Q: Q: What item starts puberty in girls? Choices: - the ovary - the uterus - the thyroid - the hypothalamus A:
A: the hypothalamus

Q: Q: Ions that contain fewer electrons than protons have a net positive charge and are called what? Choices: - oxides - particles - anions - cations A:
A: cations

Q: Q: The phase transition of a substance changing from a liquid state to a gaseous state is an example of what? Choices: - trichina - spirogyra - catostrophy - entropoy A:
A: entropoy

Q: Q: What happens to the density of air as the altitude decreases? Choices: - multiplies - remains the same - increases - decreases A:
A: decreases