(i) Distance/ Time = \(\frac { 4 }{ 2 } { \times }{ 4 }=\frac { 16 }{ 2 } =8\)
(ii) Distance/ Time = \(\frac { 4 }{ 2 } { \times }{ 8 }=\frac { 32 }{ 2 } =16\)
(iii) Time/ Distance =\(\frac { 1\emptyset }{ 2\emptyset } { \times }{ 12 }=\frac { 12 }{ 2 } =6\)

The settling down of heavier component of a mixture when allowed to remain undisturbed for some time is called sedimentation.

Lemon juice is a mixture because it is a miture of lemon extract, water and sugar.  This is a mixture though the amount of sugar and water added is different we know that, in a mixture the components are mixed in any proportion.

We have to separate mixture,
(i) to remoe impurities
(ii) to separate useful components
(iii) to get a highty pure form substance

Matter is defined as anything that has mass and takes up space.

The green leaves prepare food by the.process of photosynthesis.

The area where a particular organism actually lives is called its habitat.

Cactus, Agave, Aloe, Bryophyllum

Based on habitat, plant are classified as
i) aquatic plants
ii) terrestrial plants.

Rotation of the Earth about its axis repeats its motion after a fixed interval of time of 24 hours. So the rotation of the earth is a periodic motion

I will be at rest with respect to my friend sitting next to me.

The different tyes of motion based on the path are:
1) Linear motion
2) Curvilinear motion
3) Circular motion
4) Rotatory motion
5) Oscillatory motion
6) Zigzag or Irregular motion

Force is push or pull by an animate or inanimate agency.

1 millimetre < 1 centimetre < 1 Metre < 1 kilometre.

Fixation, Absorption, Conduction, Transpiration.

Root, Stem, Leaf, Flower.