Water Cycle Part 1 Evaporation, Transpiration, condensation

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Think of all the ways you use
water every single day.

In order for water to perform those important
functions, it needs to be replenished, purified,
and circulated again and again

​In order for water to perform those important functions, it needs to be replenished, purified, and circulated again and again.

​The water cycle describes where water is on Earth and how it moves.

Water is stored in the atmosphere, on the land surface, and below the ground. It can be a liquid, a solid, or a gas. The earth doesn't get anymore matter in its closed system, and that includes water!

Multiple Choice

Replenish means

• to waste

• to build up again

• reduce

• exhaust the supply

Multiple Choice

Purified means

• made clean

• poured down the drain

• added to a river

• given to plants

Multiple Choice

Which pictured shows the meaning of circulated

The simplest way
to describe the
water cycle, also
known as the
hydrologic cycle, is
the continuous
movement of
water on, above,
and below the
surface of the
Earth.

​When energy from the Sun reaches the Earth, it warms the atmosphere, land, and ocean and evaporates water.

The sun is what makes the water cycle work. The sun provides what almost everything on Earth needs to go—energy, or heat.

​What drives the water cycle? Water moves naturally and because of human actions. Energy from the sun and the force of gravity drive the continual movement of water between pools. The sun’s energy causes liquid water to evaporate into water vapor.

Multiple Choice

What makes the water cycle work?

• The moon

• The sun

• gravity

• The rotation of Earth

Notes:
Evaporation

Evaporation happens when a liquid substance becomes a gas. When water is heated, it evaporates. The molecules move and vibrate so quickly that they escape into the atmosphere as molecules of water vapor.

​Draw this diagram

​Heat from the sun, or solar energy, powers the evaporation process.

Open Ended

What does water need to evaporate?

​Note:
Water needs air/.radiant energy ( heat) to change it from the liquid state to a gaseous state.

Multiple Choice

Which choice below show the best description of evaporation?

• Clouds make rain

• water changed to a solid

• Water changes to water vapor

• water vapor makes clouds

Multiple Choice

Which letter in the water cycle diagram represents the solar radiation ( heat) ?

• A.

• B

Water is evaporated at

Multiple Choice

Choose the response that best describes what is happening at points A, B and C in the water cycle.

• Water at C is evaporated by B the suns radiation Ait cools to become clouds

• Clouds form at A and B makes it rain so that at C the water gets in the ocean

• Water at A is evaporated by B the suns radiation it cools to become clouds at C

​Water is in cells of every living thing!
So it's in the biosphere and can find its way into clouds too.

Leaves of plants transpire. The process is transpiration.

Transpiration is the process in which water is lost as water vapor from the aerial parts of the plants through stomata. Transpiration is essentially evaporation of water from the leaves of the plant.

Multiple Choice

The process of transpiration takes water in the plant and it goes back into the atmosphere. Which system or sphere does water travel FROM to go into the atmosphere as it leaves the leaves?

• biosphere to atmosphere

• hydrosphere to atmosphere

• lithosphere to atmosphere

Multiple Select

Chose the 2 letters from the diagram that are processes that return water to the atmosphere.

• A

• B

• C

• D

Notes:

Transpiration:
Plants release the excess water through evaporation through different plant parts such as stems or the stomata present on the surface of the leaves by the process of transpiration.

• Water leaves the biosphere and cycles to the atmosphere.

​When water evaporates and becomes water vapor- a gas. It loses energy then cools and can form clouds.
When this happens the process is called condensation.

​You may have seen this on the outside of a water bottle or a glass.
The cold water inside cools the air outside and the water forms on the outside of the container!

​This happens when dew forms of grass. This is condensation of the air close to earth and the water in the air sticks to the grass. The water vapor loses energy ( heat).

This is what happens up in the atmosphere. Water molecules stick to particles in the atmosphere and form clouds!

Multiple Choice

Condensation _____________________________

• can make dew on grass.

• is a process when water vapr is cooled.

• is the process that forms clouds.

• all of the choices

​Notes:
Condensation:

• Condensation is the process by which a gas (water vapor) turns back into a liquid, due to a reduction in the energy of its particles.

• The vapor in the air cools, when the vapor cools, it's transformed back into a liquid. This is the opposite of evaporation.

• Process that forms clouds and dew on grass