Read and download free pdf of CBSE Class 7 Science Heat Assignment. Get printable school Assignments for Class 7 Science. Class 7 students should practise questions and answers given here for Chapter 4 Heat Science in Class 7 which will help them to strengthen their understanding of all important topics. Students should also download free pdf of Printable Worksheets for Class 7 Science prepared as per the latest books and syllabus issued by NCERT, CBSE, KVS and do problems daily to score better marks in tests and examinations
Assignment for Class 7 Science Chapter 4 Heat
Class 7 Science students should refer to the following printable assignment in Pdf for Chapter 4 Heat in Class 7. This test paper with questions and answers for Class 7 Science will be very useful for exams and help you to score good marks
Chapter 4 Heat Class 7 Science Assignment
Question. A wet cloth was placed on a balance and left for several days. The change in its mass is shown in the graph below: What was the mass of WATER in the cloth at the start of the experiment?
(a) 60g
(b) 36g
(c) 24g
(d) 10g
Answer : B
Question. Identify this instrument.
(a) Compass
(b) Thermometer
(c) Car tyre pressure indicator
(d) Speedometer
Answer : B
Question. On a warm day, Suraj put a glass of cold water on the table and measured its temperature after every 2 minutes using an accurate thermometer. He made the table given below but forgot to record one reading. The temperature at 10:24 is most likely to be
(a) 14.5 (oC)
(b) 15.5 (oC)
(c) 16 (oC)
(d) 17 (oC)
Answer : C
Question. When a substance boils, it absorbs energy from the burning fuel. Which of these happens when a moth ball sublimes?
(a) Energy is neither absorbed nor released in the process.
(b) The moth ball absorbs energy from its surroundings
(c) The moth ball releases energy to its surroundings.
(d) The moth ball releases energy specifically to the air around it.
Answer : B
Question. An inventor claims that he has developed a fuel that is non-polluting and can be used as a petrol alternative. Which of these factors is NOT likely to influence its acceptance?
(a) Its performance in independent verification tests.
(b) The extent of change needed in existing car engines.
(c) The cost of the new fuel in comparison to the cost of petrol.
(d) Knowledge of the actual constituents of the new fuel.
Answer : D
Question. In the experiment shown a steel wire is tied to two chairs and kept taut. Two students sit, one on each chair. A weight is attached to the long wire with the help of a string and a pointer is attached to the weight to show the reading. What will happen to the arrow when the candles are lit?
(a) It will move up
(b) It will move down
(c) It will remain at the same position
(d) It will move up, then down" "
Answer : B
Question. Most substances expand when heated. See the picture of a thermometer before and after being heated slightly. What happens to the mercury and the glass when heated?
(a) The mercury expands and the glass contracts.
(b) The mercury expands; the glass neither expands nor contracts.
(c) The mercury neither expands nor contracts; the glass contracts.
(d) Both the mercury and the glass expand.
Answer : B
Question. Karuna takes some ice cubes from a freezer and places it in a bowl on a weighing scale. Which of these would show the position after 30 minutes?
Answer : B
Question. Students in a laboratory are told not to taste any chemicals (even common salt) in the laboratory. What is the MAIN reason?
(a) The chemicals used in the laboratory are not pure.
(b) Chemicals may have got mixed or wrongly labelled.
(c) The chemicals may get spoilt if they are touched.
(d) The chemical may get spoilt if they are touched.
Answer : B
Question. Which of these acids contains nitrogen?
(a) Sulphuric acid (H2SO4)
(b) Acetic acid (CH3COOH)
(c) Hydrochloric acid (HCl)
(d) Nitric acid (HNO3)
Answer : D
Question. The three circles represent three types of substance as indicated. In which region of this figure should common salt be placed?
(a) P
(b) Q
(c) R
(d) S
Answer : B
Question. The hardness of a mineral represented by letter 'Q' is between
The Mohs Hardness scale represents the hardness of materials. Harder materials correspond to higher numbers in the scale. Harder materials can scratch softer materials. See the table below showing the hardness values of certain materials. Study the flow chart and answer the question.
