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question_answer1) The burning of fire needs
question_answer2) Which of the following is NOT true regarding the properties of air?
question_answer3) When Suresh blew air into a balloon it expanded. This shows that
question_answer4) Asma took two balloons. She blew air with mouth in one balloon and she filled another balloon with the vapours of boiling water. She released the two balloons and observed that the balloon with the hot vapours rose higher than the other balloon. What did she learn from this experiment?
question_answer5) When we blow air into a balloon it expands. What is the reason?
question_answer6) Which of the following does NOT disturb the balance of gases in the air?
question_answer7) Which of the following changes weather?
question_answer8) Read the data given below and answer questions 8 and 9. Jasmine conducted an experiment. She took two bowls of sand and water and placed them in sunlight. After an hour she noted the temperatures. Then she took both into her house and placed them where there was no light. She noted the temperatures again after one hour and made the following observations. Sand Water Before placing them in sunlight \[{{30}^{o}}C\] \[{{30}^{o}}C\] After placing them in sunlight for an hour \[{{36}^{o}}C\] \[{{33}^{o}}C\] After placing inside the house for one hour \[{{31}^{o}}C\] \[{{31}^{o}}C\] What is the increase in the temperature of the sand after being placed for an hour in the sunlight?
question_answer9) Read the data given below and answer questions 8 and 9. Jasmine conducted an experiment. She took two bowls of sand and water and placed them in sunlight. After an hour she noted the temperatures. Then she took both into her house and placed them where there was no light. She noted the temperatures again after one hour and made the following observations. Sand Water Before placing them in sunlight \[{{30}^{o}}C\] \[{{30}^{o}}C\] After placing them in sunlight for an hour \[{{36}^{o}}C\] \[{{33}^{o}}C\] After placing inside the house for one hour \[{{31}^{o}}C\] \[{{31}^{o}}C\] After being placed in sunlight for an hour, the air present above the sand bowl is ____ than the air above the water bowl.
question_answer10) Answer questions 10 based on the following figure. Arrow 1 represents
question_answer11) Answer questions 11 based on the following figure. Arrow 2 represents
question_answer12) Land breeze blows
question_answer13) Sea breeze blows during
question_answer14) A student took two dishes P and Q and poured equal amounts of water in them. He placed Dish P in the sunlight and Dish Q in a closed room. What is the rate of evaporation in dish P and dish Q?
question_answer15) Evaporation increases with
question_answer16) Ramu took a glass of cold water from the refrigerator and placed it on a table. After a few minutes he observed water drops on the outer surface of the glass. Why did water drops form?
question_answer17) The fine droplets observed on the leaves of plants and grass during winter mornings are due to
question_answer18) Germs present in tap water can be killed by
question_answer19) The process by which water vapour changes into water is called
question_answer20) Frozen dew is called
question_answer21) The figure below shows an activity which was carried out in a laboratory. Which of the following phenomena was exhibited by 'X?
question_answer22) The figure given below gives the following observation. What process causes the dew present on the leaf to disappear by 10.00 a.m.?
question_answer23) Anil poured equal amounts of water into four containers as shown in the figure and kept all of them out in the hot sun for an entire day. At the end of the day, he measured the amount of water left in each container. What was Anil testing for?
question_answer24) Which two of the gases given below make up more than 95% of air?
question_answer25) The diagram given below shows a part of the water cycle. What is the process taking place at the arrow labelled T?
question_answer26) What does 'X' represent in the box given below? Water \[\xrightarrow{X}\] Water vapour What does 'X' represent?
question_answer27) Which of the following represents 'X' in the given statement? Ice \[\xrightarrow{X}\]water
question_answer28) Why is the water cycle important to us?
question_answer29) Arun took out a bottle of orange juice from a freezer. After a while, he noticed some water droplets on the outside of the bottle. Where did the water droplets come from?
question_answer30) What processes is involved in the given statement? Water \[\xrightarrow{{}}\] Steam / vapour
question_answer31) Wet clothes dry faster on a
question_answer32) Water droplets that can be seen on the grass in winter mornings is because of
question_answer33) By studying the photographs of India in newspapers and TV, we can predict dangers like cyclones and heavy rainfall. These photographs are taken by
question_answer34) Which of the following causes wind to blow?
question_answer35) During winter it is warm
question_answer36) Which of these falls in different shapes?
question_answer37) Which of the following causes changes in weather?
question_answer38) Condensed water vapour which can be seen on the ground after a very cold night is the
question_answer39) On cold winter morning water vapour condenses on dust particles to form
question_answer40) ______ is added to kill germs in water.
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