Primary 2 Science

Something with life, such as animals, plants and people.

Something without life, such as stones, cars and toys.

To grow up and develop, like a seedling becoming a tree.

To have young, like a mother cat having kittens.

Something that makes a living thing react, such as sound, light or touch.

The reaction to a stimulus, like a mimosa closing its leaves when touched.

A machine made by people; it moves and talks but has no life.

To look carefully and pay attention to things around us.

What living things need to breathe to stay alive.

The part in the soil; it absorbs water and nutrients and holds the plant firm.

The plant's pillar; it supports the plant and carries water and nutrients.

The plant's food factory; it catches sunlight to make nutrients.

To take in water and nutrients, like roots taking in water from soil.

To hold up and keep steady, like the stem holding the plant up.

To carry water and nutrients from one place to another.

Light from the sun; leaves use it to make food.

Nourishing substances in soil that help plants grow.

Where plants root; it holds water and nutrients.

The part that reproduces a plant; in soil it can grow into a new plant.

The power to do things; animals get it from food.

To eat food for energy and nutrients.

An animal that eats plants, such as cattle and sheep.

An animal that hunts other animals, such as lions and eagles.

An animal that eats both plants and animals, such as sparrows and people.

To heal the body after injury; it needs energy and nutrients.

Something that may hurt an animal, such as an enemy coming near.

An action taken when temperature changes or danger appears, such as flying away or hiding.

The cool spot under a tree where animals rest when hot.

To stay alive by avoiding danger and finding food.

Harmful substances making air, water or land dirty.

Rubbish and dirty water making rivers and seas filthy.

Waste gases and smoke making the air dirty.

Things we throw away; they belong in bins or recycling boxes.

Used dirty water; it must not be released to the sea untreated.

To collect waste by type and remake it, like bottles becoming clothing.

The air, water, land and living things around us.

Who eats whom among living things; pollutants travel along it.

To care for and keep the environment from harm.

A shopping bag used again and again, replacing plastic bags.

An object with magnetism that attracts iron things.

The power of a magnet to attract iron objects.

To pull something close and hold it, like a magnet holding a nail.

To push something away, like two like poles pushing apart.

The two strongest ends of a magnet: north pole and south pole.

A tool with a tiny magnetic needle that shows north and south.

A metal attracted by magnets, like an iron nail.

Hard, shiny material, such as iron, copper, aluminium and silver.

A small wire loop for holding paper; magnets attract it.

The way things point, such as east, south, west and north.

To break into tiny bits spread evenly through water, like salt in water.

A white seasoning that dissolves in water and makes it salty.

A sweet seasoning that dissolves in water and makes it sweet.

Tiny grains of stone; they do not dissolve and sink in water.

A hard solid that does not dissolve in water.

To swirl a liquid with a spoon so things dissolve faster.

Water that is warm, not scalding; it dissolves things faster than cold water.

To go under the water, like sand and stones settling at the bottom.

To watch changes in an experiment carefully.

A hands-on way to find answers.

What vibrating objects make and our ears hear.

Quick back-and-forth movement, like a shaking drumhead.

How loud or soft a sound is, decided by the size of the vibration.

A big-vibration sound, like a drum struck hard.

A small-vibration sound, like a drum tapped lightly.

Sound bouncing back after hitting a wall or cliff.

A percussion instrument; its shaking head booms.

The part in the throat that vibrates to make our voice.

A stretchy loop; pluck it and it vibrates with a hum.

The ears' ability to hear; it needs protecting.

A push or pull that can move things or stop them.

Force that moves something away from you, like pushing a door.

Force that brings something towards you, like pulling a suitcase.

A change of position, like a car driving forward.

To go faster and faster, like a bicycle rolling downhill.

To go slower and slower, like a bicycle climbing uphill.

To change from moving to still, like a keeper catching a ball.

The Earth's pull that draws objects towards the ground.

To drop towards the ground, like a ball let go.

The planet we live on; it produces gravity.

The cloud, sun, rain, wind, heat and cold of a place right now.

Weather with the sun high and few clouds.

Weather with the sky full of clouds hiding the sun.

Weather with water falling from the sky; take an umbrella.

White ice crystals falling in cold places; Hong Kong winters have no snow.

Moving air; strong wind sways branches and flags.

How hot or cold the air is, measured with a thermometer.

Information telling the weather to come.

Hong Kong's department that watches the weather and issues warnings.

A fierce tropical storm of wind and rain; stay home when it hits.

Rain that falls hard and thick; take rain gear and mind slippery paths.

To move under cover away from the rain.

To change what you do as things change, like switching on a fan in heat.

Very hot weather; drink plenty and avoid long exposure to the sun.

To let body heat out, like a dog panting with its tongue out.

Water leaving the skin to cool the body in heat or exercise.

A storm with lightning and thunder; stay indoors away from metal and open ground.

To arrange ahead, like storing food and water before a typhoon.

Activities outside, such as hiking and barbecues.

Activities inside, such as reading and museum visits.

The spring, summer, autumn and winter that come round in order each year.

The warm, damp season when plants bud and bloom.

The hot, rainy season when plants grow fastest.

The cool, dry season when leaves turn colour and fruit ripens.

The cold season, when animals hibernate or migrate.

To sleep through winter on stored fat, like bears do.

To travel far for food and warmth, like birds flying south.

Birds that move with the seasons, like swallows and black-faced spoonbills.

Leaves trees drop in autumn to help them through winter.

A bushy-tailed little animal that stores food for winter.

A person who studies nature and seeks knowledge, like Zhang Heng.

A person who creates brand-new things, like Edison.

Zhang Heng's bronze instrument that showed where an earthquake struck.

When the ground shakes, which can topple buildings.

A lamp that glows with electricity, making night bright as day.

The glowing wire inside a bulb; Edison tested a thousand materials for it.

A new device or method someone creates.

To give something a go, and try another way after failing.

An attempt that did not work; it teaches us much.

Not giving up when things get hard.

To watch things and their changes carefully.

To ask why about what you observed.

A possible cause or answer, waiting to be tested.

Facts that support or overturn a guess, like measurements and records.

To test a guess with experiments or gathered facts.

To write down or photograph what you observe.

The final answer drawn from the evidence.

To look at how two things are alike or different for clues.

Something observed or changed, like leaves turning yellow.

The process of asking, testing and finding answers like a scientist.

What products are made of, such as plastic, wood, glass and metal.

A light, waterproof material for bottles and toys.

Sturdy material from trees, used for desks and chairs.

Clear, smooth material that breaks easily; used for windows and cups.

Hard, durable material that conducts heat, like iron and aluminium.

The shape and framework of a product, like an umbrella's ribs.

What a product can do, like a bottle holding water.

A design that is easy to use, durable and safe.

Colours, patterns and shapes that delight people.

The process of planning a product's look and function.