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Unit 2 (3rd Grade)

Transcript

Plants (II)

  • Plants are living things.
  • Plants have three life processes: nutrition, interaction and reproduction.
  • Plants give us the oxygen we need to live, food, medicine and clothes.
  • Plants need sunlight, air (oxygen), water, soil and warmth to grow.

PLANT REPRODUCTION

SEPALS

  • Green small leaves that protect the flower before it opens.
PETALS
  • They can be different colours and attract insects to the flower.
STAMENS
  • They have pollen at their ends.
CARPEL
  • The seeds develop here. It includes the Stigma and the Ovary. The ovary grows into a fruit that has seeds inside.

Flowering and non-flowering plants

According to reproduction, plants are divided into: FLOWERING PLANTS and NON-FLOWERING PLANTS.

FLOWERING PLANTS

Flowering plants develop flowers and produce seeds. There are two types of flowering plants:

  • ANGIOSPERMS
  • GYMNOSPERMS

NON- FLOWERING PLANTS

Non-flowering plants don’t produce seeds. They produce tiny spores that they release into the air. Examples: fern and moss.

Angiosperms

Angiosperms produce fruit with seeds inside. They have beautiful flowers. Examples: roses, cherry trees, blackberry bushes, rice, wheat.

Gymnosperms

Gymnosperms have small flowers. They don´t produce fruit and the seeds develop inside cones. Examples: pine tree, fir tree, cypress.

Blackberry bush

fern spores

Angiosperms produce fruit with seeds inside. They have beautiful flowers. Examples: roses, cherry trees, blackberry bushes, rice, wheat.

pine tree

Fern

Mosses

TYPES OF LEAVES

LIFE CYCLE OF A PLANT

1. Most seeds need warmth, water, sunlight and air to germinate. 2. Roots grow down from the seed. 3. A stem grows up. 4. Leaves grow on the stem. The plant can now make its own food. 5. A flower grows on the plant. 6. Seeds develop in the carpel. 7. The plant dies, but new plants can grow from its seeds.

Elena Lópezhttps://elhpedroduque.blogspot.com/