Terms for uncountable nouns: quantity versus amount

[learning54]

Hi Teachers,

To explain sentence 'a' it is appropriate to use sentence 'b', if I'm not mistaken.
a) There are a lot of books on the shelf.
b) There is a big number of books on the shelf.

Which one is most appropriate to explain sentence 'a', 'b' or 'c'?
a) There is a lot of traffic in the street.
b) There is a big quantity of traffic in the street.
c) There is a big amount of traffic on the street.

The issue is, which term is better for uncountable nouns, 'quantity' or 'amount'?

Thanks in advance

[JohnParis]

The following two sentences are fine:

There are a lot of books on the shelf.
There is a lot of traffic in the street.

"A big number of traffic, a big quantity of traffic, and a big amount of traffic" are all quite awkward and incorrect as you have used them in your examples. "A large amount of traffic..." would be preferrable, in my opinion.

[learning54]

The following two sentences are fine:

There are a lot of books on the shelf.
There is a lot of traffic in the street.

"A big number of traffic, a big quantity of traffic, and a big amount of traffic" are all quite awkward and incorrect as you have used them in your examples. "A large amount of traffic..." would be preferrable, in my opinion.

Hi John,
Thank you for your reply, and so will be 'a large number of' for 'a lot of' books?

L54

[bhaisahab]

Hi John,
Thank you for your reply, and so will be 'a large number of' for 'a lot of' books?

L54

Yes, "large" rather than "big".

[learning54]

Yes "large" rather than "big".

Hi,
Thank you vey much for your reply.

Best,
L54

[learning54]

Hi,
Are "A large quantity of traffic', and 'a big amount of traffic" interchangeable?

Thanks in advance

[Barb_D]

Hi,
Are "A large quantity of traffic', and 'a big amount of traffic" interchangeable?

Thanks in advance

Both are equally unnatural.

[bhaisahab]

Hi,
Are "A large quantity of traffic', and 'a big amount of traffic" interchangeable?

Thanks in advance

I find them both unnatural. I would say "a lot of traffic".

[5jj]

Are "A large quantity of traffic', and 'a big amount of traffic" interchangeable?

In that they both sound unnatural, yes.

[bhaisahab]

Three of us together that time.