Choose the picture that best represents the "hydrosphere".

Earth's surface is formed by 2 processes known as ..

Diagram shows Earth's crust movement.

This is example of ...

This geohazard occurs in industrial area.

This refers to ...

This device is used to detect

This device is used to detect

The Earth is about __________yeras old.

To determine the age of the Earth, scientists measure the age of geological samples such as______, ______ and minerals

How can scientist find out the existence of the creature in the diagram?

Hot spring water will be produced if the water flows out through layers of hot rocks in the __________.

Which unplanned human activities may cause negative effects to all living things?

When the water is heated naturally by the heat from the Earth, it is caused by the process known as...

The air is made up of _____% Nitrogen.

How to test the presence of Oxygen?

How to test the presence of Hydrogen?

Oxygen helps in __________.

(more than 1 answer)

____________ helps in photosynthesis.

Plants absorb _________ and

releases _________ during photosynthesis.

Inhaled air has _________ carbon dioxide than exhaled air.

Which process does not produce Carbon dioxide?

Too much carbon dioxide in the atmosphere causes __________.

(more than 1 answer)

Plants carry out photosynthesis to produce ________ and _________.

What is this process?

Which picture represents respiration?

Carbon + Oxygen → ____________

Which fire extinguisher is suitable to put at home?

Which on is not a way to prevent fire?

Which is not the conditions of combustion?

Sulphur dioxide and Nitrogen dioxide causes ____________.

_________ causes thinning of ozone layer.

The gas is use for photosynthesis

Which of the following statement is TRUE

The gas is used to fill hot air balloons and weather balloons

the gas is used to fill the light bulb

Used in advertisement lighting

To produce carbonated drinks

Mark for steps that can be taken to prevent the distruption to the oxygen and carbon cycle

Formed from sediment deposition of rock fragments, remains of plants and animals

Caused by high temperature and pressure

Formed from cooling and solidification of magma and lava

The components interact with each other to maintain a balance of oxygen and carbon dioxide

Contains ozone and absorbs the harmful rays from the sunlight

Contains minerals that are very useful for human life

Supplies food sources such as fish, squids and shrimps

Erosion on Earth's surface by wind and water

The Earth's surface folds forming peaks and valley

Volcanic eruption

Formation of sand dunes in the desert by sand storm

Beach becomes steep due to coastal erosion

Gases that causes acid rain

Metals minerals

Non-metals minerals

Example of uses of concave mirror

Properties of light:

Light cannot penetrate opaque surface

Name the two medium where the pencil stays in.

When light enters more dense medium from a less dense medium at an angle, the light ______ the normal line

When light enters less dense medium from a denser medium at an angle, the light ______ the normal line

Subtraction of colour is the process of ____ of light by coloured filter

For the plane mirror, the image size is equal to the size of the object.

For a plane mirror, the distance of the image formed is closer than the distance of the object from mirror

Refraction of light occurs when light travels through two mediums of ____ densities

Light rays refracted ____ the normal when it travels from a less dense medium to a denser medium.

Light rays refracted ____ the normal when it travels from a denser medium to a less dense medium.

Natural phenomena caused by scattering of light