Q: What is the basic structure that holds plants upright, allowing plants to get the sunlight and air they need? Choices: - twig - stamen - root - stem A:
stem

Q: A change in one or more physical properties of matter without any change in chemical properties is called what? Choices: - negative change - positive change - atmospheric change - physical change A:
physical change

Q: Q: Supercontinents have formed at least how many times in earth history? Choices: - twenty - nine - two - five A:
A: five

Question: Q: When electrons are shared between two atoms, they make a bond called a what? Choices: - metallic bond - ionic bond - hydrogen bond - covalent bond A:
Answer: covalent bond

*Question*
Q: A newborn baby has a soft spot on the top of its head. over the next few months, the soft spot gradually does what? Choices: - weakens - grows - shrinks - hardens A:
**Answer**
hardens

(Q).
Q: Another way to classify matter is to describe it as a solid, a liquid, or a gas, which was done in the examples of solutions. these three descriptions, each implying that the matter has certain physical properties, represent the three of these? Choices: - phases of mass - types of atoms - forms of substances - phases of matter A:
(A).
phases of matter