Available Answers

1. 1.

   What are the conditions needed for a seed to germinate?

2. 2.

   What is the difference between voluntary and involuntary muscles?
3. 3.

   Which force is responsible for the formation of tides in the water of the ocean?
4. 4.

   Explain the layers of the atmosphere.
5. 5.

   Put a cross (X) on the wrong word in the sentences given below.

   1. Solar eclipse occurs when moon/mars comes in between the sun the earth.
   2. The study of earthquakes is called seismology/radiology.
   3. Ozone layer is found in troposphere/stratosphere.
   4. A person injured by rusty/glass objects should be given an anti-tetanus injection.
6. 6.

   Fill in the blanks.

   1. Approximately _______________ per cent of air is oxygen.
   2. _______________ is the rise in temperature of the earth due to the presence of more greenhouse gases in the atmosphere.
   3. A person with fractured bones should move with the help of _______________ .
   4. Night blindness is caused by the deficiency of _______________.