امتحان ساينس Science شامل - الوحدة 3 -الصف الخامس

.............  They are stations which recycle waste water by removing harmful materials from wastewater to reuse it

Non - renewable such as  ...........

When fresh water polluted .it becomes ............ 

We can conserve water by Recycling water.

The Job of ........... is design tools that provide us with clean water

You can make clean water by adding mud to clear water.

Renewable resources can be used up if people don’t use them wisely.

...........A building established across a river which can hold water behind it     

............  removing harmful materials from water

........... leads to soil pollution that causes death of plants and animals.