Q: The rock of the mantle is mostly what? Read this paragraph and choose the correct option from the provided answers: The rock of the mantle is mostly peridotite. Peridotite is formed of crystals of olivine (green) and pyroxene (black). Choices: - metamorphic - crystalline - silicon - peridotite A:
peridotite

(Question)
Q: Both alpha and beta decay change the number of what in an atom's nucleus? Read this paragraph and choose the correct option from the provided answers: Both alpha and beta decay change the number of protons in an atom's nucleus, thereby changing the atom to a different element. In alpha decay, the nucleus loses two protons. In beta decay, the nucleus either loses a proton or gains a proton. In gamma decay, no change in proton number occurs, so the atom does not become a different element. Choices: - neutrons - Gamma decay - electrons - protons A:
(Answer)
protons

Ques: Q: What is the movement of animals from one place to another? Read this paragraph and choose the correct option from the provided answers: Another example of a behavior with a yearly cycle is migration . Migration is the movement of animals from one place to another. Migration is an innate behavior that is triggered by changes in the environment. For example, animals may migrate when the days get shorter in the fall. Migration is most common in birds, fish, and insects. In the Northern Hemisphere, many species of birds, including robins and geese, travel south for the winter. They migrate to areas where it is warmer and where there is more food. They return north in the spring. A flock of migrating geese is pictured below ( Figure below ). Choices: - communication - trade - population - migration A:
Ans: migration

(Q).
Q: What are the key cells in the immune response? Read this paragraph and choose the correct option from the provided answers: Lymphocytes are the key cells in the immune response. They are leukocytes that become activated by a particular antigen. There are two major type of lymphocytes: B cells and T cells. Choices: - keratinocytes - erythrocytes - leukocytes - lymphocytes A:
(A).
lymphocytes

Ques:Q: Glass, rubber, and plastics are examples of which type of solids? Read this paragraph and choose the correct option from the provided answers: Examples of amorphous solids include glass, rubber, and plastics. Choices: - dubious - aqueous - porous - amorphous A:

Ans:amorphous

Ques: Q: What is a popular treatment for kidney failure? Read this paragraph and choose the correct option from the provided answers: Uncontrolled diabetes may damage capillaries of nephrons. As a result, the kidneys lose much of their ability to filter blood. This is called kidney failure . The only cure for kidney failure is a kidney transplant, but it can be treated with dialysis. Dialysis is a medical procedure in which blood is filtered through a machine (see Figure below ). Choices: - psychotherapy - metastasis - electrolysis - dialysis A:
Ans:
dialysis