Parts of a plant

Parts of a plant

The parts of the plants are broadly classified into various categories:

Root, Stem, Leaves, Flowers, Fruits.

The following are the different parts of the plants and their functions:

Fruit bears the seed of the plant which germinates into a seedling forming the new plant.

Life cycle of plants- Part 1

Life cycle of a plant

It is braodly classified in 3 stages:

• Seed
• Seeding
• Adult plant

But it has other stages in between as described below:

• The seed first absorbs water
• Then it gives rise to the root
• Then it gives rise to the shoot system
• Finally it forms the small plant to photosynthesise

Photosynthesis: An adult green plant needs water, air and sunlight/warmth to produce it's own food. This process is called photosynthesis (photo- meaning light, synthesis- meaning making). In photosynthesis plants takes in carbondioxide and gives out oxygen.

Respiration: It is the opposite of photosynthesis. In respiration plants takes in oxygen and gives out carbondioxide. This happens in most green plants during the night time, hence no sunlight is needed.

Singapore local science syllabus

Singapore local science syllabus 

Themes	(Primary 3 and 4)
Diversity	 Diversity of living and non-living things (General characteristics and classification)  Diversity of materials
Cycles	 Cycles in plants and animals (Life cycles)  Cycles in matter and water (Matter)
Systems	 Plant system (Plant parts and functions)  Human system (Digestive system)
Interactions	Interaction of forces (Magnets)
Energy	Energy forms and uses (Light and heat)

Life Cycle- Butterfly

Life Cycle of a Butterfly

• Butterfly is an insect and has 4 stages in it's life cycle.
• The adult female butterfly lays it's eggs on the leaves. 
• It takes about 3-7 days for a egg to hatch and produce larva.
• Larva is also called as Caterpillar.
• As soon as the larva comes out of the egg 
• First it eats it's egg shell
• Then, it starts to eat the leaves.
• The larva grows and undergoes a process called as molting to form Pupa. It takes about 2-5 weeks for larva to become Pupa.
• Molting is a process of shedding of outer skin. In the entire life cycle of a butterfly it happens 5 times.
• Between formation of larva and pupa, molting happens 4 times. The butterfly keeps growing in size after each molting.
• After 4th molting the larva stops growing and forms a protective layer around it. This stage is called pupa stage or chrysalis.
• It takes about 15 days for a pupa to become an adult butterfly. The 5th and the final molting occurs at the end of pupa stage forming the adult butterfly.
• As soon as the butterfly comes out of the chrysalis it's
• wings are small
• wings are wet
• The butterfly pumps fluid to it's wings to make the wings bigger and stronger.
• It takes about 2 hours for a new born butterfly to become a fully grown strong butterfly.
• The changes that happen during the entire life cycle of an animal is called metamorphosis. It is also called as transformation.