You can use the word quality relating to observations, or quantum (I'm doing a project on the scientific ABC's for my end of the year 6th grade project).
Quartz and quantum theory are science words. They begin with the letter Q.
Quantum theory is a science word. It begins with the letter Q.
There are hundreds of words that start with the letter j. There are less than 6 words that end with the letter q. There are no words that start with j and end with q.
Quartz
quantum physics
Quadriplegia, quanta, quesadilla and quota are words that start with q. They end with the letter a.
There are no words that start with p and end with q. Suq, tranq and umiaq are the only words that end with the letter q.
Quit and qats (qat evergreen shrubs) are four letter word that start with q and ends with t. There are no four letter words that start with t and end with q.
QuartQuiteQuiltQuote
Qis
Some 10 letter words that start with Q are:quadranglequaintnessquantifierqueasinessquesadillaquintupletquirkiness
Words for things you can draw that start with the letter Q are:quarterqueenquestion markquichequilt