Earth Science Week 23

Unit 4 – Hydrology

Tides, Waves & Currents

Monday Warmup (119)

• What types on living organisms live in the ocean?

• Where would you find some of these organisms?

Cornell notes: p. 388 – 393Section Review P. 393

• Plankton

• Nekton

• Benthos

• Benthic environment– Intertidal zone– Sublittoral zone– Bathyal zone– Abyssal zone– Hadal zone

• Pelagic environment– Neritic zone– Oceanic zone

Tuesday Warmup (119)

• What is nekton and where does it live?

Cornell notes: p. 388 – 393Section Review P. 393

• Plankton

• Nekton

• Benthos

• Benthic environment– Intertidal zone– Sublittoral zone– Bathyal zone– Abyssal zone– Hadal zone

• Pelagic environment– Neritic zone– Oceanic zone

Wednesday Warmup (119)

• Why is the weather in England different than Newfoundland in Canada even though they are nearly the same latitude?

Straw Currents

Notes - Currents• Current – movement of water in ocean

• Surface current - movement near surface caused by winds, spinning earth, and continental margins.

Surface currents

What happens to the currents at continental edges?

What happens at the equator?

• Colliding Whirls (P. 415)

Coriolis effect

• Demo – water bottles in bucket.

Deep Current

• Deep current – movement of deep water caused by density.

• Antarctic is denser and moves toward Arctic which is less dense and moves on top.

• Density caused by temperature & salinity.– Cold (decreased temp) increases density– Increased salinity increases density. – Evaporation also increases salinity.

Thursday Warmup (119)

• Describe three things that affect the surface currents in the oceans.

Temperature of water

• Demonstrate how different temperatures of water interact

Density

• Demonstrate how different densities of water interact.

Surface Current Map

• Color and label the surface currents p. 419.

Friday Warm Up

• Describe a wave.

Cornell notes (IAN) p. 426-431Section Review p. 431

• Wave diagram with parts labeled• How are waves formed• How do waves move• How do you calculate wave speed?• Compare deep water and shallow water waves.• Undertow• Longshore current• Whitecap• Swell• Tsunami• Storm Surge

Wave Lab

Friday Warm Up (119)

The moon is mainly responsible for Earth having high and low tides.

If the moon were the mass of a golf ball, the sun would have the mass of about 110 school buses combined. Why does the moon have more effect on our tides than the Sun does?

Cornell Notes (p. 432-435)Section Review p. 435

• Tides

• High tide

• Low tide

• Timing of tides

• Tidal range

• Spring tide

• Neap tide

• Diagrams of position of sun, moon and earth during spring tide and neap tide.