P4 Unit 22 Soil and Other Earth materials

P4 Unit 22 Soil and Other Earth materials

How do we classify soils?

There are many types of soils , we can classify to their texture, color and ability to retain water

Texture

• Soils is made up of three types of particles sand, silt and clay

• The texture of soil is depends on the amount of sand, salt and clay present in it

Multiple Choice

Which one of this texture options has the biggest size?

• clay

• silt

• sand

Color

• DIfferent types of soils have different colors, soils may be dark or light

• The color of a type soil depend on the types of mineral present in the soil and whether it is fertile or not

• Dark colored soil usually has a higher content of nutrient or dead plant or animal material, it is usually fertile

Water Retention

• Soil water retention refers to the ability of a soil to hold on to water

• Let's do some experiment to compare sand , clay and

• 
  

Uses of soil

Soil is used in farming and is a habitat for many organisms.

We can also obtain raw materials from soil

• 1. Faming

• 2. Habitat of organisms

• 3. Raw materials

Farming, habitat of organisms and raw materials

• 1. Farming , soil is used in farming to grow crops for food

• 2. Soil is the habitat not only for plants but animals such as woodlice and snails, microorganisms such fungi

• 3. Soil is raw materials used to make glass, cement and pottery

Multiple Choice

these are 3 uses of soil, except...

• farming

• habitat for organisms

• control all parts of plants

• raw materials

Multiple Select

Some animals live in the soil as their habitat such as

• woodlice

• snails

• fungi

• mosquito

Growing plants in soil

• to grow well plants need:

• 1. water

• 2. minerals

• 3. air

• 4. anchorage to the ground

Multiple Choice

Plants grow well in soil because soil contains water, ...... , ............. and anchorge to the ground

• minerals,air

• mineral, wind

• air, blower

• air, metal

Types of soil for plant growth

• Different types of soil support the growth of a different kinds of plants

• 1. Garden soil: contain good mix of sand , silt and clay, it retains water well and has a good supply of oxygen , plants: hibiscus, rose

• 2. Sandy soil: made up of largely of sand particles, it doesn't retain water well, good oxygen supply, plants: coconut trees, palm trees, sea shrubs

• 3. Clayey soil: made up largely of clay particles, it's retain water well, low oxygen supply, plants : rice

Multiple Choice

Different type of soil support the growth of different kinds of plants, what is the suitable plant that can grow well in clay soil ?

• hibiscus

• rose

• rice

• coconut trees

Multiple Select

Garden soil contains a good mix of sand, silt, and clay, it retains .......... well and has a good supply of ................, so it's very fertile

• wind

• water

• soil

• oxygen

Enhancing plant growth

the characteristic of a type of soil can be changed to make it more suitable for plants to grow in

• 1. Increasing the amount of air in the soil

• 2. Increasing the amount of nutrients in the soil by natural fertilisers or chemical fertilisers

• 3. Changing the amount of water in the soil

• 
  

Multiple Choice

These are 3 ways to enchancing plant growth, except ...

• increasing the amount of air in the soil

• increasing sounds around soil

• increasing the amount of nutrient in thesoil

• changing the amount of water in the soil

Other earth materials

• Rocks such as granite and basalt

• Minerals such as gold, silver, diamond

• Metals such as iron ore

• Gases such as nitrogen, oxygen, and carbon dioxide

• Water such as lakes, rivers, ponds, seas and oceans

• Fossil fuels such as coal ,oil

Multiple Choice

other earth materials that we can find under soil one of them are minerals, these are the example of these minerals...

• granite, gold

• gold, silver

• silver, oxygen

• oxygen , coal