Multiple Choice QuestionsA feather weighing 5 g and a nail weighing 10 g have the same kinetic energy. Which of the following statements is true about the momentum of the two bodies?
The heavier body will have higher momentum
Both will have equal momentum
It is not possible to compare the momentum of two objects
The lighter body will have higher momentum
The inner surfaces of food cans are coated with tin and not with zinc because
zinc is more reactive than tin
zinc has a higher melting point than tin
zinc is less reactive than tin
zinc is costlier than tin
Green plants appear to release oxygen instead of carbon dioxide into the atmosphere during the day time because
green plants respire only during the night time.
green plants respire during the day time but are involved in photosynthesis during the night time.
the rate of photosynthesis is higher than the rate of respiration during the day time.
green plants do not respire during the night time.
While selecting a performance task to help students develop research-oriented skills in a Science class, a teacher may pick up a topic
which majority of the students in a class find interesting
which she thinks is important for the students
related to a problem faced by students in their day-to-day functioning and which is a part of the concepts to be covered for this class
from the content given in the syllabus which must be completed in time
A Science teacher plans group activities to teach 'Properties of Air' to her students of Class-VI. Which one set of attributes would she like to have in the students she selects as group leaders?
Ordering students to take roles and deliver in consonance with their understanding
Giving major roles to brighter students to ensure the group finishes first
Assigning roles as per capability, motivating and coordinating among the group members
Freedom to choose roles, work at their own pace and understanding
An air bubble inside water behaves like a
convex lens
plane-convex lens
concave mirror
concave lens
Most Boards of Education have banned the dissection of animals because
procuring animals has become an expensive proposition
there is a need to sensitise students to prevention of cruelty to animals
they may spread new diseases
animals are no longer available for dissection
A common characteristic feature of plant sieve-tube cells and mammalian erythrocytes is
absence of chloroplast
absence of cell wall
presence of haemoglobin
absence of nucleus
While diluting sulphuric acid, it is recommended that the acid should be added to water because
acid may break the glass container
dilution of acid is highly exothermic
dilution of acid is highly endothermic
acid has strong affinity for water
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