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28/04/2013-sunday
CHAPTER-1: FOOD: WHERE DOES IT COME FROM?
A
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Energy
2
...
Animal
4
...
Cheese
B
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Herbivores, carnivores, omnivores
2
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Stem
4
...
Curdling
6
...
CHOOSE THE CORRECT ANSWER:
1
...
(a) cow & horse
3
...
(d) banana
5
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(d) chicken & duck
7
...
ANSWER THE FOLLOWING:
1
...

We get food from both plants & animals
...
Why are green plants called producers?
Answer: Because they make their own food by photosynthesis
...
List out different plant parts that we eat giving two examples
...
Discuss some animal products as sources of food
...
Why is milk considered a nutritious food? Name some animals that give us milk
...

Cow, buffalo and goat give us milk
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Write a short note on any four dairy products
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Liquid part of milk is drained off & solid part form paneer
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(c)
Butter is made by churning fresh cream
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7
...

8
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Answer: Animal that eats plants is called an herbivore
...
What are carnivorous animals? With the help of examples describe some special
characteristics
...

Eg: Tigers have sharp & pointed canines to tear the flesh
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Sharks have several small sharp teeth
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What are omnivores? Give two examples
...
Eg:
human beings, bear
HOTS QUESTIONS:
1
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Animal A has flat, broad teeth, while Animal B has sharp, pointed teeth (canines)
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REWRITE THE UNDERLINED WORDS:
1
...
Hand picking
3
...
Decantation
5
...
FILL IN THE BLANKS:
1
...
Hand picking
3
...
Sieving
5
...
ANSWER THE FOLLOWING:
1
...
What is threshing? Discuss two ways in which threshing is commonly done
...

Two ways of threshing are:
(a)
Manual threshing
(b)
Machine threshing
3
...
It is done
by allowing the mixture fall from a height, so the seeds fall straight down and lighter chaff
carry away by wind
...
What is hand- picking? When is this method considered the preferred option?
Answer: Hand picking is the process of separating impurities by hand
...

5
...

Answer: Sedimentation is the process of separating insoluble solids in a liquid by allowing
them to settle down
...

6
...

Answer: filtration is the process by which an insoluble solid is separated from a liquid using a
filter
...

7
...

Answer:
(a)
Collect sea water in shallow pits & allowed to stand
...
Define saturated solution
...

To make saturated salt solution add salt to water until it will not be dissolved
...
How can the solubility of a substance be increased?
Answer:
(a)
(b)
(c)

By stirring
By making solute into powder
By boiling

FA-1
A
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The plant eaters are also called _______
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Radish is the ___________ part of a plant
3
...

4
...

5
...

B
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Why do we need food?
7
...
Why do we call bear as an omnivore?
9
...
What are dairy products? List them
...

2
...

4
...

6
...


Why milk is called a complete food?
An omnivore has different kinds of teeth
...

A tiger is a carnivore
...

Decomposers help in the recycling of nutrients
...
Why?
How are evaporation and condensation different?

CHAPTER 2- COMPONENTS OF FOOD
FIND THE ANSWERS
1
...

Answer: Carbohydrates, fats, proteins, vitamins, minerals, fibres

2
...

Answer: sugar & starch

3
...

Unsaturated fats are mostly liquid at room temperature
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Which nutrient causes obesity?
Answer: fats
5
...
Define nutrients
...

7
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Answer: Fruits, table sugar, honey
8
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Answer: oil, meat, ghee, butter, cheese, nuts
9
...
Why?
Answer: because of more fats & no nutritional value
10
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Answer: lactose

GROUP WORK
GROUP-1- CARBOHYDRATES
 Provide energy
 Types: sugar & starch
 Honey, apple, table sugar, milk
 Sugar= simple
 Starch= complex
GROUP-2-PROTEINS
 Body building nutrients
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 Healthy growth of bones
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Types: saturated & unsaturated
Saturated fats solids at room temperature
Unsaturated fats are liquids at room temperature
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 Types: fat & water soluble
 Vitamin A, D, E, K- fat soluble, stored in fat tissues of body
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Formation of bones, teeth & blood cells
Maintain normal heart beat
...
Sodium, potassium,
calcium & magnesium
 Trace mineral need in small amount by body
...

Types: soluble, insoluble
Eg: grains, carrots, cabbage, turnip, cauliflower
Water: good health, transport,
Absorb nutrients
Regulate our body temperature
...


TEXT PAGE: 26,27 LET’S ANSWER:
1
...

3
...

5
...

2
...

4
...

6
...
ANSWER THE FOLLOWING:
1
...

Answer: carbohydrates, fats, proteins, vitamins, minerals and fibres
...
Discus the two types of carbohydrates with examples
...

Answer: (a) sugar and (b) starch
(a)
(b)

Sugar is simple carbohydrate
...

Starch is complex carbohydrate
...
Eg:
rice, wheat, potato, etc
...

