Class 5 Science Lesson 1

 

 Exercise 1: Scientific Learning Process

1. Tick (✓) the correct option:

(a) What is required for observation?

→ iii. Sense organs ✅

(b) What is the property of an object that cannot be known by observation?

→ iv. Combustibility ✅

(c) Which of the following works comes under the scientific learning process?

→ i. Discovering new things by observation, experiment and inquiry ✅

(d) Which of the following is the importance of the scientific learning process?

→ i. To learn or discover something new ✅

2. Write (✓) for correct and (✗) for incorrect statements:
👉

(a) To learn about the roughness of an object by feeling it is an example of observation. → ✓

 (b) The actual quantity of the object can be identified from observation. → ✗

 (c) A hypothesis must be tested to determine whether it is true or false. → ✓

 (d) Inquiry has to be done to find out the cause of the facts obtained from observation and tests.✓

(e) Modern laboratory is required for scientific learning. → ✗

 

3. Fill in the blanks:

👉

(a) Observation is done with the help of sense organs.

(b) The result obtained at the end of an experiment is called conclusion.

 (c) The knowledge collected from a test or experiment is called information.

 (d) Properties of an object can be determined through observations, tests and experiments.

4. Answer the following questions:

(a) What is observation? List the properties of objects that can be and cannot be known by observation.

 👉 Observation means knowing about the properties of objects using sense organs. The properties that can be known by observation are colour, shape, taste, roughness, smell, etc. The properties that cannot be known by observation are weight, flammability, solubility, etc.

(b) List any four properties of an object that can only be known by testing and experimenting but not by observing.

 👉 The four properties are: weight, solubility, volume, and flammability.

(c) To know the weight of an object, we must weigh it. Is this an observation, experimentation, or inquiry? Why?

 👉 It is experimentation because actual weight cannot be known just by observing. We need to measure it with instruments.

(d) You have been given some table salt and cooking oil. If you are to do a comparative study of various properties of these two substances, what different scientific processes will you apply, and how?

 👉 We will use observation to know the colour and texture. We will use testing to know solubility and weight. We may use inquiry if any doubt arises.

(e) How does inquiry help in the learning process? Clarify with examples.

👉 Inquiry helps to discover new information and understand reasons behind observations and results. For example, Ayusha used inquiry to find why milk cannot light a lamp while oil can.

 Exercise 2: Scientific Apparatus and Schematic Diagrams

1. Tick (✓) the correct option:

(a) What are the characteristics of a schematic diagram?

→ D. two dimensional ✅

(b) Which of the following is the correct schematic diagram?

→ C. ✅ (choose actual schematic image if shown)

(c) What is the main advantage of a schematic diagram?

→ B. easy to make ✅

(d) There is some water in a bottle. To find the volume of that water, which of the following tools would you use?

→ C. measuring cylinder ✅

(e) What is the main reason for using equipment made of glass for holding chemicals in a laboratory?

→ C. because glass is transparent and does not erode ✅

2. Write (✓) for correct and (✗) for incorrect statements:

👉

(a) Schematic diagram should always be drawn with a single line. → ✓

 (b) Measuring cylinder is used to find the hotness or coldness of an object. → ✗

 (c) Schematic diagram is quick and easy to draw. → ✓

 (d) Schematic diagram is made attractive by filling in color and shading. → ✗

 (e) Dimensions of an object can be compared based on the schematic diagram. → ✓

3. Fill in the blanks:

👉

(a) A drawing made using lines or symbols is called schematic diagram.

 (b) Tripod stand is used for raising a flask while heating.

 (c) Observation is easy in glass test tubes, beakers and flasks because they are transparent.

 (d) Physical balance is for measuring the mass of an object.

4. Match the instruments:

👉

Instrument	Picture (if shown)
(a) Funnel	Matches with Funnel image
(b) Beaker	Matches with Beaker image
(c) Conical flask	Matches with Conical flask image
(d) Measuring cylinder	Matches with Measuring cylinder image
(e) Test tube	Matches with Test tube image

5. Answer the following questions:

(a) What are the points to be considered while making a schematic diagram? Mention any four points.

👉 Use only single lines, avoid colour or shading, do not close the top, draw two-dimensional image, and keep proper proportion.

(b) Mention any three importance of the schematic diagram.

👉 It is easy to draw, saves time, and clearly shows arrangement of equipment or structure.

(c) Prepare a table comparing the apparatus in kitchens and laboratories used for a similar function.

👉

Kitchen Apparatus	Laboratory Apparatus	Use
Gas stove	Bunsen burner	For heating
Cooking pot	Beaker/Flask	For holding/heating liquids
Stand for utensils	Tripod stand	For raising utensils

(d) Draw a schematic diagram of your home and nearby places.

👉 [Draw a simple line map with symbols for school, road, square, house]

(e) Draw the schematic diagram of: Tripod stand, Beaker, Test tube, Conical flask

👉 [Draw simple line diagrams as taught]

Exercise 3: Measurement of Length, Mass, Time, Volume

1. Tick (✓) the correct option:

(a) Which of the following quantities is equal to 5200 cm?

→ A. 52 m ✅

(b) What is the total amount of matter in an object called?

→ B. mass ✅

(c) How many centimetres are equal to 10 inches?

→ B. 25.4 ✅

(d) It is 2:50 PM on Hari’s watch. What will be the time on his watch 3 hours and 10 minutes later?

→ A. 6:00 PM ✅

(e) What is the meaning of the given figure (×10)?

→ B. multiply by 10 to convert centimetres to millimetres ✅

(f) Which unit is used to measure the length of a pencil?

→ D. centimetre and millimetre ✅

(g) Which of the following is the largest unit?

→ A. yard ✅

(h) Length = 4 cm, Volume = 64 cm³. What are their units?

→ B. cm, cm ✅

(i) What is the volume of the box: 16m × 16m × 12.4m?

→ A. 3174.4 m³ ✅

(j) School starts at 9:45 AM and ends at 4:00 PM. Time between?

→ B. 6 hours 15 minutes ✅

(k) Cauliflower weighs 1800g. What is its mass in kilograms?

→ B. 1.8 ✅

(l) What is the length shown in the picture?

→ B. 3.4 cm ✅

2. Write (✓) or (✗):

(a) Objects of equal volume have equal masses. → ✗

 (b) Traditional instruments for measuring volume are Maana and Paathi. → ✓

 (c) There are 24 hours in a day. → ✓

 (d) Volume of irregular object can be measured with a measuring cylinder. → ✓

 (e) One foot is equal to 12 inches. → ✓

3. Fill in the blanks:

(a) One thousand metres is equal to one kilometre.

 (b) One cubic metre is equal to 1000 liters.

 (c) Objects having no height or thickness have a surface but no volume.

 (d) The definite quantity used to measure physical quantities is called unit.

 (e) Measurement is the process of comparing an unknown quantity with an existing quantity.