Plants absorb water from the soil. The water moves from the roots through the stems to the leaves. Once water reaches the leaves, some of it evaporates from the leaves, adding to the amount of water vapor in the air. This process of evaporation through plant leaves is called transpiration.

1-As photosynthesizers, plants provide organic molecules for energy (food) for the entire ecosystem. 2- they produce oxygen, required by most organisms. 3- they provide shelter for many small organisms (hide among leaves or roots for example). 4- they help hold soil In place, as noted in another answer.

Transpiration is the process of water movement through a plant and its evaporation from aerial parts, such as leaves, stems and flowers. Transpiration also cools plants, changes osmotic pressure of cells, and enables mass flow of mineral nutrients and water from roots to shoots.

Transpiration is the loss of water from a plant in the form of water vapor. Water is absorbed by roots from the soil and transported as a liquid to the leaves via xylem. In the leaves, small pores allow water to escape as a vapor. Of all the water absorbed by plants, less than 5% remains in the plant for growth.

If the process of transpiration stops in plants, then the excess water inside the plants will not be able to come out. Hence, the plants will burst due to the presence of excess of water inside them.

Stomatal transpiration

Types of Transpiration:

• Stomatal Transpiration: The loss of water through stomata is called stomatal transpiration. It is the most common type of transpiration from plants.
• Cuticular Transpiration: ADVERTISEMENTS:
• Lenticular Transpiration:

water cycle

Factors affecting rate

Light intensity: The transpiration rate is increased due to the increase in light intensity. During daytime in the sunlight, the rate of transpiration is faster. This is because the stomata remains open to allow the inward diffusion of carbon dioxide for photosynthesis.

Light is indirectly involved in transpiration (or water loss) from leaves. Early morning, light is the trigger that causes opening of the tiny pores on the leaf surface known as stomates. Opening of stomates, in response to light, allows gas exchange between the plant and the external environment.

Plants transpire more rapidly in the light than in the dark. This is largely because light stimulates the opening of the stomata (mechanism). Light also speeds up transpiration by warming the leaf.

Yes. The rate of transpiration is lower at night than the transpiration, which occurs during the day time in the presence of sunlight. This is because the rate of transpiration is controlled by the stomatal aperture, which will be closed during night time.

Transpiration does not take place at night, because the stomata present on the leaf surface are closed during the night hours.

Stomata are mouth-like cellular complexes at the epidermis that regulate gas transfer between plants and atmosphere. In leaves, they typically open during the day to favor CO2 diffusion when light is available for photosynthesis, and close at night to limit transpiration and save water.

It is commonly assumed that transpiration does not occur at night because leaf stomata are closed in the dark. However, under conditions of high nighttime evaporative demand or low soil water availability, stomata were closed and E(n) or g(n) approached zero in eleven tree and seven shrub species.

Factors that affect transpiration in plants Any condition that affects the rate of evaporation or photosynthesis will affect the rate of transpiration and therefore the environment plays a large role. The light intensity, temperature, humidity, wind and water supply will all affect the transpiration rate.

Transpiration is affected greatly by the environment factors such as temperature, light relative humidity, wind, and so on. Transpiration increases with increasing air temperature and wind velocity. At constant temperature and wind velocity, transpiration rate is governed by moisture content of air.

When water evaporates during transpiration, the nutrients are left behind, enabling the plant to grow. Secondly, transpiration cools the plant. Many animals use water to regulate internal body temperature. Transpiration cools the plant, which may prevent the plant from overheating, especially in direct sunlight.

Transpiration stream :

• transporting mineral ions.
• providing water to keep cells turgid in order to support the plant.
• providing water to leaf cells for photosynthesis.
• keeping the leaves cool by evaporation.

Plants maintain the atmosphere. They produce oxygen and absorb carbon dioxide during photosynthesis. Oxygen is essential for cellular respiration for all aerobic organisms. It also maintains the ozone layer that helps protect Earth’s life from damaging UV radiation.

Transpiration plays an important role in the existence of plants. As discussed, Transpiration plays a significant role by removing excess water from the aerial parts of the plants. The Significance of Transpiration in plants includes: Keeps the cell turgid.

When deciding which mode of transport to use, the following factors should be taken into consideration:

• 1). Cost of Transport:
• 2). Reliability and Regularity of Service:
• 3). Safety:
• 4). Characteristics of goods.
• 5). More considerations:

Plants, especially trees, contribute to the water cycle via transpiration, where water evaporates from the surface of their leaves. Close to 10 percent of all water enters the water cycle due to plant transpiration. Animals contribute to the water cycle via respiration, perspiration and urination.

Plants put down roots into the soil to draw water and nutrients up into the stems and leaves. Some of this water is returned to the air by transpiration. During dry periods, transpiration can contribute to the loss of moisture in the upper soil zone, which can have an effect on vegetation and food-crop fields.

The water cycle shows the continuous movement of water within the Earth and atmosphere. It is a complex system that includes many different processes. Liquid water evaporates into water vapor, condenses to form clouds, and precipitates back to earth in the form of rain and snow.

The water cycle is a cycle of water which basically renews the water of the atmosphere and then causes rain. The cycle begins with evaporation where the liquid water changes its state to vapor and rises up and undergoes the next process of condensation.

