Sea Week Scavenger Hunt

Name: Indi
Questions Worksheet
WALT: Understand Earth systems
Sea week-
Context: Moon, tides, ocean currents.
Fact Card#1: How does water move on the surface of the ocean? The water in the ocean is constantly moving. On the surface, water moves in the form of waves.
Fact Card#2: How does water move below the surface of the ocean? The water in the ocean is constantly moving. Below the surface, the water moves in great currents.
Fact Card #3: What are the two types of ocean currents? There are two types of currents: Surface currents and deep currents.
Fact Card #4: Define ocean currents. Ocean currents are moving streams of water within the ocean.

 Fact Card #5: Define the ‘surface current’. Currents that move on or near the surface of the ocean is called a surface current.
Fact Card #6: List the factors which control the surface currents. Three factors that control the surface currents are air currents, Earth’s rotation and location of continents.
Fact Card#7: Which factors affect the flow of ocean surface water? Global wind belts are a major factor affecting the flow of the ocean surface water.





Fact Card#8: How are deep currents generated in the ocean?
Difference in the water density the temperature moves the water and makes deep currents


Fact Card#9: Write down the characteristics of cold and warm water. Cold water is more dense/heavy and sinks where as warm water is less dense and floats.

Fact Card #10: Which ocean currents travel faster?
Surface currents are much faster than deep ocean currents.

Fact Card #11: Write the factors that cause the deep currents. Deep ocean currents are caused by changes in temperature salinity and density of the water.

 Fact Card #12: How do the Sun and the Moon cause the ocean currents? They make a gravity pull to cause ocean currents.

Fact Card #13: Give the definition of wave.
A wave is a rhythmic movement that carries energy through matter or space.





Fact Card#14: What are the causes of waves? Waves are caused by wind, earthquakes, gravitational force of the moon and sun.

Fact Card#15: List the characteristics of a wave. The charistics of a wave are the trough and the crest.
Fact Card#16: Write the parameters on which the wave height is dependent. Wind speed, distance over which the wind blows and length of time the wind blows.
Fact Card #17: What happens during tide? Tide is the periodic rise level  and fall  of the sea level under the gravitational pull of the sun and the moon.
Fact Card #18: What do you mean by high tide? When the water level is at its highest.

Fact Card #19: What do you mean by low tide? When the water level is at its lowest.
Fact Card #20: How does the Moon’s gravity pull ocean water? The moon's gravity pulls the water on the Earth towards it . The water moves up into a slight bulge on the side of the Earth that faces the moon.
Fact Card#21: What is the cycle duration of high/low tide? Generally one low tide /high tide cycle takes at every 12 hours and 25 min.
Fact Card#22: Define tidal range. The difference in the ocean between high tide and low tide is called tidal range.

Fact Card#23: When does spring tide occur? Spring tides occur when the Earth, the sun and the moon are in a line.
Fact Card #24: Which tides occur during a full/new moon? Spring tides occur during the full moon and the new moon.

Fact Card #25: When does neap tide occur? Neap tides occur when the Sun and the Moon are perpendicular to each other.
Fact Card #26: Which tides occur during the quarter moon? Neap tides occur when quarter moons occur. 

Fact Card #27: Which tides are known as weak tides?           Why? Neap tides are weak tides. It happens when the gravity pulls of the moon and the sun counteract each other creating weaker tidal forces.
Fact Card#28: Which tides are known as strong tides? Why? Spring tides are strong tides because the moon and the sun's force gravitational force combine to create a strong tide.