6 A Boys
function of roots
absorb water nutrients from soil,firmness and anchoring to plant,store food
production of food
leaf
supports plant,conduct food material,holds other organs of plants is a function of
stem
helps in reproduction,attractive part of plant
flower
sudden event causes large scale damage to life,property and social aspects of a nation or society is
Disaster
who I am? I have specific volume, when pour on surface spreads or flows down
liquid matter
two types of disasters are
natural and man made
100 degree Celsius is the ---point of water
boiling pt or condensation pt
properties of metals
thermal and electrical conductivity,malleability,ductility ,sonority
describe vulcanization process of rubber
rubber is heated with Sulphur for 3-4 hrs to give hardness to rubber
examples of synthetic threads are
nylon,terene,terylene
importance of skeletal system
protects internal vital organs,provides proper shape to body
skull,spine and rib cage are part of
axial skeleton
types of bones
small,irregular,long,flat
upper limbs-hands and lower limbs-legs are part of
appendicular skeleton
types of joints
hinge,ball socket and gliding
importance of pigment melanin
gives colour and protects from harmful uv rays
what is sublimation?
process of conversion of solid matter directly into gases
ex of oviparous and viviparous animals
oviparous-birds,snake,turtle
viviparous-monkey,cow, human being
process of paper manfacturing
logs-small pieces-mix chemicals-pulp-dyes added-rollers and paper rolls are formed