AP State Syllabus AP Board 7th Class Science Important Questions Chapter 6 Weather and Climate
AP State Syllabus 7th Class Science Important Questions 6th Lesson Weather and Climate
7th Class Science 6th Lesson Temperature and Its Measurement Important Questions and Answers
How do elders predict rain?
- It is a common experience for everybody to hear elder people talking about the possible weather on a day before planning to celebrate a function of the family.
- They do it by observation of different seasons.
- Farmers listen to radio or watch T.V. for weather forecast.
- They depend on these weather predictions to plan their agricultural activities.
- These weather predictions effect our daily life.
How does the meteorological department make weather predictions?
- The meteorological department collects data and uses it to make predictions.
- This is about weather of Hyderabad for three consecutive days.
- We find that these aspects of weather keep changing.
- The humidity, changes, the wind changes, the temperature changes the sunrise and sunset times change too.
- Keeping all these things in consideration the department make weather predictions.
What aspects do you see in the weather record?
- We find that there are some changes in a day. But most of the day is normal.
- The weather is a complex phenomenon that it can vary over very short periods of time.
- Sometimes its sunny in the morning but clouds appear from somewhere and it starts raining.
- Within a matter of a few minutes this gives way to bright sunshine.
- We must have had several such experiences. The temperature, humidity, rain, wind speed change.
- All this effects the life of human beings and other living organisms. This constitutes weather.
Describe the construction and working of six’s maximum and minimum thermometer.
Description – and working:
- Six invented the maximum minimum thermometer (MMT) thermometer to measure highest and lowest temperatures of’a place.
- This consists of a cylindrical bulb A, connected through a U-shaped tube to spherical bulb B that contains alcohol.
- When the temperature increases, the alcohol in the bulb A expands.
- The mercury in the U tube goes up to the bulb B side and the indicatorfl^also moves up.
- This indicates maximum temperature of the day.
- If the temperature decreases,alcohol in the bulb A contracts then the mercury in the U-tube goes to the A bulb side and the indicator (I2 ) also moves up.
- This indicates the minimum temperature of the day.
- After taking readings the indicators I2 and I1 are brought to their original places by using a magnet.
How do you find the magnitude of rain fall?
- Take a 10cm wide beaker and insert a funnel of the same width.
- Keep the apparatus in an open place when it is raining.
- The rain water would be collected through the funnel into the beaker.
- After the rain is over, measure the amount of water collected in the beaker.
- If the depth of water is 1 cm then that the magnitude of rainfall is 1 cm.
Observe the weather report (temperature and rain fall) of two places in our state. The average temperature and rain fall for the last 25 years of the particular month is given in the table.
Answer the following questions:
a) In which month was maximum temperatures recorded? Why?
In the month of may maximum temperatures were recorded.
b) Comparatively which place is hot? Why?
Rentachintala is comparatively hot because the average rainfall is less compared to Arogyavaram.
c) How can you say Arogyavaram is cooler than Rentachintala in summer?
- In Arogyavaram, in the mid summer, the maximum temperature recorded was only 33°C as against 41°C recorded in Rentachintala.
- So Arogyavaram is cooler than Rentachintala.
What is meant by climate?
- The average weather pattern taken over a long time, say 25 years, is called climate of that place.
- Broadly, the same patterns of temperature, rainfall, humidity wind speed that have been generally continuing for a long time, say the last 25 years, at a place gives the climate of that place.
- If we find that temperature at a place is generally high for large part of the year, we say the climate of that place is hot.
How do we compare a place which is hot with a place which is cool?
With the help of six’s maximum and minimum thermometer we compare a place which is hot with a place which is cool.
How do meteorologists measure the rain fall? What are its units?
Meteorologists measure the rainfall using a ‘Rain gauge’. It is also called Udometer or Pulviometer or Ombrometer. They can measure exact amount of rainfall. Rainfall is expressed in centimeters or millimeters.
Why is it sweaty in Vijayawada and relatively less in Hyderabad in summer?
- Even though it is hotter, we do not sweat as much in Hyderabad.
- In places near a river or in coastal regions the weather in summer is sweaty.
- If we are in coastal region in summer we would feel very sweaty in addition to feeling hot winds.
- That is why Vijaywada is more humid than Hyderabad.
Which region on the globe is very hot and which region is very cold?
We know that in the equatorial region it is very hot and in the polar region, it is very cold.
