(Q).
Q: What were the first animals to have true lungs and limbs for life on land? Choices: - birds - mammals - reptiles - amphibians A:
(A).
amphibians

(Q).
Q: What kind of scientists measure percentages of sand, silt, and clay? Choices: - texture scientists - amount scientists - petro scientists - soil scientists A:
(A).
soil scientists

(Q).
Q: Einstein's equation helps scientists understand what happens in nuclear reactions and why they produce so much what? Choices: - light - food - hydrogen - energy A:
(A).
energy