Ques: Q: What happens to a tectonic plate when it subducts? Choices: - it warms - it cracks - it sinks - it melts A:
Ans: it melts

Ques: Q: X rays and what other type of electromagnetic wave has the shortest wavelengths and the highest frequencies? Choices: - ultraviolet rays - X-rays - plasma rays - gamma rays A:
Ans: gamma rays

Ques: Q: What item lost by diffusion and in the urine are replenished by eating? Choices: - protein - sugar - yeast - salt A:
Ans: salt

Ques: Q: What is the sum of the masses of the atoms in a molecule? Choices: - compound mass - mass effect - atomic energy - molecular mass A:
Ans:
molecular mass