Q: Urea and carbon dioxide are molecules with how many carbon atoms? Choices: - even number - four - two - one A:
one

(Question)
Q: How many dimensions can humans see in? Choices: - five - two - one - three A:
(Answer)
three

Ques: Q: Quarks also have a different type of charge, called what? Choices: - contrast charge - pure charge - spontaneous charge - color charge A:
Ans: color charge

(Q).
Q: What is the modern periodic table based on? Choices: - element mass - metallic number - element density - atomic number A:
(A).
atomic number

Ques:Q: Compared with the molecules of many other substances, molecules of water are strongly attracted to what? Choices: - hydrogen - helium - nothing - each other A:

Ans:each other

Ques:Q: Any structure inside a cell that is enclosed by a membrane is called? Choices: - an article - a particle - an enclave - an organelle A:

Ans:
an organelle