(a) What is the true shape of the earth?
Earth is slightly flattened at the North and the South Poles and bulge in the middle. The true shape of the earth is a sphere flattened at the poles. Such a shape is called a geoid.
(a) How does a planet differ from a star?
Ans. No, each species requires a different kind of food.
(a) The process by which the water is converted to water vapour is called _______.
(b) The process by which water vapor is converted into water is known as _______.
(c) If there is no rainfall in a region for a year or two, it may lead to ________ in that region.
Q1. Give 2 examples of water, land and air modes of transport
Water – Boats and ships
Land – Cars, Bikes and trucks
Air – Helicopters and airplanes
1. Why should we have to separate various components of a mixture? Give some examples.
Among various components of a mixture, there are so many substances, which could be harmful or not useful. To eliminate those harmful or useless components, we should separate them.
1) Fill in the blanks:
(a) Joints of the bones help in the _______________ of the body.
(b) A combination of bones and cartilages forms the _____________of the body.
(c) The bones at the elbow are joined by a ______________.
(d) The contraction of the ______________ pulls the bones during.
Q1. Classify the objects or materials given below as opaque, transparent or translucent and luminous or non-luminous:
Air, water, a piece of rock, a sheet of aluminium, a wooden board, a sheet of polythene, a sheet of cellophane, a CD, smoke, a sheet of plane glass, fog, a piece of red hot iron, an umbrella, a lighted fluorescent tube, a wall the fame of a gas burner, a sheet of cardboard, a lighted torch, a wire mesh, a mirror, kerosene stove, sun, firefly, moon, a sheet of carbon paper.
ANS: The surroundings where animals dwell in comfort zone is called habitat. The animals depend on their habitat for their shelter, food, water and other needs. Example: Lion lives in the den.
1. Do correct the following and rewrite them.
(a) Water and minerals are absorbed by stem from the soil.
(b) The one that holds the plant upright are leaves.
(c) The thing that conduct water to the leaves are roots.
(d) Number of sepals and petals in a flower are always equal.