Answer the following question given this paragraph: In the modern periodic table, elements are organized by atomic number. The atomic number is the number of protons in an atom of an element. This number is unique for each element, so it seems like an obvious way to organize the elements. (Mendeleev used atomic mass instead of atomic number because protons had not yet been discovered when he made his table. ) In the modern table, atomic number increases from left to right across each period. It also increases from top to bottom within each group. How is this like Mendeleev's table?. Q: What is the atomic number? Choices: - Number of electrons - Speed of electrons - Number of neutrons - number of protons A:
number of protons
Answer the following question given this paragraph: Mutation creates new genetic variation in a gene pool. It is how all new alleles first arise. In sexually reproducing species, the mutations that matter for evolution are those that occur in gametes. Only these mutations can be passed to offspring. For any given gene, the chance of a mutation occurring in a given gamete is very low. Thus, mutations alone do not have much effect on allele frequencies. However, mutations provide the genetic variation needed for other forces of evolution to act. Q: What phenomenon, crucial for evolution, creates new genetic variation in a gene pool and is how all new alleles first arise? Choices: - radiation - natural selection - adaptation - mutation A:
mutation
Q: Answer the following question given this paragraph: The speed of most waves depends on the medium through which they are traveling. Generally, waves travel fastest through solids and slowest through gases. That's because particles are closest together in solids and farthest apart in gases. When particles are farther apart, it takes longer for the energy of the disturbance to pass from particle to particle. Q: Do waves move faster when particles are close to each other or far away? Choices: - unaffected - far away - open - close A:
A: close
Question: Answer the following question given this paragraph: The two materials do have at least one thing in common. The atoms in the materials are held together by covalent bonds. These bonds consist of electrons shared between two or more atoms. Unlike ionic bonds, where electrons are either lost or gained by an atom to form charged ions, electrons in covalent compounds are shared between the two atoms, giving rise to properties that are quite different from those seen in ionic materials. Q: Electrons in covalent compounds are shared between the two atoms, unlike the case in what type of bonds? Choices: - horizontal bonds - weak bonds - soluble bonds - ionic bonds A:
Answer: ionic bonds
*Question*
Answer the following question given this paragraph: Organisms are highly organized, coordinated structures that consist of one or more cells. Even very simple, single-celled organisms are remarkably complex: inside each cell, atoms make up molecules; these in turn make up cell organelles and other cellular inclusions. In multicellular organisms (Figure 1.10), similar cells form tissues. Tissues, in turn, collaborate to create organs (body structures with a distinct function). Organs work together to form organ systems. Sensitivity or Response to Stimuli. Q: Organisms are highly organized, coordinated structures that consist of one or more what? Choices: - nucleus - proteins - lipids - cells A:
**Answer**
cells
Q: Answer the following question given this paragraph: Like Earth, the Moon has a distinct crust, mantle, and core. The crust is composed of igneous rock. This rock is rich in the elements oxygen, silicon, magnesium, and aluminum. On the near side, the Moon's crust is about 60 kilometers thick. On the far side, the crust is about 100 kilometers thick. The mantle is made of rock like Earth's mantle. The Moon has a small metallic core, perhaps 600 to 800 kilometers in diameter. The composition of the core is probably mostly iron with some sulfur and nickel. We learned this both from the rock samples gathered by astronauts and from spacecraft sent to the Moon. Q: Like earth, the moon has a distinct crust, mantle, and what else? Choices: - temperature - polarity - atmosphere - core A:
A: core