Subject science

Materials that do not allow light to pass through them are called ______ materials

• Translucent

• Transparent

• Opaque

Small stones that are formed from broken rock pieces are called ______.

• Gravel

• Rocks

• Soil

Rocks expand due to ____

• Cold

• Heat

• Weathering

The smell of perfume spreads everywhere when it is sprayed in one corner

• The molecules in a gas are very loosely packed and move freely in all directions

• The molecules in a liquid are very loosely packed and move freely in all directions

• The molecules in a gas are tightly packed and can't move freely in all directions

Which is/are the correct order from the three main layers of soil

• Bedrock,Subsoil,

  Topsoil

• Topsoil,Bedrock,

  Subsoil

• Topsoil,Subsoil, Bedrock

• Subsoil,Topsoil, Bedrock

Water is essential for plant growth. _______ is the main source of water for most of the plants. But,we do not get rain all the time. So,plants have to be watered.

• Rain

• Cloud

• Wind

__________ is the process by which a liquid is passed through a ______ to remove all impurities

• Decantation,decant

• Sedimentation,sediment

• Filtration,filter

Topsoil is very important for the growth of the plant as it contains minerals. so, farmers improve the fertility of topsoil by adding manures and fertilizers, adopting crop rotation, and through irrigation.

• True

• False