>>>>Hi everybody,
>>>>
>>>>I am trying to help my son in 5th grade and can not figure this out.
>>>>
>>>>He has the following words:
>>>>
>>>>accomplice, exultant, remorseless, sedate, apprehension, ponderous, revulsion.
>>>>
>>>>And we need to figure out this sentence:
>>>>
>>>>Sweet is to sour as ... is to light.
>>>>
>>>>We figured out all other examples, but this one I can not understand using the words I listed. I've checked each word in the dictionary as they are not easy to me as well.
>>>>
>>>>Thanks in advance.
>>>
>>>Try ponderous.
>>
>>That's what we used as well by the exclusion method, but can you explain the logic?
>
>One of the definitions of ponderous is
>"of great weight; heavy; massive."

I was thinking of a light as a sun light (color), I didn't think about it as a mass. Thanks for the explanation, shows you need to consider all definitions of the light as well.

pon·der·ous
ˈpänd(ə)rəs/
adjective
slow and clumsy because of great weight.
"her footsteps were heavy and ponderous"
synonyms: clumsy, heavy, awkward, lumbering, slow, cumbersome, ungainly, graceless, uncoordinated, blundering; More
antonyms: light, graceful
dull, laborious, or excessively solemn.
"Liz could hardly restrain herself from finishing all his ponderous sentences"
synonyms: labored, laborious, awkward, clumsy, forced, stilted, unnatural, artificial; More

The word "Light" has many meanings and I have to scroll down for the adjective:

http://www.yourdictionary.com/light