Primary 3 Classes

Understanding the fundamentals and concepts in Science is the way to succeed and excel.

At primary 3, teachers would usually try as much as possible to keep lessons fun and engaging. However, children tend to have difficulties in answering questions in booklet B as they find making connections between concepts and explanations challenging.

Our role is to help your child to apply his knowledge learnt to answer the question succinctly. The wide exposure of an array of questions and hands-on practical sessions ensure every child that we teach can ace in science.

Topics Big Ideas
Diversity

– Living & Non-living Things

– Materials

Classification and Characteristics of Living Things

–          Animals (Insects, Fish, Amphibians, Birds, Mammals, Reptiles)

–          Plants (Flowering & Non-flowering plants, Parts of a plant)

–          Fungi (Mushroom, Mould, Bracket fungi, Yeast)

–          Bacteria (Useful & Harmful Bacteria)

Materials

–          Natural (Plant & Animal)

–          Man-made

 

Cycles

–   Life Cycle of Animals

–   Life Cycle of Plants

Life Cycle of animals and plants

–          Animals

Three stages:

Frog, Chicken, Cockroach, Grasshoppers, Dragonfly, Spider

Four stages:

Mosquitoes, Housefly, Butterfly, Moth, Beetle, Meal worm beetle

Life cycle of a plant

–          Germination (conditions needed for germination)

Systems

–   Body Systems

Body system – muscular system, skeletal system, digestive system, respiratory system and circulatory system

 

Interactions

–   Magnets

Magnets

–          Characteristics of magnets

–          Making magnets

–          Uses of magnets

 

 

Primary 3 - Topic : Living and Non-living Things

What are living things?

  • Living things are things which are alive.
  • Plants and animals are living things.

Examples include humans, animals, plants etc.

Living things and their characteristics

1) Living things need air, food and water to survive.

Withoutair,water andfoodfor aperiodoftime, they willdie.

Question 1:  Does plant needs air, food and water to survive? How does the plants obtain its food?

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2) Living things reproduce

Living things reproduceto ensure the continuity of their own kind.

This is to ensure that the species will not become extinct.

They lay egg(s) or give birth to young alive.

Question 2:

(a) Based on the diagram above, which group of plants does the plant above likely belong to? Give a reason for your answer.

(b) How does this plant reproduce?

(c) This plant was then placed in a black box for one week. Jane observed that the plant had died. Give a reason why.

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Question-2

3) Living things can grow.

The young of living things can grow to become like their parents.

They can grow in height or length.They also increase in size, becoming bigger and stronger too.

Question 3:

(a) From the above diagram, state what has happen to the organisms?

(b)What are the possible reason(s) for your answer in (a)?

  1. The cells have increased in numbers.
  2. The cells have increased in size.
  3. The cells have died and replaced themselves.
question-3

Question 4:

(a) The diagram above shows a balloon where its size increases as the man blows it.

Suggest reasons why the increase in size is not considered growth.

BALLON

4) Living things can respond to changes around them

Plants move by growing towards sunlight.

Some plants are sensitive to touch and close up when they are touched. E.g. Mimosa plant and Venus flytrap plant

When the weather is cold, we put on more clothing to keep ourselves warm.

When an animal senses danger, it will make its escape.

5) Living things will die.

Living things may also die when they do not have enough air, food or water, become very ill, are eaten up by other living things.

Different kinds of living things have different life spans. Life span refers to how long a living thing can live.

What are Non-Living things?

  • Non-living things are things which are notalive.
  • They are not able to reproduce, grow, move or respond to changes around them.
  • Examples include plastic ruler, wooden table, porcelain bowl, etc.

Classification

  • There is a great variety of things around us.
  • Classification makes it easier to study the diversity of things around us. By classifying things, we are able to understand the similarities and differences between them.
  • In order to organize the diversity of things around us in an orderly manner, we need to place them into different groups based on their characteristics.
  • We can classify things according to their shapes, sizes, colours and patterns.

Classification of Plants

  • Plants can be grouped (classified) into flowering and non-flowering plants.
  • Both flowering and non-flowering plants shared the same characteristics; reproduce, grow, can respond to changes around them and they will die.
  • However, flowering plants reproduce from seeds and non-flowering plants reproduce from spores.

Classification of Animals

  • Animals can be grouped into various groups; mammals, birds, fish, amphibians, reptiles and insects.
  • These animals have different methods of reproduction, body coverings, etc.

Mammals Amphibians Birds Reptiles Fish

Insects

Characteristics Characteristics Characteristics Characteristics Characteristics

Characteristics

 

✔ Have hair on body

✔ Give birth to young

✔ Feed the young with milk

✔ Breathes through lungs

E.g. monkeys, bears, whales

 

✔ Skin is always wet with a layer of slime

✔ Can live on land and in water

✔ Most have gills when young and lungs when they are adult

✔ They can also absorb oxygen through skin.

✔ Many lay jelly-covered eggs in water

 

E.g. frogs, salamanders

 

 

✔ Have feathers on body

✔ Lay eggs

✔ Have a beak, a pair of wings and a pair of legs

 

E.g. owls, chickens

 

✔ Have scaly skin as body covering

✔ Lay eggs

✔ Breathe through lungs

 

E.g. lizards, snakes, crocodiles and turtles

 

✔ Live in water

✔ Have scales on body

✔ Have fins to swim

✔ Use gills to breathe

✔ Lay eggs

 

E.g. sharks

 

✔ Have 6 legs

✔ A pair of feelers

✔ Have 3 body parts (head, thorax, abdomen)

✔ Lay eggs

 

E.g. ants

Note :

·      Platypus and Spiny Anteaters are mammals that lay eggs.

Note :

·      Emu, Kiwi, Penguin and Ostrich are flightless birds

Note :

·      Molly, Guppies and Swordfish give birth to young alive

Characteristics of Fungi

    • Fungi are living things but they are NOT plants or animals.
    • Fungi do NOT make food and they do not have chlorophyll.
    • Some fungi, like yeast, are too small to be seen with the naked eye.
    • Examples of fungi are mushroom, bread mould, yeast, bracket fungus
    • Fungi can grow on living or deadplants and animals which they absorb as food.
    • They reproduce from spores

Question 5

Jackson has two slices of identical bread, A and B.

(a) Suggest reasons for Bread A not to grow mould while Bread B grows a large number of mould.

(b) Jackson says that mould belong to the group of fungi and all fungi are micro-
organisms. Explain why Jackson is wrong.