Starter:Illustrate how the earth, sun and moon are positioned in relation to each other for both a Solar and Lunar Eclipse.

• What phase/position would the moon need to be in for the eclipses to take place?

Practice:Notes

2/12/2015

177 178 Moon Phases and Eclipses

2/12/2015

Application: Ws

Connection: The next Solar Eclipse is scheduled to be viewed in the US on May 20, 2015. If we are in San Antonio, explain what will we see and WHY.

Exit : Explain why we have

spring and neap tides. What is the difference between them?

Tides Tides

February 12, 2014AGENDA

Objective 8.7 C Relate the position of the Moon and Sun to their effect on ocean tides by reading and writing while completing notes and an activity ws.

1. Starter 2. Notes3. Activity

TURN IN YOUR VOCAB!!!

Date Lecture/ Activity/ Lab Page

Table of Contents

1/26 Wind, Climate, and Ocean Currents 155-1561/27 Convection and Ocean Currents 157-158 1/28 Fronts and Air Masses 159-160 1/29 Pressure and Atmospheric Movement 161-1622/2 Weather Walk Lab 163-1642/3 Severe Weather and Precipitation 165-1662/5 Rotation, Revolution, and seasons 167-1682/6 Seasons Lab 169-1702/9 Moon Phases and Eclipses 171-1722/10 Moon Phase Graphic Organizer 173-1742/11 Lunar Lollipops 175-1762/12 Tides Notes 177-178

Tides

The gravitational pull of the Moon and the Sun creates tides on the Earth.

High Tides

• During 24 hours period, two high tides occur.• High tides occur when the Earth, the Sun, and the Moon

are in a line with one another. • Each side of the earth that is in line with the sun and

moon experiences this type of tide.

Low Tides

• As earth rotates, the tides move around the Earth alternating between high and low tides approximately every 6 hours.

• In a 24 hour time period, two low tides occur. • Low tides occur on each side of the earth when the

gravitational forces of the Moon and the Sun are perpendicular to one another.

• Tidal range is the vertical distance in the height of the water between high and low tides.

• Ranges vary worldwide, from less than 30 cm (1 ft) in some places to over 15 meters (50 ft).

6 hours.

Tidal range

30 ft tidal range

Spring Tides • Spring tides are especially

strong tides and have the greatest tidal range.

• Spring tides occur every two weeks when the earth, moon, and sun are in alignment.

• These greater than average tidal ranges occur twice a month, during new and full moons, and are called spring tides.

Neap Tides• Neap tides are especially

weak tides and have the smallest tidal range.

• When the moon is at a right angle to the sun and earth, the moon’s gravitational pull is at right angles to the sun’s lesser gravitational pull.

• Neap tides occur twice a month, during the first and third quarter moons.

Starter:• Illustrate how the earth,

sun and moon are positioned in relation to each other for both a Solar and Lunar Eclipse.

• What phase/position would the moon need to be in for the eclipses to take place?

Practice:Notes

2/12/2015

177 178 Moon Phases and Eclipses

2/12/2015

Application: Ws

Connection: The next Solar Eclipse is scheduled to be viewed in the US on May 20, 2015. If we are in San Antonio, explain what will we see and WHY.

Exit : Explain why we have

spring and neap tides. What is the difference between them?

Tides Tides