Which example is correct for the appropriate use of a scientific tool?
AA scale can be used to measure the length of pond snails.
BA graduated cylinder can be used to collect pond snails.
CA ruler can be used to measure the mass of pond snails.
DA microscope can be used to measure the weight of a pond snail.
a scale is for measuring the weight of an object.
Study the given Venn diagram and select the correct option.
|B||Mango tree||Neem tree|
Read the given passage and select the correct inferences from the information provided in it.
In liquids, the molecules are not packed as close together as in solids. There are spaces between the molecules. So, they can move around more freely. When sugar is dissolved in water, the sugar molecules fill these empty spaces.
(i) When sugar dissolves in water, the volume of water increases.
(ii) Liquid has no definite shape and volume.
(iii) Liquid can flow.
(iv) When all the empty spaces between the water molecules are filled with sugar molecules, then no more sugar can be dissolved.
A (i) and (iii) only
B (ii) and (iii) only
C (i) and (iv) only
D (iii) and (iv) only
Read the given passage and select the option which fills blanks correctly.
Many people wear particular dress called uniform. wears white coat. Ironing of clothes after washing . clothes should be dry cleaned. Insects eat up woollen clothes, so they should be stored with .
|A||Doctor||Removes dust||Cotton||Moth balls|
|B||Lawyer||Kills germs||Silk||Silver fish|
|C||Doctor||Kills germs||Woollen||Neem leaves|
|D||Teacher||Removes sweat||Jute||Neem leaves|
Ajay filled a bottle upto the rim with water, and placed it in the freezer. What he saw after a few hours is shown in the figure given here. What does it show?
AFreezing decreases mass of water.
BFreezing compresses water.
CFreezing increases volume of water.
DFreezing increases mass of water
The answer is (C).
Refer to the given figure representing seed dispersal. Select the option which correctly identifies plants X, Y and Z.
Ans 1: (Master Answer)
Dispersal of seed is carried out by wind, water, animals and by explosion. From the given figure it can be inferred that seeds of plants X are dispersed through explosion, e.g., Balsam and pea. Seeds of plant Y are dispersed by wind, e.g., Dandelion and Hiptage while seeds of plant Z are dispersed by animal, e.g., Xanthium, Urena.