🔹 What are Tides?

Tides are the periodic rise and fall of sea level caused mainly by the gravitational pull of the:

• 🌙 Moon
• ☀️ Sun

👉 The Moon has the strongest effect because it is closer to Earth.

🌊 Types of Tides

1. 🔼 High Tide

• When sea level rises
• Occurs when water is pulled towards the Moon
• Happens twice a day

🔹 Effects

• Helps ships enter ports 🚢
• Can cause coastal flooding

2. 🔽 Low Tide

• When sea level falls
• Water moves away from the shore
• Also occurs twice a day

🔹 Effects

• Exposes sea floor (useful for fishing) 🎣
• Can make navigation difficult

🌗 Special Types of Tides

1. 🌑 Spring Tide

• Occurs during New Moon & Full Moon
• Sun, Earth, and Moon are in a straight line

👉 Causes very high high tides and very low low tides

2. 🌓 Neap Tide

• Occurs during First & Last Quarter Moon
• Sun and Moon are at right angles

👉 Causes moderate tides (less difference)

⚙️ How Tides Work

👉 Based on Gravitational Force:

• Moon pulls ocean water → High tide
• Opposite side also experiences high tide due to Earth’s rotation
• Areas in between → Low tide

📊 Quick Difference

🌍 Importance of Tides

1. Navigation 🚢

• Helps ships move safely into harbors

2. Fishing 🎣

• Fishermen depend on tidal timings

3. Energy ⚡

• Used to generate tidal energy

🎯 Important Exam Points

• Tides occur due to Moon + Sun gravity
• 2 High tides + 2 Low tides daily
• Spring tide = highest difference
• Neap tide = lowest difference