Different Types Of Soil

Types of Soil and Animal Tracks

Types of Soil and Animal Tracks

Things you will need:

  • Information pertaining to animal tracks.
  • Containers that are big enough to be held. Four of them.
  • Sand bag
  • Camera
  • Pencil and textbook
  • Potting soil – One bag
  • Towel
  • Sink
  • Spray attachment

How to do it:

  • Firstly, we will make four sets of soil. Take the above mentioned four containers and fill them with these types of soil.
  • In the first two of the four containers fill sand and in the remaining two fill soil. Remember to put around an inch of sand and soil so that proper tracks may form.
  • Now spray one container each of sand and soil with water so that they become damp. The soil and sand should be properly wet be sure of that.
  • Coin a hypothesis as to what will happen when the tracks are formed on different types of soil and sand.
  • Dry out your hands and press them into the dry sand first and then into the dry soil. Clean any extra dirt sticking to your hand.
  • Moving on, use the wet mud and sand and one by one put your hand in them, imprinting them in the process. Your hands should be cleaned once done.
  • Take note of the shape and clarity of the handprints. Take a photograph for the record. Record the differences and similarities.

What happens?

The dry sand and soil were not able to hold the fingerprint and the imprint started caving around the edges. Where the wet sand forms clumps and does not work well, the wet mud is a perfect medium to hold the impression.

Why does that happen?

Dry sand does not perform well cause of its smooth nature. It slips through the cracks and does not retain its shape. When wet, the sand solidifies into such a consistency that’s apt for taking impressions but the problem is that it does not retain the shape and when dry it can be gone with the wind.

Coming down to soil, we know that it has more organic material to hold itself together. The gives it a spring that sand’s texture does not have. The tracks are more clearly visible and stay crisp for a longer amount of time in these types of soil. Damp soil is one of the best surfaces to find tracks on and even when the soil dries only a small amount of cracking takes place in the prints.

Practise This Question

In a given shell, the order of screening effect is?