Weight and Mass

Dear all,

Here are today's main learning points:

English

We finished up with the comprehension open-ended section in which we went through the pre-reading thinking activity again and read through the passage for deeper understanding.

Please note the difference between a word, phrase and sentence.

When asked to quote a word, take note of the punctuation too.
e.g The word is "excited".

Phrase is part of a sentence, not a word or whole sentence.

We also discussed about the synthesis and transformation structure of using who, which and whom.

• who - Used as a pronoun to talk about a subject (PERSON) before the word 'who'.

e.g I met Peter who is the director of that company.

Peter is the subject (person) used before the word 'who'.

• which - Used as a pronoun to talk about a subject (Animal, insects, non living objects) before the word 'whom'.

e.g The snake is a type of animal which crawls along the ground.

Animal is the subject (animal) used before the word 'which'.

• whom - used as a pronoun to separate a subject (person) before and after the word 'whom'.

e.g He is the man whom my mother often talks about.

man (subject - person) whom my mother (subject - person)
whom separates both the subject (person).

Rule: subject (person) whom subject (person)

Science

We move on to talk about the difference between mass and weight from the continuation of the last topic on gravity. Gravity is the force that pulls all objects down to the centre of the earth. Weight is the amount of gravity that pulls an object down. Mass is the amount of matter in the object itself.

Please note the difference of mass and weight as found in your textbook table. It is important.

Weight changes at different places depending on the amount of gravity but mass is constant no matter where we are. Take for example, a football on the moon weighs lesser than on earth because the amount of gravity is lower. But on earth, it weighs heavier because the amount of gravity pulling it down is greater.

Weight is a force but matter is not a force.

Thank you,
Sincerely,
Mr Nelson Ong