It is advised to put oil on stagnant water to prevent the breeding of mosquitoes. This is because
(A) oil cuts off oxygen supply, thereby stops the breeding of mosquitoes
(B) mosquitoes are repelled by oil
(C) mosquitoes are killed by oil
(D) mosquitoes are killed by oil
The growth or breeding of the mosquitoes can be stopped by spraying the kerosene on the water. This happens because when we spray the kerosene then the oxygen supply to the larva (small mosquitoes) stops and they die in the water. Spreading oil over water cuts the oxygen supply, hence mosquitoes cannot breed in them.
Which one of the following insects do not live together in a colony like honeybees?
(A) Wasp
(B) Ant
(C) Termite
(D) Spider
Hence Spider is not a colonial insect and is the correct option.
As per the NCF 2005, which one among the following is the theme of EVS?
(A) Food
(B) Solar system
(C) Weather
(D) Energy
Food is the theme of EVS and rest of the topics are the themes of social science which introduces at the elementary level e.g. class-6th.
Which one among the following is the strongest argument in favor of adopting a theme-based approach in EVS?
(A) It helps in giving a structure to lesson plans and makes teaching more effective
(B) It helps in making teaching more interesting and activity based
(C) It helps in covering a wide range of concepts, issues and skills
(D) It helps in softening subject boundaries and accessing knowledge holistically
Pedagogy of thematic learning is based on its exploration of broad areas in one theme. The above points suggest that it helps in softening subject boundaries and accessing knowledge holistically. Hence, adopting a theme-based approach in EVS helps in softening subject boundaries and accessing knowledge holistically.
Stories are an important aspect of teaching-learning EVS in primary classes. Which one of the following is the least appropriate reason for including storytelling as pedagogy in EVS classrooms?
(A) Stories include experience of the people
(B) Stories cut across various subject areas
(C) Stories help in class management
(D) Stories provide contexts to relate EVS concepts
Which of the following is not a traditional source of energy?
(A) Natural Gas
(B) Mineral Oil
(C) Geothermal energy
(D) Coal
Which of these diseases is also known as 'encephalitis'?
(A) Japanese encephalitis
(B) Tetanus
(C) Dengue
(D) Rabies
Encephalitis is inflammation of the brain. Myelitis refers to inflammation of the spinal cord. When both the brain and the spinal cord are involved, the condition is called encephalomyelitis. Infections and other disorders affecting the brain and spinal cord can activate the immune system, which leads to inflammation.
Which of the following rotor will have the highest noise?
(A) Shaded pole motor
(B) Universal Motor
(C) capacitor motor
(D) All of the above will be equal
Cylindrical rotors are used in high-speed alternators having speed between 1500 rpm to 3000 rpm and salient pole rotors are used in low-speed devices, from 100 rpm to 1500 rpm. Cylindrical type rotors are used in turbo-alternators and these are made up of solid steel forging to get high mechanical stress.
The release of water vapour from the leaves is:
(A) Evaporation
(B) Transpiration
(C) Frost
(D) Dew
Evapotranspiration: What it is and why it's usefulOverall, this uptake of water at the roots, transport of water through plant tissues, and release of vapor by leaves is known as transpiration.
Bronze was made by mixing:
(A) Copper and Manganese
(B) Copper and zinc
(C) Copper and lead
(D) Iron and Tin
An alloy is a homogeneous mixture containing two or more metals in it. Bronze is an alloy made by mixing copper (Cu) and tin (Sn).
Get the Examsbook Prep App Today