3
...
Give examples
...
Eg: butter, cheese, etc
...
Eg: vegetable oil
...
Write the functions of proteins in our body
...

Answer: Proteins are needed for muscle building and for repairing worn out tissues
...

5
...

Answer: Fat soluble vitamins are vitamins that are stored in fat tissue and only used
when the body needs them
...
Eg: Vitamins, B1,B2,B3,B6,B12(VITAMIN B
COMPLEX), C, FOLIC ACID
6
...
Name some good sources of minerals
...

Dairy products – rich in calcium
Green leafy vegetables – rich in iron
Fish & salt – iodine & magnisium
Citrus fruits – potassium

7
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Answer: Dietary fibres are obtained from plants only
...
They add bulk to our food to remove the solid wastes from our
body
...

8
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Answer: A balanced diet is the diet with all the nutrients in right amount
...
Why is water important for our body?
Answer:
(a)
Water helps to transport substances in the body
...

(c)
It helps to regulate our body temperature
...
What are deficiency diseases? Give five examples with related nutrients
...

Eg
Diseases
Nutrients
Kwashiorker
Proteins
Night blindness
Vitamin A
Rickets
Vitamin D
Anaemia
Iron & vitamin B12
Goitre
Iodine

11
...

Answer:
(a)
Vitamin B1
Eggs, whole grains
(b)
vitaminC
Lime, orange
(c)
vitamin D
Milk, fish
(d)
calcium
Milk, green leafy vegetables
(e)
iron
Cereals, pulses
(f)
potasium
Salt, leafy vegetables
(g)
sugar
Honey, fruits
(h)
iodine
Fish, salt
12
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Drink at least 8 – 10 glasses of water daily
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1
...

3
...

5
...
FILL IN THE BLANKS:
Cotton, Jute
Silk, Wool
Fibres, woven or knitted
Ginning
Kapok

6
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REWRITE THE FOLLOWING:
1
...
Plants
3
...
Silk cotton
5
...
Spinning
7
...
Cotton
C
...
Name the natural sources of fibres
...

Answer: Plants & animals
Cotton, silk, jute & wool
...
What are synthetic fibres? Give three examples
...

Eg: nylon, rayon and polyester
...
Describe briefly the two processes of making fabric from fibre
...
It is done with the
help of a machine called loom
...
It is
done with needles or machines
...
Write the steps involved in the production of cotton
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(b)
Cotton fibres are separated from the seeds by ginning
...

5
...

Answer: Jute is a plant fibre obtained from the bark of the jute plant
...
It is used to make ropes, mats, slippers, etc
...
What is coir? What is it used for?
Answer: Coir is the plant fibre obtained from the outer covering of coconut
...

7
...


Answer: Silk cotton is obtained from kapok tree
...
It
is used as a stuffing in pillows, sleeping bags and life jackets
...
FILL IN THE BLANKS
1
...
Nitrogen
3
...
Bad
5
...
CHOOSE THE CORRECT OPTION
1
...
(b) immiscible
3
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(c) Kerosene
5
...
ANSWER THE FOLLOWING:
1
...
Why do we need to sort materials into groups?
Answer: Placing or sorting similar things together is called grouping
...
What is classification? Identify the similarities and classify the following into two
different groups: cricket, cake, football, biscuits, table tennis, hockey, pizza,
badminton, dosa, chess, ice cream & chocolate
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Food items

Sports

Cake
Cricket
Biscuits
football
Pizza
Table tennis
Dosa
Hockey
Ice cream
Badminton
Chocolate
Chess
3
...

Answer: Lustre is the property
...

4
...


Answer: Rough materials have bumps and ridges on their surface that can be felt by
touching but smooth materials do not have bumps and ridges
...
Why are cooking utensils usually made of metals?
Answer: Because metals are good conductors of heat
...
Name two gases that are soluble in water
...

Answer: Oxygen and carbon dioxide
...
What are conductors and insulators? Give one example of each
...
Eg: metals
Insulators are substances that do not allow the electricity to pass
...
Give two examples each of the objects formed by the following materials: glass,
wood, metals
Answer: Glass – spectacles, jug
Wood – table, chair
Metals- pots, spoons
9
...

Answer: Liquids that are soluble in water are called miscible liquids
...

Liquids that are insoluble in water are called immiscible liquids
...

10
...

Answer: Flotation is the property of certain materials whether they float on or sink
in water
...

CHAPTER-6- CHANGES AROUND US
A
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Reversible
2
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Reversible
4
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Heating
B
...
True
2
...
True

4
...
True
C
...
(d)
2
...
(d)
4
...
ANSWER THE FOLLOWING:
1
...

Answer: Reversible changes are the changes that can be reversed
...
Eg: growth, breaking
glass
2
...

