1. T 1 T 5 Life cycles
NATURAL SCIENCE Gr. 5

2. KEY WORDS Male part of a flower that produces pollen. Stamen
Pistil
Female part of a flower that produces seeds.
Gender sign for male.
Gender sign for female.

3. KEY WORDS Fine powder in flowers that help to produce seeds. Pollen
Pollinators
Animals that help with pollination for example bees and butterflies.

4. KEY WORDS The process plants use to produce seeds. Pollination
Nectar
A sweet juice produced by flowers that attract pollinators.
Fertilisation
To join particles of pollen so that a new plant can develop.

5. KEY WORDS Womb An organ inside the female body in which a baby grows.
Gills
Breathing organ of a fish.

6. Growth and development
The life cycle of a plant or animal includes all the stages and processes that take place in the life of a plant or animal as it grows and develops.
Death can occur at any life stage.
It describes how one generation gives rise to the next generation through reproduction.

7. A plant life cycle
Plant life cycle
Sprouting seed

8. Seedling or young plant
Ripe fruit
Unripe fruit
Flower
Seeds
Seedling or young plant
Mature plant

9. Seedling or young plant
Ripe fruit
Unripe fruit
Flower
Seeds
Seedling or young plant
Mature plant

10. Pollen

11. Female part of the flower = Male part of the flower:
Pistil
Male part of the flower:
Stamen

13. Stigma
Pollen
Pistil
Stamen
Ovule

17. ____ Pollinators
Pollen has to travel from the stamens of the male flowers to the pistils of the female flowers.
Many flowers have both stamens and pistils, so pollination can take place easily.
Some flowers have them on separate flowers. These flowers need pollinators to help them during fertilisation.

18. Pollen can be dispersed by wind, water, insects, birds and even mammals. We call these animals pollinators.

19. These animals are attracted by the colour, smell and taste of a flower’s nectar.
Pollen sticks to them and is then carried to other flowers.

20. Name 2 abiotic factors that can disperse (spread) pollen.
Class activity
Name 2 abiotic factors that can disperse (spread) pollen.
Wind
Water
Name 4 pollinators.
Bees
Butterflies
Humming birds
Bats

22. ____ Fertilisation Flower reproduction Stamen Flower Pollen grains 4 31 5 2 6 8 7 10 9
Pistil
Stamen
Stamen
Pollen grains
Pollen grain lands on pistil
Flower reproduction
Flower
New flower forming
Pollen tube grows down through pistil
Seed germinates to become a new seedling.
Fertilised seed inside the fruit

23. ____ Fertilisation Stamen Flower Flower Pollen grains Pistil Stamen
New flower forming
Pollen grain lands on pistil
Flower
Pollen tube grows down through pistil
Flower
Seed germinates to become a new seedling.
Fertilised seed inside the fruit

24. Pollen rubs off onto the pistils.
The pollen then grows down a small tube in the pistil until it reaches the egg cell at the bottom of the pistil.
The egg cell is fertilised and becomes a seed.
The seed is protected by a fruit.

26. ____ Seed dispersal
Seeds can be dispersed by wind, water, animals and by the plant itself.
Some seeds are eaten and then dispersed through animal faeces.
Some fruits burst open when they dry out, releasing the seeds into the air.
Others have wing-like shapes that help them to glide through the air.

27. Seed dispersal

28. Animals
Water
Self
Wind

29. ____ Animal life cycle
Not all animals take care of their young like humans do. Some mate, lay their eggs and die.
Some baby animals look like their parents. While other baby animals have to go through a few processes to look like their parents.

30. Summary on the animal life cycle
NS: Watch video on animal life cycles, topic 5.
Make a summary of the video.
Butterfly life cycle

31. Life cycle of a locust Adult male and female locusts mate.
The eggs are fertilised inside the female.
She then lays the eggs underground and covers them in a foam to keep them moist.
When the eggs hatch, nymphs appear.
Nymphs are small grasshoppers that look like their parents.
After many stages of growing they become adults and the life cycle starts all over.

32. Adult female locust laying eggs1. 2. 3. 4.
Adult female locust laying eggs
eggs
nymph
adult
eggs

33. Adult female locust laying eggs1. 2. 3. 4.
Adult female locust laying eggs
adult
eggs
eggs
nymph

35. Life cycle of a frog
Frogs live the first part of their life in water as tadpoles.
Tadpoles breathe by absorbing water through its gills.
The tadpole slowly grows legs and develops into an adult frog.

36. The adult frog can also absorb oxygen through its skin.
The adult frog can breathe air through its lungs, we call this pulmonary breathing.
The adult frog can also absorb oxygen through its skin.
The adult frog can therefore live both in water and on land.
Life cycle of a frog

38. Mature frogs mate.
Eggs are laid and fertilized.
Tadpoles develop in stages.

39. _____ Act 2. Arrange an animal life cycle
NS: T1T5 Activity 2.

40. Life cycle of mammals
Baby mammals are not born from eggs, they are born alive.
The mother suckles and takes care of her young.
The female animal carries egg cells and the male has sperm cells.
The male mates with the female and places the sperm cells into the body of the female animal.

41. When the egg- and sperm cells come together, fertilisation has taken place.
The female carries her baby in the womb.
This is called pregnancy.
The female mammal gives birth when the baby is fully developed.

42. The mother suckles her baby until it is old enough to feed.
Eventually it grows into an adult, mates and the life cycle starts again.
(See figure 6, topic 5.)

43. Act 2 MEMO, question 1 C D A E B

44. Act 2 MEMO, question 2 A D Grow C E B Baby Young animal Mature adult
Male and Female D
Baby A
Grow E
Young animal B
Mature adult
Mate
Mature

45. HOMEWORK:
NS: mind map T1T5.