Buah rambutan yang masak jatuh dari pokok ke tanah. Bola yang dilambung ke atas akhirnya turun semula. Apakah yang menarik semua objek ini ke bawah?
地心引力 = graviti bumi
地球有一种力，会把所有东西拉向地球的中心，这叫地心引力。这个单元学习地心引力的意思、它带来的效果，以及没有地心引力会怎样。
例子：熟了的红毛丹从树上掉到地上；往上丢的球会掉下来。
注意：地心引力是拉向地球中心，不只是“往下”。
Earth's gravity = graviti bumi
The Earth has a force that pulls everything towards its centre: gravity. This unit covers what gravity is, its effects and what would happen without it.
Example: a ripe rambutan falls to the ground; a ball thrown up comes back down.
Watch out: gravity pulls towards the centre of the Earth, not just "down".
Kenali
Daya tarikan graviti bumi
Daya tarikan graviti bumi menarik semua objek ke arah pusat bumi. Objek yang dilepaskan dari mana-mana arah dan ketinggian akan jatuh ke arah pusat bumi.
Contoh: Kanak-kanak di Malaysia dan di Argentina sama-sama berdiri tegak kerana ditarik ke arah pusat bumi.
the pull of gravity = daya tarikan graviti
Earth's gravity (daya tarikan graviti bumi) pulls every object towards the centre of the Earth (pusat bumi). Whatever the direction or height, a released object falls towards the centre.
Example: children in Malaysia and in Argentina both stand upright because both are pulled towards the centre.
Watch out: people on the other side of the Earth do not fall off; they are pulled to the centre too.
Semak kefahaman
Ke arah manakah daya tarikan graviti bumi menarik objek?
引力的方向 = arah graviti
回想定义：地心引力把东西拉向哪里？
例子：雨滴从云里落下来，掉向地面。
注意：不是拉向太阳或天空。
direction of gravity = arah graviti
Recall the definition you just learned: in which direction does Earth's gravity pull every object, wherever it is on the planet?
Example: raindrops fall from clouds towards the ground.
Watch out: it does not pull towards the Sun or the sky.
Fahami
Kesan dan kepentingan graviti
Graviti mengekalkan objek pada kedudukannya di atas permukaan bumi. Tanpa graviti, manusia, air, udara dan objek lain akan terapung.
Contoh: Air di dalam gelas kekal di dalam gelas dan tidak terapung keluar kerana ditarik oleh graviti.
引力的效果与重要性 = kesan dan kepentingan
地心引力让东西留在地面上的位置。如果没有地心引力，人、水、空气和其他东西都会飘起来（terapung），我们不能走路、喝水，也没有空气可以呼吸。
例子：杯子里的水不会飘走，因为被地心引力拉住。
注意：太空人在太空里会飘，因为那里感受到的引力很小。
effects and importance = kesan dan kepentingan
Gravity keeps objects in place on the Earth's surface. Without it, people, water, air and everything else would float (terapung); we could not walk, drink or breathe.
Example: water stays in a glass instead of floating out because gravity holds it.
Watch out: astronauts float in space because they feel very little pull there.
Pilih semua
Pilih semua perkara yang mungkin berlaku jika tiada graviti.
没有引力会怎样 = tanpa graviti
没有地心引力，就没有力量把东西拉向地面。逐一想：什么会飘起来？河水还会往下流吗？这题有几个答案。
例子：没有引力，倒水时水不会流进杯子。
注意：“掉得更快”“下大雨”都需要引力。
without gravity = tanpa graviti
Without gravity nothing pulls objects down. Think about each: what would float? Would rivers still flow down to the sea? There are several answers.
Example: without gravity, poured water would not go into a cup.
Watch out: "falling faster" and "heavy rain" both need gravity.
Ringkasan
Syabas!
Graviti bumi
Daya tarikan graviti bumi menarik semua objek ke arah pusat bumi dan mengekalkannya pada kedudukan. Tanpa graviti, semua benda akan terapung.
