☰ خطة العام · اكتشف: العلوم والدراسات الاجتماعية (بالإنجليزية)

Growing, offspring and traits

الأسبوع 16 · المحور 3 «كيف يعمل العالم؟»، الباب 1 «أنماط التغير» (أ): النمو والنسل والصفات الموروثة · 3 دروس
2

Parents and offspring

Discover P3 Term 2: Axis 3, Chapter 1
GoalExplain what offspring are, match young animals to their parents, and say why a litter looks alike but not identical.
New words
offspring · the young that a plant or animal makesparent · the mother or father of an offspringlitter · kittens or other young born to one mother at the same timealike · nearly the same, but not exactly
Explanation

Plants and animals make new living things like themselves. The new ones are called offspring, and the plant or animal that makes them is the parent. A hen’s offspring are chicks, a cat’s offspring are kittens, and a dog’s offspring are puppies. A palm tree’s offspring grow from its seeds. A cat often has several kittens at the same time, and we call them a litter. All the kittens in a litter have the same mother and the same father, so they look like their parents and like each other. But they are not exactly the same. Each kitten gets a different mixture of features from its mother and from its father. A young animal can look different from its parents at first, like a chick, but it grows to look like them.

catkittenhenchickdogpuppy
Worked examples
palm treeseedseedlingnew palm tree
A new plant starts as a seed. The seed of a palm tree grows into a seedling, and the seedling grows into a new palm tree.
012332with stripesno stripeskittens
A litter of 5 kittens. 3 have stripes and 2 do not. They have the same parents, yet they are not all the same. 3 + 2 = 5 kittens.
SameDifferent
the mother and fathersize
they are all catsmarkings on the fur
four legs, fur, whiskersfur colour
What is the same and what is different inside one litter?
Class activity

Parent cards. Draw or cut out six small cards: three parents (hen, cat, dog) and their three young. Mix them up, then match each parent to its young one. Explain how you knew. Next, with a grown-up’s help, put a bean seed on damp cotton in a clear jar. Draw it every day for seven days and write what changed. The new plant is offspring of the plant that made the seed. Wash your hands afterwards.

Practice
1
What do we call a group of kittens born to one mother at the same time?
2
Which young one is the offspring of the hen?
ABC
3
A litter has 5 kittens. Two of them have stripes. How many kittens do not have stripes?
4
Why do kittens of one litter look alike but not exactly the same?