Q: What is the basic structure that holds plants upright, allowing plants to get the sunlight and air they need? Read this paragraph and choose the correct option from the provided answers: Stems are organs that hold plants upright. They allow plants to get the sunlight and air they need. Stems also bear leaves, flowers, cones, and smaller stems. These structures grow at points called nodes. The stem between nodes is called an internode. (See Figure below . ). 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? Read this paragraph and choose the correct option from the provided answers: A physical change is a change in one or more physical properties of matter without any change in chemical properties. In other words, matter doesn't change into a different substance in a physical change. Examples of physical change include changes in the size or shape of matter. Changes of statefor example, from solid to liquid or from liquid to gasare also physical changes. Some of the processes that cause physical changes include cutting, bending, dissolving, freezing, boiling, and melting. Four examples of physical change are pictured in the Figure below . You can learn more about physical changes and why they occur by watching the video at this URL:. 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? Read this paragraph and choose the correct option from the provided answers: The first continents were small but they grew over time. Supercontinents have formed at least five 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? Read this paragraph and choose the correct option from the provided answers: Ionic bonding typically occurs when it is easy for one atom to lose one or more electrons and another atom to gain one or more electrons. However, some atoms won't give up or gain electrons easily. Yet they still participate in compound formation. How? There is another mechanism for obtaining a complete valence shell: sharing electrons. When electrons are shared between two atoms, they make a bond called a covalent bond. Let us illustrate a covalent bond by using H atoms, with the understanding that H atoms need only two electrons to fill the 1s subshell. Each H atom starts with a single electron in its valence shell:. 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? Read this paragraph and choose the correct option from the provided answers: A newborn baby has a soft spot on the top of its head. Over the next few months, the soft spot gradually hardens. What explains this?. 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? Read this paragraph and choose the correct option from the provided answers: 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 phases of matter. A solid has a definite shape and a definite volume. Liquids ordinarily have a definite volume but not a definite shape; they take the shape of their containers. Gases have neither a definite shape nor a definite volume, and they expand to fill their containers. We encounter matter in each phase every day; in fact, we regularly encounter water in all three phases: ice (solid), water (liquid), and steam (gas). We know from our experience with water that substances can change from one phase to another if the conditions are right. Typically, varying the temperature of a substance (and, less commonly, the pressure exerted on it) can cause a phase change, a physical process in which a substance goes from one phase to another (Figure 1.4 "Boiling Water"). Phase changes have particular names depending on what phases are involved, as summarized in Table 1.1 "Phase Changes". Table 1.1 Phase Changes. Choices: - phases of mass - types of atoms - forms of substances - phases of matter A:
(A).
phases of matter