Question

Long answer questions:
1. How does the sun cause changes in the states of water?
2. List the properties of air,
3. Define land breeze,
4. What is condensation?
5. Explain sedimentation and decantation.
6. How are soluble impurities removed from water?
7. What is underground water?​

Answer 1

Answer:

1) The sun is what makes the water cycle work. The sun provides what almost everything on Earth needs to go—energy, or heat. Heat causes liquid and frozen water to evaporate into water vapor gas, which rises high in the sky to form clouds... ... This process is a large part of the water cycle.

2) The properties of air are:

Air takes up space.

Air has mass.

Air is affected by heat.

Air exerts pressure.

Air can be compressed.

Air is affected by altitude.

3) a breeze blowing towards the sea from the land, especially at night, owing to the relative warmth of the sea.

4) water which collects as droplets on a cold surface when humid air is in contact with it.

5)Sedimentation and decantation methods are used for the separation of insoluble substances which are heavier than liquid. In the sedimentation process, heavier components of the mixture settle on the bottom, due to gravity. Decantation follows sedimentation.

6) To remove soluble impurities, first, by doing solubility tests, a suitable solvent is chosen (high solubility in hot solvent, low solubility in cold solvent). The soluble impurities are then removed as follows: the desired compound along with the soluble impurities are dissolved in a MINIMUM of near-BOILING solvent.

7) Groundwater is the water present beneath Earth's surface in soil pore spaces and in the fractures of rock formations. A unit of rock or an unconsolidated deposit is called an aquifer when it can yield a usable quantity of water.

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Answer 2

Answer:

1) The sun provides what almost everything on Earth needs to go—energy, or heat. Heat causes liquid and frozen water to evaporate into water vapor gas, which rises high in the sky to form clouds... clouds that move over the globe and drop rain and snow. This process is a large part of the water cycle

2)

• Air takes up space.
• Air has mass.
• Air is affected by heat.
• Air exerts pressure.
• Air can be compressed.
• Air is affected by altitude.

3) A breeze blowing towards the sea from the land, especially at night, owing to the relative warmth of the sea.

4) water which collects as droplets on a cold surface when humid air is in contact with it.

5) Sedimentation is the tendency for particles in suspension to settle out of the fluid in which they are entrained and come to rest against a barrier. This is due to their motion through the fluid in response to the forces acting on them: these forces can be due to gravity, centrifugal acceleration, or electromagnetism.

Decantation is a process for the separation of mixtures of immiscible liquids or of a liquid and a solid mixture such as a suspension.

6)

• distillation,
• precipitation and separation,
• ion exchange, and.
• membrane separation.

7) Groundwater is the water present beneath Earth's surface in soil pore spaces and in the fractures of rock formations. A unit of rock or an unconsolidated deposit is called an aquifer when it can yield a usable quantity of water.

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