Sea Week Scavenger Hunt

Name: Wairini   
   
WALT understand Earth systems sea week context: moon, tides, ocean currents

                             Questions
                             Worksheet
Fact Card#1: How does water move on the surface of the ocean?  The water on the surface moves by waves.
Fact Card#2: How does water move below the surface of the ocean?  The water moves in currents.
Fact Card #3: What are the two types of ocean currents? The two types of currents are surface currents and deep currents.
Fact Card #4: Define ocean currents.  Ocean currents are streams that are moving in the ocean.
Fact Card #5: Define the ‘surface current’. Surface currents are currents that move on or close to the surface of the ocean.
Fact Card #6: List the factors which control the surface currents. Three of the 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? A factor that affects the flow of the ocean surface is the Global wind belts.

Fact Card#8: How are deep currents generated in the ocean? Deep currents are generated in the ocean by the temperature gradients that move the water and then it creates deep currents.

Fact Card#9: Write down the characteristics of cold and warm water. The characteristics of cold and warm water is that cold water is more dense and it sinks. Warm water is less dense and it rises up  instead.

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

Fact Card #11: Write the factors that cause the deep currents. The factors of deep ocean currents that cause the deep ocean currents are by the changes in the temperature, how salty the water is and the density of the water.

Fact Card #12: How do the Sun and the Moon cause the ocean currents? The sun and moon cause ocean currents by the gravitational pull of the sun and moon.

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

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

Fact Card#15: List the characteristics of a wave.  The characteristics of a wave are the wavelength, wave height, the trough and the crest.
Fact Card#16: Write the parameters on which the wave height is dependent.The wave depends on the wind speed, distance over which the wind blows and the length of time the wind blows.
Fact Card #17: What happens during tide? It is a periodic rise and fall of the sea level under the gravitational pull of the moon.

Fact Card #18: What do you mean by high tide? High tide means that the water level is at its highest.

Fact Card #19: What do you mean by low tide? Low tide is 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 ocean water by the gravity between the moon and earth's water. 
Fact Card#21: What is the cycle duration of high/low tide? The cycle duration of high and low tide is about 12 hours and 25 minutes.
Fact Card#22: Define tidal range. The tidal range is the difference in the ocean level between high tide and low tide.
Fact Card#23: When does spring tide occur? A spring tide occurs when the Earth, Sun and moon are in a line.
Fact Card #24: Which tides occur during a full/new moon? Spring tides occur during a full moon and new moon.

Fact Card #25: When does neap tide occur? The neap tide occurs when the moon and sun are perpendicular to each other.
Fact Card #26: Which tides occur during the quarter moon? The neap tides occur during the quarter moon.
Fact Card #27: Which tides are known as weak tides? Why? Neap tides are weak because the gravitational forces of the sun and moon 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 gravitational force combined to create a strong tide.