Which of the following statements is INCORRECT?
APlant and animals help to maintain the balance of oxygen and carbon dioxide in nature.
BCamouflage is the ability of an animal to change its colour to blend or merge with its surrounding.
CDue to the extreme heat and lack of food, some animals survive the summer season by going into a kind of deep sleep called hibernation.
DFew animals living in cold Arctic and Antarctic region have a thick layer of fat called blubber under their skin.
correct ans C
A narrow beam of white light is passed through a glass prism as shown in the figure.
Which of the following is the correct order of colours emerging from the prism?
A parallel beam of light is incident on a converging lens parallel to its principal axis. As one moves the source of light away from the lens on its principal axis, the intensity of light
A Remains constant
B Continuously increases
C Continuously decreases
D First increases than decreases.
Read the given conversation.
Which of the following statements is correct regarding X, Y and Z?
A X could be ruby and Z could be tungsten.
B Y could be granite and Z could be quartz.
C X could be diamond and Y could be silica.
D Y could be graphite and Z could be tungsten.
Manish is trying to dissolve some material in the water but it is not getting dissolved.
What it could be?
A Sugar cube
B Chalk powder
C Glucose powder
D Rock salt
sugar cube A
When a teacher is talking in an enclosed air-conditioned classroom, the students do not hear echo because
(1) The wall is not big enough.
(2) Sound travels too fast.
(3) The sound energy is absorbed by the students and the furniture.
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3).
Proper terms should be used that make the meaning clearer
Which of the following statements is correct?
A Installing catalytic converters in automobiles reduce vehicular exhaust.
B Manures used to increase crop yield causes air pollution.
C Water pollution leads to soil erosion.
D Afforestation destroys habitat of land animals.
What should Jaya do to make the shadow of Object X larger?
(1) She should put Object X nearer to the screen.
(2) She should put Object X further away from the light source.
(3) She should put Object X nearer to the light source.
A (1) and (3)
B (1) and (2)
C (3) only
D (2) only