Read the passage and answer the following question.

A teacher of Class VIII demonstrates the following activity in her class

"The teacher takes a small amount of sulphur in a spoon and burns it. She then puts the spoon into a tumbler with a lid to ensure that the gas produced does not escape. After a few minutes, she adds water to the tumbler."

In the above-demonstrated activity, which substance is formed when sulphur dioxide is dissolved in water?

• Sulphuric acid

• Sulphur hydroxide

• Sulphuric oxide

• Sulphurous acid

Which process skills can be promoted through the above activity?

• Observation, inference and measurement

• Observation and controlling variables

• Observation, classification and inference

• Observation and measurement

A Science teacher asks her students to put two drops each of oil and sugar solution on a flat surface. She then asks them to tilt the surface and observe the order in which the drops reach the bottom. Which property of the liquids is the teacher trying to bring to the student's attention through this activity?

• Viscosity

• Point

• Solubility

• Volume

You find that many of your Class VI students believe that raw material for plant growth comes only from the soil. Which among the following would be the most appropriate strategy to counter this idea?

• Explain in detail the process of photosynthesis and the chemical reactions involved

• Show the students a well-prepared Power Point presentation on photosynthesis

• Provide the students with a money plant in water and ask them to observe its growth and make an inference

• Provide the students with an interesting reading material on the process of food manufacture in plants

The criterion of process validity of Science Curriculum requires that

• Science should be presented as a value-free discipline uninfluenced by societal concerns

• Science should be taught as a specialised discipline with its unique characteristics

• learners should be familiarised with various natural processes

• learners should be engaged in processes that lead to generation of scientific knowledge

Which of the following is not a purpose of conducting practicals/experimental activities in Science?

• They enhance understanding of Science ideas

• They help in scoring high grades or marks

• They provide an opportunity for problem-solving

• They help in developing manipulative skills

The students of Class VII are asked the following question by a teacher.

"Two identical cubes of ice are taken out of a refrigerator. One is crushed and the other is left as it is. It is noticed that the crushed ice melts faster. What could be the reason?"

Which process skill is promoted through this question?

• Observation

• Experimentation

• Hypothesizing

• Controlling variables

A teacher of Class VII demonstrates the following activity in the class.

"A leaf is put in a test tube and spirit is poured over it. Then the test tube is put in a beaker half-filled with water and heated till the leaf is discoloured. The leaf is then taken out and a few drops of iodine are put on it. The leaf turns blue-black in colour."

After this activity, the teacher gives some questions for the assessment of various indicators of learning.

Which of the following would assess 'analysis'?

• What care is taken while pouring the spirit into the test tube?

• What care is taken 'to prevent damage to the leaf?

• What happens to the colour of the leaf when the solution is poured on it?

• Can this test be done without removing chlorophyll?

79.

You want your Class VI students to figure out that the property of solubility of salt in water can be used to separate a mixture of sand and salt. As a supporter of inquiry-oriented pedagogy, you would

• explain different methods of separation of mixtures first and then explain the separation of sand and salt mixture

• provide the mixture of sand and salt to students, ask them to think up different ways of separation and help them in trying out their ideas

• ask students to hypothesise about different ways in which a mixture of sand and salt can be separated and then lead them to the correct answer through detailed explanations

• take a mixture of sand and salt, demonstrate its separation and then ask students to repeat it on their own

Which among the following statements describes the relationship between Science and Technology?

• Technology is a more creative process as compared to Science

• Science is a broader endeavour while Technology is goal-oriented and often locale-specific

• Science is an ancient enterprise but Technology is relatively recent

• Science and Technology proceed independently and in isolation from each other