Answer the following question given this paragraph: Covalent bonds form because they give atoms a more stable arrangement of electrons. Look at the hydrogen atoms in Figure above . Alone, each hydrogen atom has just one electron. By sharing electrons with another hydrogen atom, it has two electrons: its own and the one in the other hydrogen atom. The shared electrons are attracted to both hydrogen nuclei. This force of attraction holds the two atoms together as a molecule of hydrogen. Q: What bonds form because they give atoms a more stable arrangement of electrons? Choices: - Hydrogen bond - Ionic bond - Polar bond - covalent A:
covalent
(Question)
Answer the following question given this paragraph: Q: Physical and chemical differences help ecologists distinguish between freshwater and marine types of what? Choices: - cities - habitats - microbiomes - biomes A:
(Answer)
biomes
Ques: Answer the following question given this paragraph: The first amino acid to be isolated was asparagine in 1806. It was obtained from protein found in asparagus juice (hence the name). Glycine, the major amino acid found in gelatin, was named for its sweet taste (Greek glykys, meaning "sweet"). In some cases an amino acid found in a protein is actually a derivative of one of the common 20 amino acids (one such derivative is hydroxyproline). The modification occurs after the amino acid has been assembled into a protein. Q: What was the first amino acid to be isolated? Choices: - histamine - histon - glutathione - asparagine A:
Ans: asparagine
(Q).
Answer the following question given this paragraph: The axes of rotation of the planets are mostly nearly perpendicular to the orbital plane. Q: How do planets usually rotate to their orbital planes? Choices: - exactly perpendicular - chaotic - randomly - nearly perpendicular A:
(A).
nearly perpendicular
Ques:Answer the following question given this paragraph: If you look at your hand, what do you see? Of course, you see skin, which consists of cells. But what are skin cells made of? Like all living cells, they are made of matter. In fact, all things are made of matter. Matter is anything that takes up space and has mass. Matter, in turn, is made up of chemical substances. In this lesson you will learn about the chemical substances that make up living things. Q: What term is used to describe anything that takes up space and has mass? Choices: - size - weight - opacity - matter A:

Ans:matter
Question: Answer the following question given this paragraph: Example 2.17 Determining Average Velocity from a Graph of Displacement versus Time: Jet Car Find the average velocity of the car whose position is graphed in Figure 2.47. Strategy The slope of a graph of x vs. t is average velocity, since slope equals rise over run. In this case, rise = change in displacement and run = change in time, so that. Q: In a displacement graph, the slope of the line is the average what? Choices: - direction - speed - time - velocity A:
Answer:
velocity