Q: The rock of the mantle is mostly what? Choices: - metamorphic - crystalline - silicon - peridotite A:
peridotite

(Question)
Q: Both alpha and beta decay change the number of what in an atom's nucleus? Choices: - neutrons - Gamma decay - electrons - protons A:
(Answer)
protons

Ques: Q: What is the movement of animals from one place to another? Choices: - communication - trade - population - migration A:
Ans: migration

(Q).
Q: What are the key cells in the immune response? Choices: - keratinocytes - erythrocytes - leukocytes - lymphocytes A:
(A).
lymphocytes

Ques:Q: Glass, rubber, and plastics are examples of which type of solids? Choices: - dubious - aqueous - porous - amorphous A:

Ans:amorphous

Ques: Q: What is a popular treatment for kidney failure? Choices: - psychotherapy - metastasis - electrolysis - dialysis A:
Ans:
dialysis