Science Reviewer

• The topsoil is the uppermost layer of soil. It is exposed to the air and is dark in color due to the exposure of humus and nutrients
• The subsoil is the second layer. It is lighter in color due to the presence of clay. It is impossible to grow plants here
• The bottom layer is called bedrock. It is gray in color due to the presence of rocks
• Sand has the small particles but, has the largest among the three. It is composed of rocks and coarse. It has the lowest water holding capacity
• Clay has the smallest particles and is red in color due to the presence of iron
• Silt is very similar to sand but is dark in color and has a good water holding capacity
• Loam is the mixture of the three soils, it has a good water holding capacity
• Water can help us clean, cook, and power electricity
• Surface water is water stored above the ground
• Seas are small bodies of water that is connected to an ocean
• Oceans are large bodies of saltwater that cover most of the Earth's surface
• Seas and Oceans are not suitable for dinking and cover most of the Earth's surface
• Lakes are a large body of water that is surrounded by land. It's usually freshwater
• Rivers are the main source of water for humans and animals. You can usually drink this source of water. It is narrow and small
• Streams are smaller than rivers. It is connected to a river
• Waterfalls fall from a high place and flows through rivers and streams. It can generate electricity. This is called hydroelectric power
• A dam is a reservoir of water for people who need it in their everyday use
• Groundwater: water held underground in rocks and soil
• Springs are also a type of groundwater, it is warm or hot
• Water is very important to us

  Importance of Water:

  1. For Good Health: It is important for our digestion and absorb the food we eat. It is also good for our oxygen supply.
  2. For Home Use: For watering plants, cooking, etc.
  3. For Manufacturing: For production process
  4. For Agriculture: For planting crops
• Conserving Water Tips:

  1. Never leave a dripping faucet
  2. Limit use of water for baths
  3. Reuse water for washing fruits and vegetables
  4. Use a glass when washing your teeth
  5. Do not play with water
  6. Use a sprinkler
  7. Do not use a high pressured setting when watering plants
  8. Do not flush tissue paper
  9. Report dripping water faucets, toilets, etc
  10. Use posters and slogans reminding people to use water wisely