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Oceans
Unit D Chapter 2
29
Science
4th Grade
12/06/2010

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Term
The --- --- is the natural recycling of water.  It is made up of water vapor, clouds, rain and the ocean (and other natural water storage areas)
Definition
water cycle
Term
--- is the process that changes a liquid into a gas.
Definition
Evaporation
Term
--- is the process that changes a gas to a liquid.
Definition
Condensation
Term
--- is any form of water that falls from clouds (rain, sleet, snow, hail). 
Definition
Precipitation
Term
This is was occurs when the water droplets become too heavy to stay in the air.
Definition
Precipitation falls from the clouds.
Term
A --- is the up-and-down motion of water caused by wind.
Definition
wave
Term
A --- --- is a large wave caued by strong, gusty winds.
Definition
storm surge
Term
--- are daily changes in the ocean level caused by the gravitational pull of the sun, moon, and Earth.
Definition
Tides
Term
Neap and spring are two types of ---.
Definition
tides
Term
A --- --- is like a river of water in the ocean caused by blowing winds.
Definition
surface current
Term
A --- ---- ---- is a current that forms when cold water meets warmer  ocean water, or when very salty water meets less salty ocean water.
Definition
deep ocean current
Term
The --- --- is the place where land and oceans meet.  Many important resources are harvested from this area.
Definition
shore zone
Term
The --- --- is the gently sloping part of the ocean floor near the shore.
Definition
continental shelf
Term
The --- --- is a big, flat area of the ocean floor that is covered with a thick layer of sediments.
Definition
abyssal plain
Term
A --- is a deep valley or canyon formed when two of Earth's ocean plates collide.
Definition
trench
Term
The --- ----  is the longest chain of mountains of Earth.  They stretch through the Atlantic, Pacific, and Indian Oceans.
Definition
mid-ocean ridge
Term
Why are waves bigger in large bodies of water (i.e. ocean) than they are in smaller bodies of water (i.e. lake)?
Definition
Waves are bigger in large bodies of water than they are in smaller bodies of water because the wind blows over a larger area of water.  Wave size depends on the surface area of the water, the strength of the wind, and how long the wind blows.
Term
What is the difference between a wave and a surface current?
Definition
A wave is an up and down motion of water. A surface current is like a river flowing in the ocean.
Term
Why are currents always present in the ocean?
Definition
Currents and density are constantly changed by the sun and precipitation.
Term
Describe a hurricane that hits a shoreline.
Definition
The winds would be strong and gusty.  There would be a storm surge.  Storm surges waves caused by stong and gusty winds.
Term
The pull of the --- gravity has the greatest effect on changing tides.
Definition
moon's
Term
-- and --- of the affect the density of deep-ocean currents.
Definition
temperature and salinity
Term
What three things affect the height of a wave?
Definition

1.  strength of the wind

2.  amount of time the wind blows

3.  size of area over which the wind blows

Term
Waves move in a/an --- motion
Definition
up-and-down
Term
Beaches get smaller because --- carries sand and sediment away from the shore.
Definition
erosion
Term
Beaches get larger because --- deposits sand and sediment.
Definition
deposition
Term
Why is the gravitational force of the moon on Earth's oceans stronger than the Sun?
Definition
the moon's is closer to Earth than than sun
Term
What would form a trench?
Definition
An ocean trench may form when one of Earth's plates slides beneath another plate.
Term

The area of the ocean that is richest in resources is

--- ---.

Definition
shore zone
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