(a) 7 and 8
(b) 6.5 and 7
(c) 5.5 and 6.5
(d) 3 and 5.5
Answer : C
Question. Which letter represents the softest mineral?
The Mohs Hardness scale represents the hardness of materials. Harder materials correspond to higher numbers in the scale. Harder materials can scratch softer materials. See the table below showing the hardness values of certain materials. Study the flow chart and answer the question.
(a) T
(b) S
(c) R
(d) Q
Answer : A
Question. Which of the following will result in a chemical change?
(a) Adding curd to milk
(b) Heating candle wax
(c) Mixing salt and water
(d) Adding water to milk
Answer : A
Question. Brass, an alloy of copper and zinc, is said to be a mixture, not a compound. Why is that?
(a) No new molecule is formed or exists in brass as compared to copper and zinc.
(b) No new molecule is formed or exists in brass as compared to copper and zinc.
(c) It is easy to perfectly separate brass into its constituents - copper and zinc.
(d) A metal cannot react chemically to form a compound with any other element.
Answer : B
I. Give one word for the following.
1) The degree of hotness or coldness of a body.
2) Metal used in thermometers.
3) Instrument used to measure temperature of a body.
4) Materials that allow heat to pass through them easily.
5) Materials that do not allow heat to pass through them.
I. Fill in the blanks.
1) Air is a ________ conductor of heat.
2) Solids ________ on cooling.
3) Heat is a form of energy that travels from a _______ object to a _______ object.
4) A spoon kept in a cup of hot tea gets heated by _________
5) The normal body temperature is _______ oC or _____oF.
6) ________ is the best conductor of heat.
7) Ice melts at ______ oC or ______ oF.
8) Water boils at _______oC or ______oF.
9) Black bodies ________ and emit ________ heat the best.
10) The another name of clinical thermometer is __________ thermometer.
II. State true or false.
1) Heat cannot travel in vacuum.
2) Gases expand the most while solids expand the least on heating.
3) Room heaters warm the rooms by conduction.
4) Blankets keep us warm at night in winters.
5) The wooden handle of a pressure cooker prevents conduction of heat to the hand.
III. Match the following.
A B
1) Conduction a) day
2) Radiation b) solids
3) Heat c) night
4) Sea Breeze d) energy
5) Land Breeze e) vacuum
IV. Define.
i) Energy
ii) Temperature
iii) Conduction
iv) Convection
v) Radiation
V. Give reasons
i) Evaporation of sweat causes cooling.
ii) Ventilators are provided near the ceiling of a room.
iii) Clinical thermometers have a kink in the capillary tube
VI. Draw the diagram of the following:
i) Sea Breeze
ii) Land Breeze
Please refer to attached file for Heat CBSE Class 7 Science Heat Assignment
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CBSE Class 7 Science Chapter 4 Heat Assignment
We hope you liked the above assignment for Chapter 4 Heat which has been designed as per the latest syllabus for Class 7 Science released by CBSE. Students of Class 7 should download and practice the above Assignments for Class 7 Science regularly. We have provided all types of questions like MCQs, short answer questions, objective questions and long answer questions in the Class 7 Science practice sheet in Pdf. All questions have been designed for Science by looking into the pattern of problems asked in previous year examinations. You can download all Revision notes for Class 7 Science also absolutely free of cost. Lot of MCQ questions for Class 7 Science have also been given in the worksheets and assignments for regular use. All study material for Class 7 Science students have been given on studiestoday. We have also provided lot of Worksheets for Class 7 Science which you can use to further make your self stronger in Science.
You can download free Pdf assignments for CBSE Class 7 Science Chapter 4 Heat from StudiesToday.com
All topics given in Chapter 4 Heat Science Class 7 Book for the current academic year have been covered in the given assignment
No, all Printable Assignments for Chapter 4 Heat Class 7 Science have been given for free and can be downloaded in Pdf format
Latest syllabus issued for current academic year by CBSE has been used to design assignments for Chapter 4 Heat Class 7
Yes, we have provided detailed answers for all questions given in assignments for Chapter 4 Heat Class 7 Science