Science process skills/Hypothesizing

Activity - 1
Assessing Students’ Explanations:

1.Water got some kind of affinity towards salt, sugar and hence they got dissolved in water of beakers ‘A’ and ‘B’, whereas water has no affinity towards iron fillings and sand and hence they remained un-dissolved in beakers ‘C’ and ‘D’ – A grade.

2.Water, sugar and salt are like substances while sand and iron fillings are unlike substances to water, hence sugar and salt dissolved leaving sand and iron fillings – B grade.

3.Students could not give any answer – C grade.

Activity - 2
Asseing Students’ Explanation:

1.If the base increases or height decreases things/objects are more stable or stability increases – ‘A’ grade

2.Things with wide base and short length are score stable and others are not much stable – ‘B’ grade

3.Some objects are stable and some objects are not stable – ‘C’ grade

Activity - 3
Assessing Students' Explanation:

1.Students say that stability of the object is depending upon base area and nearness of centre of gravity of the object to the earth – ‘A’ grade

2.When things are placed on the floor, instead on table, they would not get disturbed – ‘B’ grade

3.Even when jolt is not given to the table objects may fell down – ‘C’ grade

Activity - 4
Now the teacher asks the students to give their reasoning and assess them.

1.Students say that solubility increases with stirring and heating – ‘A’ grade

2.Stirring alone improves solubility of the sugar – ‘B’ grade

3.Solubility does not depend upon temperature – ‘C’ grade

Activity - 5
Assessing Studnets' Explanation:

1.When a number of forces acting on an object it is easy to keep it in equilibrium – ‘A’ grade

2.As the moving bicycle is under the influence of centripetal and centrifugal forces, the bicycle is balanced – ‘B’ grade

3.By practice/skill we can balance the bicycle – ‘C’ grade

Activity - 6:
'''Assessing Studnets' Explanation:==

1.The volume of oxygen released is inversely proportional to the pressure exerted – ‘A’ grade

2.The volume of oxygen released is directly proportional to the pressure exerted – ‘B’ grade

3.The volume of oxygen released is not related to the pressure exerted – ‘C’ grade

OR

1.A child interpreting correct hypothesis along with full additional relevant information – ‘A’ grade

2.A child interpreting the correct hypothesis – ‘B’ grade 3.A child interpreting irrelevant hypothesis – ‘C’ grade

Activity - 7:
Assessing Students' Explanation

The teacher guides the children by providing opportunity till the end of the concept compensation point.

1.A child who interprets the correct answer with accurate reasoning – ‘A’ grade

2.A child who interprets the correct answer without reasoning – ‘B’ grade

3.A child who interprets inappropriate reply – ‘C’ grade

Activity - 8:
Assessing Studnets' Explanation

1.A child who hypothesizes the essentiality of various factors of photosynthesis gradually – ‘A’ grade

2.A child who hypothesizes correct relationship between sunlight and photosynthesis – ‘B’ grade

3.A child who formulate defective hypothesis – ‘C’ grade