Take a newspaper or watch the TV news and record the maximum and minimum temperature, rainfall, humidity and wind pattern of any 3 cities or towns in a table. Do this over a week.
- Here the maximum temperature recorded over a week in Hyderabad is taken.
- We will plot the graph.
- Graph showing the variation of maximum temperature during 10-14 Dec. 2011 at Hyderabad.
Collect weather reports of a nearby city from newspapers. Tabulate your Observations for a week and compare them.
- For guidance sample tabular form is given.
- The student has to perform this activity.
Answer the following questions from the data collected.
a) When was the maximum temperature recorded?
b) When was the minimum temperature recorded? Why?
c) Is there any similarity in temperatures between your school and the nearest city?
a) Pravin has measured temperature of his village with the help of MMT (Maximum, Minimum thermometer.)
b) He expressed his observations through a graph.
c) The observations are also tabulated.
d) Look into them and answer the following questions.
a) For how many days did Pravin observe the temperature of his village?
b) On which day was the highest temperature recorded?
c) On which days did the lowest temperature fall?
d) Do you find any relation between 10th and 14th of December 2011? What is that?
e) Make a graph with your observations of maximum and minimum temperatures.
a) For five days.
b) On 2nd, 3rd, 4th and 5th days the highest temperature was recorded.
c) On the 1st day the lowest temperature fall.
d) There is an increase in temperature and the rise in temperature was maintained for four days.
e) The student can do this activity.
How do you find the direction of the wind? Describe an activity.
- Let us find the direction of wind by using card board pieces and a thin nail.
- Take two cardboard pieces and cut them the shape of an arrow and paste them together.
- Insert a thin needle or iron wire as shown the figure in the middle of the arrow.
- The needle must be long enough to be fixed on a strong base and should allow the arrow to move along the direction of the wind.
With the help of an anemometer observe the directions of the wind and tabulate your observations in the table given here.
Now answer the following questions:
a) Does the wind move in the same direction the whole day?
The student can answer this by observing the data collected by him / her.
b) In which direction does it move in the morning?
This question also can be answered by the student.
What is humidity? Explain it with an activity.
Humidity: The quantity of moisture in the air is the ’humidity’ of the place. If the humidity is high when it is hot, we feel sweaty.
- Take about 10 ml. of water in a test tube. Heat it on a Bunsen burner or a candle.
- When water is heated, it changes into water vapour. The vapour enters into the air.
- In the same way sea water changes into vapour due to heating by the sun.
- That water vapour in the atmosphere is the humidity.
What happend during the tsunami in Andaman and Nicobar islands in 2004?
- Many people died during the tsunami in Andaman and Nicobar islands in 2004.
- But the tribals who observed the ocean moving back and birds making sounds moved away from danger.
- They could predict the danger and save their lives.
Write a weather report similar to the weather report given in Television.
- Isolated rain or thunder showers are lightly to occur over Chittoor, Nellore, Prakasham and some parts of Kadapa districts.
- Mainly dry weather will prevail over southern Telangana districts and northern coastal districts of Andhra Pradesh.
- Sky should be cloudy for the next two days in Kurnool and Ananthapur districts.
Describe a weather report actually given by the department.
- According to meteorological department report 42°C maximum temperature recorded at Ramagundam of Karimnagar district and 29°C minimum temperature recorded at Aarogyavaram of Chittore district.
- Because of cumulonimbus clouds 2mm of rainfall was recorded in Hyderabad.
- Scattered rainfall recorded in some parts of interior Rayalaseema.
- Remaining part of the state was dry.
What is the difference between a weather forecast and a weather report?
- The report that explains future conditions is a weather forecast.
- The report that explains about past conditions is a weather report.
- In common conversation we often refer to both as weather report.
What are the weather components?
Temperature, rain fall, wind speed, humidity…. etc., are the weather components.
How do farmers estimate the rain fall?
- Farmers estimate the rainfall based on the wetness of the soil after the rain.
- They call-it as “PADUNU”.
- This much of rainfall is sufficient to start agriculture activities like ploughing.
- This is an approximate measure.
Draw the diagram of an Anemometer what is its use?
We can measure wind speed and direction with an Anemometer.
Observe features of the following states, and specific places in India from an ATLAS. Try to write down something about the climate in these areas.
|Jammu & Kashmir|
The student with the help of the teacher can write something about the climate in those areas.
Describe the climate of our country as per the studies of IMD.
- The Indian Meteorological Department (IMD) studies climate of our country.
