Here are some possible explanations for why the man is sweating a lot:- High temperature/humidity: Sweating is the body's natural cooling mechanism. When it's very hot and humid outside, the body works harder to cool itself through sweating. This man may be sweating profusely due to high heat and humidity levels. - Strenuous physical activity: Physical exertion causes the body to generate more heat. If the man has been engaged in intense exercise or labor, his body is sweating more to dissipate the excess heat produced. - Dehydration: When a person is dehydrated, their body has to work overtime to cool itself. Sweating increases as the body tries to regulate
The document contains data from an experiment measuring relative humidity and temperature over a period of 50 minutes. It records temperature and humidity readings taken at 1-minute intervals. It also includes graphs plotting the temperature and humidity measurements over time. The document discusses the results and asks questions about transpiration and the factors that influence it.
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Ähnlich wie Here are some possible explanations for why the man is sweating a lot:- High temperature/humidity: Sweating is the body's natural cooling mechanism. When it's very hot and humid outside, the body works harder to cool itself through sweating. This man may be sweating profusely due to high heat and humidity levels. - Strenuous physical activity: Physical exertion causes the body to generate more heat. If the man has been engaged in intense exercise or labor, his body is sweating more to dissipate the excess heat produced. - Dehydration: When a person is dehydrated, their body has to work overtime to cool itself. Sweating increases as the body tries to regulate
Ähnlich wie Here are some possible explanations for why the man is sweating a lot:- High temperature/humidity: Sweating is the body's natural cooling mechanism. When it's very hot and humid outside, the body works harder to cool itself through sweating. This man may be sweating profusely due to high heat and humidity levels. - Strenuous physical activity: Physical exertion causes the body to generate more heat. If the man has been engaged in intense exercise or labor, his body is sweating more to dissipate the excess heat produced. - Dehydration: When a person is dehydrated, their body has to work overtime to cool itself. Sweating increases as the body tries to regulate (20)
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Here are some possible explanations for why the man is sweating a lot:- High temperature/humidity: Sweating is the body's natural cooling mechanism. When it's very hot and humid outside, the body works harder to cool itself through sweating. This man may be sweating profusely due to high heat and humidity levels. - Strenuous physical activity: Physical exertion causes the body to generate more heat. If the man has been engaged in intense exercise or labor, his body is sweating more to dissipate the excess heat produced. - Dehydration: When a person is dehydrated, their body has to work overtime to cool itself. Sweating increases as the body tries to regulate
1. NOOR ZANARRIYAH MOHAMAD GANI D20091034842
SITI SHAHIDA MOHD AZIRI D20091034836
SARAH SABILLAH IBRAHIM D20091034820
ZAINAB FASIHAH MUHAMAD SUKARDI D20091034842
3. ENGAGE
I Need To Cool Down
Study this picture, where does the water in the
pot go? Explain.
4. EMPOWER
Planning and Doing Your Experiment
Part 1 : Relative Humidity and Temperature
Data loggerData logger
Plastic bagPlastic bag
Humidity sensorHumidity sensor Temperature sensorTemperature sensor
Retort standRetort stand
ComputerComputer
8. EMPOWER
Disccussion
Relative Humidity and Temperature
1. What cause the plastic bag to turn cloudy at the end of the experiment?
2. What triggers the water to be expelled from the plant?
3. Where does the water which has been expelled come from?
4. Which structure in the leaf helps to draw water out?
5. Which structure helps to control the opening and closing of stomata?
6. How does transpiration takes place?
7. What is the difference between transpiration that takes place during the
day and night ?
8. In your opinion, if the plant is in wilt condition, does transpiration still
take place? Why?
9. Does the water content in plant influence transpiration rate?
10. What are other factors which may influence transpiration to occur?
9. EMPOWER
Answers to Discussion
Relative Humidity and Temperature
1. There were water droplets in the bag. The bag may appear cloudy
because of water vapor in the bag.
2. The inner side of the plant is in hot condition. Thus, to make it
cooler the plant has to expelled the water out from its body.
3. The water comes from the soil. The uptake of water from the soil is
via osmosis, then the water enters neighbouring cells until it
reached the pore.
4. The structure which responsible in drawing the water out is
stomata. Stomata are a special type of pore opening on leaves of
plants. They are designed to absorb water from sources such as
rain while also removing excess water in the plant through
transpiration
10. 5. The regulation of opening and closing of stomata is controlled by guard
cell. It is one of the paired cells in the epidermis of a plant that control the
opening and closing of a stoma of a leaf. When swollen with water,
guard cells pull apart from each other, opening the stoma to allow the
escape of water vapour and the exchange of gases. When drier, guard
cells become more flaccid and move closer together, allowing the plant
to conserve water.
6. When the plant has too much water, the guard cells open and permit the
stomata to release water into the air. This water is replaced by the
movement of water from neighbouring cells. Eventually water is pulled
up the plant through cells in the trunk or stem by capillary action.
7. On a sunny day the guard cells are open and water vapour escapes
through the stomata. At night the guard cells are partially or completely
closed and little water escapes.
11. 8. No. This is because there is no supply of water from
the soil and stomata are closed. Furthermore the
wilt plant needs to conserve water until the plant
become turgid again.
9. Yes. The water content does influence the
transpiration rate. The greater the water content in
the plant body, the higher will be the transpiration
rate.
10. Transpiration is actually being influenced by
environmental factors. There are 5 factors
altogether which are light, wind, relative humidity,
temperature and soil water.
12. ENHANCE
Have you ever seen this phenomenon before.
Why does this man is sweating a lot? Explain