خارطة ذهنية تلخص مكونات الجهاز العصبي بشكل مترابط و متسلسل لترسيخ الفكرة و زيادة القدرة على التركيز و استرجاع المعلومات بشكل أفضل

Painting of Alder fly ( Sialis lutaria) DISTRIBUTION Occurs in Europe and into Russia. HABITAT Larvae inhabit the depths of still waters and muddy backwaters of rivers.FEEDING ECOLOGY AND DIET Larvae feed on worms, insect larvae, and other small...

Vector generated image of Stealth bomber--The Northrop Grumman B-2 Spirit (also known as the Stealth Bomber) is an American heavy bomber with "low observable" stealth technology designed to penetrate dense anti-aircraft defenses and deploy both conventional and nuclear weapons. Because of its...

Painting of Mountain bluebird ( Sialia currucoides)is a medium-sized bird weighing about an ounce, with a length from 15-20 cm (6-8 in). They have light underbellies and black eyes. Adult males have thin bills. They are bright blue and somewhat lighter beneath. Adult females have duller blue...

Painting of Eastern bluebird ( Sialia sialis) DISTRIBUTION Eastern North America, north to Hudson Bay, west to Arizona, south to Bermuda, Florida, and Mexico. HABITAT Open woodland, farmland with scattered trees, orchards, gardens with trees and shrubberies. EEDING ECOLOGY AND DIET Feeds largely...

Painting of Alder Fly(Sialis lutaria) larva:Larvae inhabit the depths of still waters and muddy backwaters of rivers.

تتكون الأرض من الطبقة الخارجية وتسمى القشرة وتقسم إلى قشرة قارية غنية بالسيليكون والألومنيوم وتدعى السيال ، والقشرة المحيطية الغنية بالمغنيسيوم والألومنيوم...