Available Answers

1. 1.

   Circle the correct word.

   1. The fishing rod is an example of class-one/two/three lever.
   2. The natural source of light is - a torch/candle/firefly.
   3. The dandelion/maple/balsam seeds have wing-like structure.
   4. The sticky, swollen tip of the pistil is called style/stigma/carpel.
   5. LPG releases heat/electrical/wind energy.
2. 2.

   Choose the correct option to fill in the blank.

   1. The undigested portion of the plant food, which includes mostly fibres is called _____________ (roughage/balanced diet).
   2. The stamen has long slender stalk called ____________ (pedicel/filament).
   3. The process of removing the clear water after the sediments have settled down is called ______________ (sedimentation/decantation).
   4. The process of breaking down complex nutrients into simpler
3. 3.

   Write True and False and rewrite the false statement.

   1. When the anthers mature, they split open and the pollen grains are set free.
   2. Cocklebur seeds have wing-like structure.
   3. Chattering sound is made by sparrows.
   4. The type of pulley used to draw water from the well is movable pulley.
   5. Use a handkerchief to cover mouth and nose while coughing and sneezing.
4. 4.

   Match the following.

   1. Revolution	a. Teeth
   2. Plants	b. Always black
   3. Tick-tack sound	c. Movement of Earth around the sun
   4. Shadow	d. Producers
   5. Ross	e. Clock

    

5. 5.

   Observe the given figure, and answer the following questions.

   

   1. Name the organ shown.
   2. Describe it briefly.
   3. Where it is located?
   4. How is this delicate organ protected?
   5. Write names of its two upper chambers, and two lower chambers.
6. 6.

   Look at the given picture that shows pollination. Now answer the following questions.

   

   1. What do you understand by pollination.
   2. How many types of pollination are there? Name them.
   3. Which type of pollination does the above picture show?
   4. Define it.
   5. Pollination leads to the formation of _______________ and _________________.