The Treasure Beneath our Feet

Q. How plants prepare their own food?

A. Through process called photosynthesis.

 Q. Where photosynthesis takes place in plants?

A. -In leaves and In green parts of plants.

 Q.What is the name of the part of the plant from where plants absorb water and minerals?

  A. Roots

 Q..How the food (which is made in leaves) and water.Which is absorbed by roots) in the plant is transported to different parts of the plants?

A.-Through transportation system.

Q. What is xylem?

A.Water and minerals absorbed by the roots travel up to the leaves via tube like tissues called xylem.

Q. What is meant by ascent of the sap?

A,The process of transportation of water through xylem is called ascent of the sap.

->Sandy soil does not hold water therefore the ball made up of sandy soil crumbles, clayey soil retains water and also its particles size are small, therefore the ball made up of clayey soil feels smooth and It retains the shape.

->-Loamy soil retains enough water and also it is a mixture of all three particles-sand, silt and clay therefore the ball made of this soil feels partly gritty and partly smooth.

Q. Which soil is considered to be the best for agriculture?

A.loamy soil

Q. Which soil is considered to be the best for constructing building materials?

A.Sandy soil

Q.Soil is considered to be the best for making the pots?

A.Clayey soil

Q. What are the main three types of particles in the soil?

A.Sand, clay and silt

Q. Which soil has largest size of particles?

A.Sandy soil

Q..Which soil has smallest size of particles?

A.Clayey soil

Q.How the concentration of larger or smaller particles present in the soil can affect the movement of the water in the soil?

A.Concentration of larger size particles will allow the water to flow easily through the soil, while the concentration of smaller size particles in the soil will slow down the water movement in the soil/

->Too much of acid produced in the stomach causes acidity.

Q.Causes of soil pollution: ®

Too much use of insecticides and pesticides during farming ®

 Allowing untreated sewage water to seep into the soil.

 Disposal of non-biodegradable substances like plastic bags on the soil.