Answer the following question given this paragraph: Heat and light are forms of energy. Other forms are chemical and electrical energy. Energy can't be created or destroyed. It can change form. For example, a piece of wood has chemical energy stored in its molecules. When the wood burns, the chemical energy changes to heat and light energy. Q: How do plants support themselves above the ground to get light and oxygen? Choices: - momentum - flaccid stems - symbiosis - stiff stems A:
stiff stems

Answer the following question given this paragraph: Ionic bonding. Ionic bonds result from electrostatic attractions between positively and negatively charged side chains of amino acids. For example, the mutual attraction between an aspartic acid carboxylate ion and a lysine ammonium ion helps to maintain a particular folded area of a protein (part (a) of http://catalog. flatworldknowledge. com/bookhub/reader/2547 - gob-ch18_s04_s01_f05). Saylor URL: http://www. saylor. org/books. Q: Ionic bonds are what kind of attraction between ions? Choices: - kinetic - magnetic - nuclear - electrostatic A:
electrostatic

Answer the following question given this paragraph: lava flows from a volcano and hardens into rock. Q: Lava flows from a volcano and hardens into what? Choices: - life - snow - sand - rock A:
rock

Answer the following question given this paragraph: The concentration of a solution represents the percentage of the solution that is the solute. You can calculate the concentration of a solution using this formula:. Q: What does the concentration of a solution represent? Choices: - spending of solute - the darkness - the percentage of contaminates - percentage of solute A:
percentage of solute