Which of the following is correct?
A Jaundice is not a communicable disease.
B Leprosy is a non-contagious disease of skin.
C Cholera spreads through contaminated air.
D Tetanus can occur due to entry of germs through cut skin.
Read the given passage with a mistake and select
the option that corrects it.
During the process of breathing (inhalation), the diaphragm muscles contract and be comes dome shaped. At the same time, intercostal muscles contract to pull the ribs upwards. This increases the volume of the chest cavity. Subsequently the volume of lungs increases. As the air pressure in the lungs decreases, air moves into the lungs through the air passage.
A The diaphragm muscles contract and become flat.
B This decreases the volume of the chest cavity.
C As the air pressure in the lungs increases, air moves into the lungs through the air passage.
D At the same time, intercostal muscles contract to pull the ribs downwards.
Which one of the following special characteristics of
animals does not help them to survive?
A Camels have long eyelashes to prevent sand from entering their eyes.
B Rhinoceroses keep their bodies cool by wallowing in mud.
C Desert foxes have large ears to help them lose heat easily.
D Kangaroo rats store fats in their humps which can be changed into water
Megha conducted an experiment to find out the requirements
for photosynthesis. She subjected the plants to different
conditions as shown in the table below. Study the table
and use it to answer the question.
Which of the following variables should be kept constant to conduct a fair test?
(i) Type of plant
(ii) Amount of soil
(iii) Size of pot
(iv) Type of soil
A i and ii only
B ii and iv only
C i, ii and iii only
D All of the above
Which of the following is a different type of change
than the others?
A Nimit leaves a piece of bread in the toaster for too long. The bread becomes black and kitchen fills with smoke.
B Madhu forgot to dry the bread knife after washing. Reddish brown spots appeared on it.
C Renu kept few naphthalene balls in her almirah. After few days, the balls disappeared from the almirah.
D A plant collects sunlight and prepare food by photosynthesis.
Study the given word-chop table. Which of the following sets of boxes will give the names of a
cooking method (X) and a food preservation method (Y) respectively?
|A||11 and 7||9 and 12|
|B||4, 6 and 7||3, 5 and 7|
|C||1, 12 and 7||2, 8 and 7|
|D||6 and 10||4 and 8|