A. Observe the following picture and fill in the blanks:
| Floats, Oil tanker, Oil sill, Spreads |
This is a picture of an …………….. at sea. We can see, the ………………. on the water. The oil spill
…………………. far and wide killing all the living things in the sea water.
B. While learning to swim, children are first trained with air filled tubes. Why?
C. Take a tub of water or trough of water. Drop the following and record your observations in the table below:
D. Observe the following pictures and fill in the blanks:
1. DEAD SEA: ……………… is the ……………. sea in the world. One liter of the Dead sea water contains around ……………… gm of salt in it. The water of Dead Sea will be very ……………. to taste. The interesting fact about Dead sea is a person will never drown but will ………………….. in it due to the high density of water.
2. DANDI MARCH: …………… made a law in which they did not allow the Indians to make salt and they also put ……………… on salt. People could not make salt even for use at home. So, in ………………… , ……………….. along with several people undertook March of about …………… from ………………. to Dandi seashore in Sujarat to break the law made by the British. This tAarch is called ……………… .
3. PREPARATION OF SALT: The ………………… is collected in shallow beds in the sand. Sea water is allowed to ………………. in the …………….. .The water dries and …………….. is left behind.
E. Fill in the blanks:
1. A soap ……………….. in the water but a soap case with soap ……………… in the water.
2. On ………………… sugar gets quickly dissolved in water.
3. Oil does not ………………… in water.
4. The ……………….. can be used to make salt.