Grade 3 Discover : Set 12 Copy
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These are not gemstones!
This is a microscopic image of loose grain-like structure, that is pale yellowish brown in colour.
It is commonly found on beaches.
What are we talking about?
An object is made of a mixture of loam, mud, sand and water mixed with a binding material such as rice husks or straw.
These are usually air-dried, but in warm regions it is sun-dried.
What object used in construction are talking about?CorrectIncorrect
Alluvium consists of silt, sand, clay, and gravel and can hold plenty of water.
Alluvium is material deposited by rivers.
Which crop that can be used as a natural glue when boiled is this?CorrectIncorrect
Also called Paddy.
When this natural phenomenon occurs and hit a sandy beach, it fuses the sand into glass.
What natural phenomena which contains huge amounts of electricity and heat is this?CorrectIncorrect
In steep and hilly areas, water from rain starts moving at a high speed.
When it moves through the soil the plants without a strong root foundation get uprooted.
The smaller the size of each soil particle the more easily this occurs.
What are we talking about?CorrectIncorrect