- Climate describes the weather condition occurring over a relatively longer period of time in a given place.
- For example in the month of June.
- We expect the weather to be mild in Bangalore, humid in Kolkata, hot and dry in parts of Rajasthan, cold in Kashmir and rainy in Coastal Kerala.
- Does it mean that in coastal Kerala it is always rainy in the month of June or if it would be always humid in Kolkata?
- Nowadays there is a complaint that climate is not as ordered as it was .
- Seasonal climatic condition do not appear as predictable and known.
How do people adjust to the climate? Why in 2010 Kurnool and other parts in Rayalaseema submerged infloods?
- The people living in an area adjust to the conditions of climate.
- For example the rain fall has being relatively less for the past two decades.
- Even in Rayalaseema during rainy season the tanks and canals remain dry.
- The dried canals and tanks are now used for other purposes.
- The less rainfall has also led to developing ways to use less water.
- The change in rainfall pattern shows there may be shifts in climate over long periods of time.
- In areas which do not have a climate of rain when it rains heavily there is no way to drain out the water.
- As a result many areas were flooded and submerged in Kurnool in 2010 and also in other parts of Rayalaseema.
How does climate effect our life style?
- Climate mostly effects on our daily life. We change our life style to suit that climate.
- We wear cotton clothes in summer.
- We want to drink cool water also.
- We take care to protect ourselves from rain.
- We take many precautions we need to take if we were going to visit Kashmir or Ooty during winter.
a) The students of Sanjamala village collected the information about the temperature of their village in 5 days and reported in the table. Observe the table.
|Date||Minimum Temperature||Maximum Temperature|
Answer the following questions:
i) On which day was Maximum Temperature recorded?
ii) On which day was Minimum Temperatrue recorded?
iii) What is the average Minimum Temperature of 5 days?
iv) What changes did you observe in the Temperature?
b) Draw a graph based on the information in the table.
a) i) 02-01-2018
iv) Lowest and highest temperatures.
What aspects should you observe to predict the weather of your village, by watching sky?
The time of sunrise and sunset, wind flow, percentage rainfall in that area should be taken into consideration to estimate the type of weather in that given area.
Table showing the variation of maximum and minimum temperature during the period between 10 and 14 September 2017 at Guntur. Based on this draw a graph.
Observe the table and write answers for the following questions.
|October||37° C||10 mm|
i) This table indicates ………….
ii) In which month was maximum rainfall recorded?
iii) Least temperature was recorded in which month?
iv) Why is maximum temperature recorded in the month of May?
i) The above table tells us about the temperature and rainfall from May to November.
iv) Because May falls in summer.
Observe the below table and write answers for the following questions.
|Weather||Day 1||Day 2||Day 3|
|Minimum temperature||21 °C||17°C||21°C|
|Sky may be||Clear||Cloudy||Cloudy|
|Wind||Very mild breeze||Mild breeze||Good breeze|
|Sunrise||6.25 a.m.||6.30 a.m.||6.31 a.m.|
|Sunset||5.40 p.m.||5.40 p.m.||5.41 p.m.|
i) What aspects did you see in the weather record?
ii) Rainfall was recorded on which day?
iii) On which day was maximum temperature recorded?
iv) Among these three days, long day is observed on?
i) Maximum temperature, minimum temperature, rainfall, sky, air, humidity, sunrise, and sunset.
ii) Second day
iii) Third day
iv) First day
Observe the diagram and answer the following questions.
i) What is the name of the apparatus in the picture?
ii) Name the liquid present in bulb – A.
iii) Name the liquid present in U-shaped tube.
iv) How is it useful in daily life?
i) Six’s maximum minimum thermometer
iv) To measure the maximum and minimum temperature of a day.
Observe the graph showing rainfall of a place from August to December. Write down the observations from it and answer the following questions.
i) Name the month in which minimum rainfall was recorded.
ii) Name the month in which maximum rainfall was recorded.
iii) Name the months in which less than 50 mm rainfall I was recorded.
iv) In which months was the rainfall recorded more than 50 nun?
iii) August, September and October.
iv) November and December.
Ritwik observed the temperature of his village and drew the following graph Analyse the graph and answer the following questions.
a) How many days does Ritwik observe temperature?
b) On which day the lowest temperature is recorded?
c) In which days does the temperature remain same?
d) What apparatus is used to measure the temperature?
a) 5 days.
b) First day
c) 2nd, 3rd, 4th and 5th days.
d) Six’s maximum-minimum thermometer.