1) Anything which occupies space and has mass is called
Ans) matter
2) The space occupied
by a substance is called its
Ans) volume
3)tha examples of matter are a)classroom b)boy and
notebook)blackboard and pencil d) all of these
Ans)All of these
4) ……………have definite shape and occupy definite space
Ans) solids
5) liquids occupy
Ans) definite space
6)these sugar can be poured a) sugar b) salt c) flour d) all of these
Ans )All of these
7)which state of matter does not have definite space?
Ans) Gas
8) matter is made of very small particles. these
particles are called
Ans) atom
9) water is made
of
Ans) oxygen and hydrogen
10) carbon dioxide is made up of
Ans) carbon and oxygen
11) a drop of water consists of ……………..molecules of
water.
Ans) billion
12)particles in a solid are unable to move that is why
a solid has
Ans) fix shape and definite space
13)which state of matter has weak forces of attractions/
Ans) gas
14)the particles of solid
Ans) vibrate at fixed position
15) the particles 0f ………….move for short distances
Ans) liquid
16) due to changes in motion and arrangement of particles
, there is a change in the
Ans) state of matter
17) solid state changes into liquid by
Ans) providing heat
18) the liquid changes into gaseous state when we provide
Ans) energy
19) in how many states of matter water exist
Ans) 3
20) The change in the arrangement of particles is called
Ans) melting
point.
21)melting changes a solid into
Ans) liquid
22) Robert Hooke explained the properties of matter in
Ans) 1678
23) Robert Hooke discover
Ans ) particles
24) the process in which a liquid changes into solid is
called
Ans) freezing
25) ……………is needed to keep the ice cream soft.
Ans) air
26) the process by which a liquid gets heat changes into
gas is called
Ans) boiling
27)the best way of killing all microorganism present in
water is by
Ans)boiling
28) The process by which a liquid changes into gas at a
temperature which is below the temperature at which it boils.
Ans) evaporation.
29)which process occur only at the surface of liquid?
Ans)evaporation
30)water covers over ….of the Earth surface
Ans 71%
31) water continuously moves between a) water bodies b)
air c) living things d) all of these
Ans) all of these
32) within one
seconds about ………..tons of water
evaporates from the surface of earth.
Ans) 16 billion
33) the evaporation of water from the surface of pklant
is called
Ans) transpiration
34) low clouds are made up of water droplets and are
……….high
Ans 2,000 metres
35) medium clouds are also made up of water droplets but
are ……………..high
Ans) 2,000-7,000 meters
36) the average speed of rain water fall is
Ns) 8-10 Km/hour
37) early in the morning and at night wat4r vapors
condense to form droplets and come down on earth as
Ans) dew
38)liquids do not have
Ans ) fixed shape
39)when you place an ice cube in a glass it changes to
water after few minutes this change is called
Ans) melting
40) dew drops are formed from water vapours in the air by
Ans ) condensation
41) by putting the glass of water in freezer it change
into ice.this change is due to the reason that water particles
Ans) discharge energy
42) if a gas is cooled it changes into liquid and liquid
on further cooling changes into solid.the reason is that
Ans) particles emit energy
43) pour cool water into glass after sometime small
droplets iof water appear on the surface of glass.this is due to
Ans) condensation
44) when ice cream is made from milk the motion of its
particles chang as
Ans) particles move more slowly than before
45) ice-cream melts by pittin it out of fridge is just
because of the particles move
Ans) for short distance
46) on cooling the things what change will occur in
matter?
Ans ) liquid changes into gas
47) water vapours are converted into water on cooling the
motion of particles will be
Ans) at short distance
48) the process in which water vapours are converted into
clouds is called
Ans) condensation
49) in extreme cold water weather in which form water
drops fall on earth
Ans) frost
50)due to this reason the gas can be compressed easily
Ans) particle are apart from one another
51)some solids can be poured because
Ans) each particle of solid keeps the same shape and
occupies the same space
52)what happens when we heat a matter?
Ans) its particle start vibrating with more force
53) evaporation occur
Ans) at all temperatures
54) water vapours interact which things to rise above
Ans) with air
55) after melting ice some parts of water observe in the
earth because
Ans) the surface of the earth is soft
No comments:
Post a Comment