• Kidney scar

• Flood Plain

• Meander

What is a thermocline?

• A rapid change in temperature with depth

• A rapid change in temperature with latitude

• A rapid change in salinity with depth

• A rapid change in density with depth