The rate of solubility are NOT affected by ..

The loss of top layer of the soil is called ...

.... has higher density and will sink in the water.

An early form of fuel is ...

Light, soil, air , water are living things.

diamond, glass, ceramics, aluminium are hard materials

Flexible materials are glass and wood

Materials can be classified into 6 properties (hardness, flexibility, ductility, buoyancy, strength and resistance to water)

Why are different kinds of organisms found in different environment

Plants take in ... to make food and animals take in ... to breathe in.

The harmful gases from the vehicles are ...

The waste material from ... make the soil fertile

Volcanic eruption is both a good and bad environmental changes

Rubber is non-ductile but it is flexible material. It can bend without breaking

Carnivores eat meat and plants.

Horses, sheeps and deers are herbivores

Ductility is the ability of a material to be pulled into wires

When lava from volcanic eruption cools , it hardens to form pumice.

A material that has a lower density than water sinks on water.

Examples of fossil fuels are natural gas, coal and oil.

The object with greater mass has greater density.

Wood and plastic are examples of non-buoyant material.

Terrestrial ecosystems are ocean, pond, lake and river

Metal, glass, rubber are non-buoyant materials

Animals in savannas are butterfly, monkeys, eagle and frogs.

Water is a non - renewable resource in our environment.

Tadpoles live in ocean ecosystems

The properties of wood are buoyant, rigid, non-ductile, and non-waterproof.

Waterproof materials are metal, wood, glass, rubber and plastic.

The flexible material is...

... is the breakdown of stones, rocks and minerals over time.

The non-waterproof material is ...

Non-ductile material is ..

A group of living things of the same kind that live together and reproduce at a given place and time is called...

... show that solid mixes with the liquid, but not completely.

When the two liquids mix well, we call that immiscible liquids

The slow environmental changes are soil erosion, global warming, weathering and depletion of the ozone layer.

When fuels are burnt, ... and other harmful gases are released into the air.

... leads to soil erosion and global warming.

The effect of global warming is..

A community interacts with the non-living environment to form ...

All different populations of organisms that live together in a habitat form a ...

The aquatic ecosystem is ....

Fizzy drinks have ... dissolved in them. When the drinks become warm, they become warm and taste 'flat' because the gas escapes from the drinks.

Which of this material is rigid and waterproof?

A solid which does not dissolve in a liquid is said to be ... in the liquid

Good environmental changes are are selective planting, deforestation and weathering.

... is difficult to dissolve in water because it has high viscosity.

What should we do to make sugar and water dissolve faster?