التربة: تعريف التربة وتكوينها

The video tutorial explains the definition and composition of soil, highlighting its often hidden nature beneath vegetation and structures. It describes soil as a collection of small, loose particles called granules, composed of rocks, sand, and salts. The tutorial also covers the presence of organic matter, such as dead plant and animal remains, and the role of living organisms like earthworms and bacteria in the soil. Additionally, it emphasizes the importance of air and water in the soil, particularly for plant absorption through roots.

What is a common reason why soil is not easily visible?

• It is transparent.

• It is covered by water.

• It is hidden by vegetation or structures.

• It is too small to see.

What are the small, loose particles that make up soil called?

• Crystals

• Dust

• Pebbles

• Grains

Which of the following is NOT a component of soil grains?

• Plastic

• Salts

• Sand

• Small stones

What might you find living in the soil when you dig?

• Insects

• Birds

• Earthworms

• Fish

Why is water in the soil important for plants?

• It provides nutrients.

• It helps them breathe.

• It is absorbed through their roots.

• It keeps them warm.