Q: The periodic table of elements is divided into what? Choices: - patterns - spheres - groups - squares A:
squares

(Question)
Q: Why do birds need a light-weight body? Choices: - for cooling - water flotation - food shortages - to stay aloft A:
(Answer)
to stay aloft

Ques: Q: Which theory describes the distribution of electrons in molecules in much the same way that the distribution of electrons in atoms is described using atomic orbitals? Choices: - molecular distribution theory - atomic orbital theory - atomic distribution theory - molecular orbital theory A:
Ans: molecular orbital theory

(Q).
Q: Prosimians are thought to be more similar to the earliest of these? Choices: - rodents - fish - insects - primates A:
(A).
primates

Ques:Q: What powerful microscopes use a beam of subatomic particles instead of a beam of light? Choices: - complex microscopes - scientific microscopes - nuclear microscopes - electron microscopes A:

Ans:electron microscopes

Ques: Q: What occurs when there is little to no rain in a period of time? Choices: - pollution - hurricanes - floods - droughts A:
Ans:
droughts