Wild animals, Animals that live in nature; examples: wild pig, monkey, bird; we should not hurt them., Plants provide animals with…, Food; shelter; oxygen., Animals help plants by…, Spreading seeds; providing nutrients through waste; helping some flowers., Interdependence, Animals and plants need each other; plants provide food and shelter; animals help plants grow or spread., Forest, A place with many trees; many animals and plants live there; it provides shelter., Wetland, A wet natural place; some birds, fish and plants live there; it is an important habitat., Rare animals and plants, Their numbers are decreasing; they need protection; example: Chinese White Dolphin., Chinese White Dolphin, Young dolphins are grey and spotty; adult dolphins are pink; their numbers are decreasing., Incense Tree, It can be used for making incense; it was common in Hong Kong in the past; it is now under threat., When we see wild monkeys…, Stay calm; walk past them slowly; do not shout or throw stones., Respiratory system parts, Nose; trachea; bronchi; lungs., Breathing in, Air flows into the lungs; chest expands; body takes in oxygen., Breathing out, Air flows out of the lungs; chest contracts; body removes carbon dioxide., Nose → ? → ? → lungs, Nose; trachea; bronchi; lungs., Oxygen, The gas our body needs; we take in oxygen when we breathe in; there is more oxygen in air we breathe in., Carbon dioxide, The gas our body removes; we breathe it out; there is more carbon dioxide in air we breathe out., Lime water test, Carbon dioxide turns lime water milky; air we breathe out turns it milky faster; it has more carbon dioxide., Flu, Caused by viruses; can be passed from one person to another; symptoms: fever, cough, runny nose., Hay fever, Cannot be passed to others; symptoms: sneezing, blocked nose, runny nose; different from flu., Protect respiratory system, Maintain fresh air indoors; exercise more; wear a mask in clinics or hospitals., What harms the respiratory system?, Smoking; dirty air; poor indoor air., 4Rs Principle, Reduce; reuse; recycle; replace., Reduce, Use less; buy only what we need; order less food., Reuse, Use things again; use old clothes again; give baby clothes to others., Recycle, Sort things for recycling; examples: paper, plastics, glass, metals; keep them clean and dry., Replace, Use reusable things; avoid disposable things; example: use a reusable bottle., Food waste, The most produced solid waste in Hong Kong; we should not waste food; order or cook suitable amounts., How to reduce food waste?, Buy only what we need; cook suitable amounts; take away leftovers., Landfills, Most solid waste goes there; they may cause pollution; they may cause smell and health problems., Green shopping, Think before buying; buy only what we need; avoid excessive shopping., Clean recycling: paper, Remove non-paper materials; remove tape and plastic-coated pages; keep paper dry., Clean recycling: plastic bottles, Remove bottle caps; remove labels; rinse before recycling., Clean recycling: cans, Rinse cans; crush cans before recycling; keep them clean., Foam boxes, Cannot be recycled in the workbook question; do not put them in the recycling bin; this is an exam trap., Before recycling, we should…, Sort out recyclable things; keep them clean; keep them dry.

Science u2-4

by
Print
Embed

Leaderboard

Visual style

Options

Switch template

Continue editing: ?