Difference between look and appear

[Sameer]

Test No. incompl/elem-22 "Weather Forecast", question 2

Yes, thank you and I'm afraid it's not ......... very bright at the moment.

(a) seeming
(b) appearing
(c) seeing
(d) looking

Test No. incompl/elem-22 "Weather Forecast", answer 2

Yes, thank you and I'm afraid it's not looking very bright at the moment.

Correct answer: (d) looking

Your answer was: incorrect
Yes, thank you and I'm afraid it's not appearing very bright at the moment.
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what is the difference between the two:appearing and looking

[Alan]

Appear is another word for seem - something which shows itself gradually/slowly can appear. The sun appears over the horizon and note the opposite: disappear.

Look is more direct and explains something which you can see immediately.
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English as a Second Language
You can read my ESL story Cool Expressions