Answer:
Reversible changes
Irreversible changes
Dissolving salt in water
Curdling of milk
Melting of butter
Ripening of mango
Expansion of metal
Baking of cake
3
...
How can you convert liquid state of water into
its solid state?
Answer: (a) solid
(b) Liquid
(c) Gas
Liquid state of water can be converted into solid state by cooling (freezing)
...
What are physical changes? Give two examples
...
Eg: freezing of water & tearing of paper
...
What are chemical changes? Give two examples
...
Eg: baking cake & burning of paper
...
Why does a hot glass crack when placed under cold water?
Answer: It is because the outer surface of the glass contracts more as compared to
the inner surface
...
Why does an inflated balloon shrink in size when kept inside a freezer?
Answer: The balloon shrinks in size when kept inside the freezer because the air
inside the balloon contracts cooling
...
How is expansion due to heating used to fix a rubber tyre onto a wheel?
Answer: When the tyres become slightly bigger, they can be easily slipped onto the
wheels
...
So they press tightly onto the wheels and
cannot come off
...
FILL IN THE BLANKS:

1
...
Cell
3
...
Tropism
5
...
GIVE OE WORD:
1
...
Biotic
3
...
Organ
5
...
Warm blooded animals
7
...
Respiration
C
...
(d)all of these
2
...
(a) top soil, subsoil, parent material, bedrock
4
...
ANSWE THE FOLLOWING:
1
...

Answer: All the living things have the following characteristics;
a
...
They move & respond to stimuli
c
...
They excrete
e
...
They reproduce
g
...
They have life span & death
2
...

Answer: All living things are made up of cells
...

A group of tissues performing a particular function form an organ
...

A group of organ systems interacting each other to perform different life processes form
an organism
...
How do plants show movement with response to stimuli?

Answer: The movement of plants in response to stimuli is called tropism
...

4
...

5
...
What are the different components of our environment?
Answer: All that surrounds living things & affects their growth & development is called
environment
...
Biotic components (living things)
b
...
Define photosynthesis
...

Answer: The process by which green plants make their own food using CO2 & water in the
presence of sunlight & chlorophyll is called photosynthesis
...
What is recycling of nutrients? How does it take place in nature?
Answer: The movement of nutrients between soil & living things is known as recycling of
nutrients
...

8
...
They keep the environment clean by removing the dead bodies of plants & animals
...
They help in the recycling of nutrients in the environment
...
Describe with an example how biotic components interact with each other in the
environment?
Answer: Plants & animals depend on each other for various needs
...
Animals in turn help plants by pollinating flowers, dispersing seeds,
etc
...
Give two examples for each of the following:
Answer:
(a)
(b)
(c)
(d)
(e)
(f)

Unicellular animals – Amoeba, Euglena
Biotic components – Plants, Animals
Scavengers – Hyena, Vulture
Decomposers – Bacteria, Fungi
Primary consumers – Rabbit, Deer
Animals that help to loosen soil – Earthworm, Snail
CHAPTER- 8- GETTING TO KNOW PLANTS

A
...
Shoot system
2
...
Node
4
...
Stems
6
...
Transpiration
8
...
Stamen, carpel
10
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GIVE ONE WORD:
1
...
Internode
3
...
Venation
5
...
Transpiration
7
...
Ovules

C
...
Draw a well labeled diagram to show the parts of the root & shoot system of
a plant
...
1
2
...

Answer: Page no: 85, fig
...
2 & 8
...

 Also called primary or true roots
...

 Eg: Mango, pine, beetroot, etc
...

 They are thin & almost equal in size
...

3
...

Answer:
 Anchoring the plant
 Absorption of water & minerals from the soil
 Prevent soil erosion
 Some roots are modified to perform reproduction, nutrition, etc
...
Describe any three root modifications with examples
...
Roots of some plants such as radish, carrot, turnip, etc; store food & become fleshy
...
Roots of some plants such as money plant, black pepper, betel, etc; help to climb on a
support
...
Roots of some plants such as dahlia, asparagus, etc; help to multiply into new plants
...
List out the important functions of a stem
...
They hold leaves in position & help them to spread out
...
They bear flowers, buds, leaves & fruits
...
They act as pipelines & conduct water & minerals from the roots to the leaves & food
from the leaves to different parts
...
Describe any three stem modifications with examples
...
Stems of some plants such as jade & cactus store water in them
...
Stems of some plants such as cactus become leaf like & flattened & perform
photosynthesis
...
Stems of some plants such as bougainvillea and rose have thorns or sharp prickles to
protect them from being eaten
...
With the help of a well-labelled diagram, describe the structure of a leaf
...
The flat, green portion of the leaf is called leaf blade or lamina
...
A network of branching veins forms a supporting framework & also serves to transport
water & minerals
...
Petiole is a narrow stalk like structure that connects the leaf to the stem
...
Midrib is the continuation of petiole at the center of leaf
...
What is venation? Describe two types of venation in leaves
...
Two types of venation are;
a
...
Eg: banana, onion, etc
...
Reticulate venation: The veins are arranged in a net-like pattern on both sides of the
midrib
...




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