It is also known as the hydrological cycle or the hydrologic cycle. During the process of the water cycle between the earth and the atmosphere, water changes into three states of matter – solid, liquid and gas. The diagram of the water cycle is useful for both Class 9 and 10.

The process in which water evaporates and falls on the land as rain and later flows back into the sea via rivers is called water cycle. 1)Water evaporates from hydrosphere(oceans, seas, river, lakes, ponds)with sun’s heat and form clouds.

THE WATER CYCLE: A GUIDE FOR STUDENTS

• Step 1: Evaporation. The water cycle begins with evaporation.
• Step 2: Condensation. As water vaporizes into water vapor, it rises up in the atmosphere.
• Step 3: Sublimation.
• Step 4: Precipitation.
• Step 5: Transpiration.
• Step 6: Runoff.
• Step 7: Infiltration.

A simple science lesson and fun water cycle video for kids in 3rd, 4th and 5th grade! The water cycle is the process of water moving around between the air and land. Or in more scientific terms: the water cycle is the process of water evaporating and condensing on planet Earth in a continuous process.

The water cycle describes the existence and movement of water on, in, and above the Earth. Earth’s water is always in movement and is always changing states, from liquid to vapor to ice and back again.

(b) The water cycle is the process by which water continually changes its form and circulates between oceans, atmosphere, and land. (d) Temperature, winds, the gravitational pull of the sun, the earth, and the moon; warm and cold currents are the factors that affect the movement of ocean water.

The water cycle is the process that re-circulates water so we can have bodies of water as well as clouds and precipitation. The first step of the water cycle is evaporation. About 85% of the water vapor in the air comes from water that evaporated from the oceans. The second step of the water cycle is condensation.

Water constantly moves around the Earth and changes between solid, liquid and gas. This all depends on the Sun’s energy. Without the Sun there would be no water cycle, which means no clouds, no rain—no weather!” “And without the Sun’s heat, the world’s oceans would be frozen!” added Marisol.

Water cycle, also called hydrologic cycle, cycle that involves the continuous circulation of water in the Earth-atmosphere system. Of the many processes involved in the water cycle, the most important are evaporation, transpiration, condensation, precipitation, and runoff.

Why is the hydrologic cycle important? The hydrologic cycle is important because it is how water reaches plants, animals and us! Besides providing people, animals and plants with water, it also moves things like nutrients, pathogens and sediment in and out of aquatic ecosystems.

Water keeps their crops and animals alive. The nutrients in the soil feed their crops so that they can grow and thrive. Those farmers who primarily grow crops depend on good soil and water conservation measures for a good harvest.

The water cycle is an extremely important process because it enables the availability of water for all living organisms and regulates weather patterns on our planet. If water didn’t naturally recycle itself, we would run out of clean water, which is essential to life.

A number of human activities can impact on the water cycle: damming rivers for hydroelectricity, using water for farming, deforestation and the burning of fossil fuels.

Water cycle is important because of the following reasons: (1) Water cycle makes fresh water available in the form of rain: The sea-water is highly salty which is not fit for drinking by animals or for the growth of plants. But the rain water is pure water. It can be utilised by animals as well as plants.

Heavy rains may lead to rise in the level of water in rivers, lakes and ponds. The water may then spread over large areas causing floods. The crop fields, forests, villages, and cities may get submerged by water (Fig. 14.11).

Being extremely light, the water vapour rises up into the atmosphere. Then, it condenses (condensation) to form tiny water droplets that further join together to form clouds. When the clouds get heavier, the water droplets from the clouds fall back to the Earth as rain.

The process of evaporation followed by condensation causes the formation of clouds. On reaching a certain height, water vapour present in air condenses to form tiny droplets of water. These water droplets collect to form clouds that float in air.

We can show that air is dissolved in water with the help of following activity: Take some water in a glass or metal container like pan and heat it. Just before water begins to boil, you will notice some bubbles at the inner surface of the pan. This shows that air is dissolved in water.

Ans: The water present on the earth evaporates due to heating by the sun. The water vapour in the air condenses to form tiny droplets of water at high altitude, which appears as clouds. Thus clouds are formed by the condensation of water vapours present in air at high altitude.

Water vapour comes into the air from the evaporation of water present on the earth (in ponds, lakes, rivers and oceans, etc.) and from transpiration. It is water vapour present in air which rises high in the sky along with hot air, gets cooled, condenses to form clouds and then brings rain on the earth.

Carbon Dioxide: Carbon dioxide is a gas produced during respiration. It is also produced on burning of organic substances. It is used by plants for photosynthesis. Composition of Air: Air is a mixture of nitrogen, oxygen, carbon dioxide, water vapour and a few other gases.

Dust is the small particles suspended freely in the air. Smoke is made up of water vapour and gases which pollute the air.

Important Uses of Air

• Sustain life and growth.
• Combustion.
• Maintaining Temperature.
• Supplier of Energy.
• Photosynthesis.

Air is pulled into the body by lungs and used to fill tiny air sacs that allow blood cells to pick up oxygen, which is then distributed across the body’s cells. Through the process of cellular respiration, this oxygen can then be used to break down sugars and create energy.