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IVY TECH APHY 101 MIDTERM CHAPTERS 1 - 6
QUESTIONS AND ANSWERS 2024 -2025 LATEST 100%
VERIFIED ANSWERS
Define Matter? - ANSWER>>Matter-Anything that has mass and takes up space
Element? - ANSWER>>A substance that cannot be broken down into simpler substances by chemical means.
Atom? - ANSWER>>The smallest particle that exhibits the chemical properties of an element
What is the basic unit of matter? - ANSWER>>Atom
What is the structure of an atom? - ANSWER>>Protons and neutrons
Define nucleus. - ANSWER>>Nucleus-it carries DNA it is responsible for reproduction and making protein; it also has two layers
Proton? - ANSWER>>Positive charged elementary particle.
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2 Neutron? - ANSWER>>Same as proton with no charge.
Electron? - ANSWER>>A subatomic particle that has a negative charge
What are covalent, ionic and hydrogen bonds? What are the differences among the three? - ANSWER>>Covalent- when atoms share electrons
Ionic-when cations and anions bind together
hydrogen-A weak attraction formed when a hydrogen atom of one molecule is attracted to a slightly negative atom within either the same molecule or a different molecule
Define synthesis, decomposition and exchange reactions. - ANSWER>>Synthesis-The production of chemical compounds by reaction from simpler materials
Decomposition-The breakdown is the separation of a chemical compound into elements of simpler compounds
Exchange-a chemical reaction in which both synthesis and decomposition occur, chemical bonds are both formed and broken, and chemical energy is absorbed, stored, and released 2 / 4
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What is a reactant? A Product? - ANSWER>>Reactant-A substance that takes part in and undergoes change during a reaction
Product-The substances that result from this recombination of atoms
Define catalyst. - ANSWER>>a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change.
What happens and what is produced when salt dissolve in water? - ANSWER>>Water dissolves salt because the negative part of a water molecule, the oxygen part, is attracted to the positive part of the salt, the sodium part. The positive part of the water molecule, the hydrogen part, is attracted to the negative part of the salt, the chlorine part. Dissolving happens when the attractions between the water molecules and the sodium chloride ions overcome the attraction of the ions to each other, causing the ions to separate from each other and mix into the water.
What is an acid? A base? - ANSWER>>Acid-An electrolyte that dissociates into a hydrogen ion (H+) and an anion pH of <7
Base- Substances that combine with H+ and make a solution less acidic. Represented by OH- >7 3 / 4
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What is the pH scale? What ions are involved in the pH scale? - ANSWER>>A unit of measurement that indicated how many H+ ions are in a solution hydrogen ions
What is the difference between an organic molecule and an inorganic molecule? - ANSWER>>Organic-Molecule containing carbon atoms; carbs, proteins, lipids What is the difference between anatomy and physiology? - ANSWER>>Anatomy is the study of structure of body parts/Physiology is the study of function of body parts
What are the levels of organization? Define each. - ANSWER>>Organelles, cells, tissues, organs, and organ systems
What are the characteristics of life? Define each. - ANSWER>>Movement, Responsiveness, Growth, Reproduction, Respiration, Digestion, Absorption, Circulation, Assimilation, Excretion.
What are the requirements of life? Why is each important? - ANSWER>>Water, food, oxygen, heat and pressure
Define homeostasis. - ANSWER>>The body's ability to keep its internal conditions stable, so that it's cells can survive.
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