شرح ساينس الصف الخامس الابتدائي لغات مستر احمد الباشا
ساينس خامسة ابتدائي

لينك تحميل الملزمة
https://drive.google.com/file/d/1zYYUjZCtOasFc3UmdRS9Df2nyGUZ3aqx/view?usp=sharing

لينك تليجرام
https://t.me/mrahmedelbashagroup

In this part :
classify the following into hydrosphere or biosphere as the example given:
• A bird makes a home in a tree. • Water evaporates from a pond.
• Saltwater waves crash in the ocean. • Ants eat a piece of bread.
• Running water in a river. • A snake eats a rat.

Types of Aquatic Ecosystems
Aquatic ecosystems on Earth can be classified in different ways such as, they can
be classified into:
- Saltwater ecosystems. - Freshwater ecosystems.
1. Saltwater ecosystems
• Oceans are the largest saltwater ecosystems that cover large parts of Earth's surface.

Saltwater ecosystems of oceans and seas include :
Shallow areas: These areas contain coral reefs and intertidal ones .
Deep areas: These areas are called abyssal zones which are very deep areas in oceans, so that sunlight cannot reach them.

Saltwater lakes:
- Some lakes have salt water.
- Lake Assal in Djibouti is an example of saltwater ecosystem.
- Lake Assal has a high concentration of natural salts, so it is too salty for fish and most aquatic animals to live in also, there are few plants that can grow in this area.
- There are many different types of bacteria live in Lake Assal.
- Lake Manzala, Lake Mariout, Lake Bardawil and Lake ldku are saltwater lakes found in Egypt.


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مستر احمد الباشا