The video explains ocean currents, focusing on how temperature and density differences create them. Through a demonstration using hot and cold water with food dye, viewers see how denser cold water flows beneath warmer water, forming currents. The video also highlights convection currents and the role of salinity and temperature in ocean currents.

What materials are used in the demonstration?

• A container, sand, hot and cold water, and food dye

• A container, food coloring, hot and cold water, and oil

• A container, food coloring, hot and cold water, and food dye

• A container, food coloring, hot and cold water, and salt

What causes surface currents in the ocean?

• Wind

• Temperature differences

• Salinity differences

• Earth's rotation

Tags

NGSS.MS-ESS2-6

What is the temperature of the warm water used in the demonstration?

• 80 degrees

• 90 degrees

• 70 degrees

• 60 degrees

What color represents the hot water in the demonstration?

• Red

• Yellow

• Green

• Blue

Why does cold water flow underneath warm water?

• Cold water is more dense

• Cold water is less dense

• Cold water is lighter

• Cold water is warmer

Tags

NGSS.MS-ESS2-6

What happens when the cold blue water is released?

• It stays on top of the warm red water

• It evaporates

• It flows underneath the warm red water

• It mixes immediately with the warm red water

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What is the purpose of introducing a third temperature in the demonstration?

• To show how different temperatures evaporate

• To show how different temperatures separate

• To show how different temperatures mix

• To show how different temperatures create waves

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What color represents the third temperature in the demonstration?

• Green

• Blue

• Yellow

• Red

Tags

NGSS.MS-PS3-4

What are the two main factors that create ocean currents?

• Pressure and wind

• Wind and Earth's rotation

• Salinity and pressure

• Temperature and salinity

Tags

NGSS.MS-ESS2-6

What does the demonstration help us understand about ocean currents?

• How they are formed by changes in Earth's rotation

• How they are formed by changes in pressure and wind

• How they are formed by changes in temperature and salinity

• How they are formed by changes in water depth

Tags

NGSS.MS-ESS2-6