Answer the following question given this paragraph: Heats of reaction are typically measured in kilojoules. It is important to include the physical states of the reactants and products in a thermochemical equation as the value of the depends on those states. Q: What units are typically used to measure heats of reaction? Choices: - degrees Celsius - volts - kilobytes - kilojoules A:
kilojoules
Answer the following question given this paragraph: An estuary is a partly enclosed coastal body of water with one or more rivers or streams flowing into it, and with a free connection to the ocean. Estuaries can be thought of as the most biologically productive regions on Earth, with very high biodiversity. Estuaries are zones where land and sea come together, and where fresh and salt water meet. Q: What can be thought of as the most biologically productive regions on earth? Choices: - swamps - forests - coasts - estuaries A:
estuaries
Q: Answer the following question given this paragraph: An addition reaction is a reaction in which an atom or molecule is added to an unsaturated molecule, making a single product . An addition reaction can be thought of as adding a molecule across the double or triple bond of an alkene or alkyne. Addition reactions are useful ways to introduce a new functional group into an organic molecule. Q: What is a reaction in which an atom or molecule is added to an unsaturated molecule, making a single product? Choices: - complete reaction - homeostasis - single reaction - an addition reaction A:
A: an addition reaction
Question: Answer the following question given this paragraph: The head of the sperm contains the nucleus. The nucleus holds the chromosomes. In humans, the nucleus of a sperm cell contains 23 chromosomes. The acrosome on the head contains enzymes that help the sperm penetrate an egg. Q: The head of the sperm contains what, which holds the chromosomes? Choices: - nerve cells - fiber - eggs - nucleus A:
Answer: nucleus
*Question*
Answer the following question given this paragraph: When physical or chemical changes occur, they are generally accompanied by a transfer of energy. The law of conservation of energy states that in any physical or chemical process, energy is neither created nor destroyed. In other words, the entire energy in the universe is conserved. In order to better understand the energy changes taking place during a reaction, we need to define two parts of the universe, called the system and the surroundings. The system is the specific portion of matter in a given space that is being studied during an experiment or an observation. The surroundings is everything in the universe that is not part of the system. In practical terms for a laboratory chemist, the system is the particular chemicals being reacted, while the surroundings is the immediate vicinity within the room. During most processes, energy is exchanged between the system and the surroundings. If the system loses a certain amount of energy, that same amount of energy is gained by the surroundings. If the system gains a certain amount of energy, that energy is supplied by the surroundings. Q: Physical or chemical changes are generally accompanied by a transfer of what? Choices: - shape - pressure - color - energy A:
**Answer**
energy
(Q).
Answer the following question given this paragraph: There must be more to this story than just gas exchange with the environment. To begin to appreciate the role of oxygen inside your body, think about when your breathing rate increases: climbing a steep slope, running a race, or skating a shift in a hockey game. Respiration rate correlates with energy use, and that correlation reflects the link between oxygen and energy metabolism. For this reason, the chemical process inside your cells that consume oxygen to produce usable energy is known as cellular respiration . During this process, energy is converted from glucose , in the presence of oxygen, into numerous ATP molecules. The glucose, of course, comes from the food you eat. In biological terms, you do not eat because you are hungry, you eat to get energy. Other heterotrophic organisms also acquire glucose from other organisms, whereas autotrophic organisms make their own glucose, mostly through photosynthesis. Q: Respiration rate correlates with what? Choices: - size - heat - pressure - energy use A:
(A).
energy use