grade 8 fresh and salt water systems

what is the global distribution of water

97.5% saltwater

2.5% fresh water

what are the 6 types of water resources

1. Surface Water

2. Groundwater

3. Glaciers and Ice Caps

4. Desalinated Water

5. Reclaimed or Recycled Water

6. Atmospheric Water

what are the types of landforms

arete, cirque, moraine, striation, horn and drumlin

factors affecting water quality

Factors such as pollutants, temperature, pH, and dissolved oxygen affect water quality. These elements can significantly influence the health of aquatic ecosystems and the availability of safe drinking water.

types of waves and tides

Wind Waves,Spring Tide

• Happens during full and new moons.

• Extra high and extra low tides.

Neap Tide

• Happens during half moons.

• Less difference between high and low tides.

effects of wind on waves and tides

on waves it influences how big, fast, and the direction of them but it doesnt influence tides

gravitational force (moon and earth)

What Causes Tides?

• The Moon’s gravity pulls on Earth’s oceans, causing water to bulge out.

• This creates high tide on the side closest to the Moon — and on the opposite side too!

✅ How It Works:

• High tide happens where the water bulges.

• Low tide is where the water is pulled away.

• As Earth spins, different areas move into these bulges = changing tides.

✅ Sun’s Gravity Helps Too:

• The Sun also pulls on Earth, affecting tides (less than the Moon).

• When the Sun and Moon line up, we get spring tides (extra high/low).

• When they form a right angle, we get neap tides (gentler tides).

characteristics of streams, lakes, rivers, ponds

Stream

• Small, narrow, fast-flowing

• Often joins a river

  River

  • Large, wide, flowing water

  • Flows into a lake or ocean

  • Deeper than streams

Lake

• Large, deep, still water

• Surrounded by land

• Sunlight reaches only the top

Pond

• Small, shallow, still water

• Sunlight reaches the bottom

• Plants grow throughout

what are watersheds

A watershed is an area of land where all the water (rain, snow, rivers) drains into the same place—like a river, lake, or ocean.

water is used by humans for work, play and survival

For Survival

• Drinking – essential for staying alive

• Cooking & Cleaning – safe food and hygiene

• Growing Food – used in farming and irrigation

🛠 For Work

• Farming – watering crops, raising animals

• Industry – cooling machines, making products

• Energy – used in hydroelectric dams and power plants

🎉 For Play

• Swimming & Boating – pools, lakes, oceans

• Fishing – for fun or food

• Water Parks & Sports – like water slides and kayaking

human inpact on water systems

the human inpactment can very but the roads and citys disrupt the runoff of water in the water cycle so it hinders the speed

human sources of pollution

humans polution of the water can very but mainly come from industrial waste and personal waste but there are many ways

how can aquatic enviorments help humans understand the health of water systems

the health of the enviorment can be used to