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

لينك تحميل الملزمة
https://drive.google.com/file/d/15ZLfbN_RUH_cT5258yBikCv0GMIbXhV3/view?usp=sharing

لينك تليجرام
https://t.me/mrahmedelbashagroup

In this part :
There are many things we use every day that are made from natural resources, so it is very important to conserve these resources.
Example:
Paper is made from trees.
Plastic is made from oil products.
Clothes are made from plant such as cotton and animal products such as wool of sheep.

Humans can conserve natural resources in different ways such as:
1. Preservation. 2. Sustainability.

Preservation
Example of resources preservation:
Countries prevent using or developing of natural resources in some protected areas of land such as :
- Ras Mohammed Protectorate in South Sinai.
- Wadi Al-Hitan Protectorate in Fayoum.


Sustainability
• Sustainability is an important way of resources conservation.
• Sustainability means using resources in a way that does not negatively affect the future supply of these resources.

Example of resources sustainability :

Renewable does not mean unlimited.

Examples:
- When fresh water (renewable resource) on Earth is polluted, it becomes undrinkable.

- Pollution from burning of nonrenewable resources like coal and oil leads to soil pollution that causes the death of plants and animals (renewable resources).

- Cutting down too many trees (renewable resource) leads to deforestation so, water and wind can carry away soil causing soil erosion.

 
بالتوفيق
مستر احمد الباشا