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BioTest Ch.1&2
| Question | Answer |
|---|---|
| What are the metric system units for length? | Meters, centimeters, millimeters, and kilometers. |
| What are the metric system units for mass? | Grams, kilograms, milligrams, and tons. |
| What are the metric system units for volume? | Liters, milliliters, and cubic centimeters. |
| What is the metric system unit for temperature? | Degrees celcius. |
| What are the parts of the atom? | Protons, neutrons, electrons, and the nucleus. |
| Where is the nucleus in an atom? | In the center. |
| Where are the electrons in an atom? | Surrounding the nucleus. |
| When are ions formed? | When an atom gains or loses an electron. |
| What electrons are the only ones involved in being transferred in or out, or shared-involved in bonding? | Valence electrons. |
| What are the two types of bonds? | Ionic and covalent. |
| How is an ionic bond formed? | When one or more electrons are transformed from one atom to another. |
| how is a covalent bond formed? | When electrons are shared between atoms. |
| What happens during a chemical reaction? | Bonds are broken and new bonds are formes. |
| How do you get a positive ion? | When an atom loses an electron. |
| How do you get a negative ion? | When an atom gains an electron. |
| What is a mixture? | A material composecd of two or more elements or compounds that are physically mixed together but not chemically combined. |
| What is a solution? | An evenly distributed mixture. |
| What is a suspension? | A mixture of non-dissolved material and water. |
| What is a compound? | A substance formed by the chemical combination of two or more elements in definite proportions. |
| What is an element? | A substance that consists of entirly one type of atom. |
| What is an isotope? | Atoms of the same element that differ in the number of neutrons they contain. |
| What is a solute? | The substance that is dissolved. |
| What is a solvent? | The substance in which the solute dissolves. |
| What is the most abundant compound in living things? | Water |
| What is a compound light microscope? | A microscope that allows light to pass through the specimen and uses two lenses to form an image. |
| What is an electron microscope? | A microscope that uses beams of electrons to form an image. |
| How many variables are tested at a time in a controlled experiment? | One |
| What is the dependant variable? | Factor that changes. |
| Where is the dependant variable located on a graph? | On the y-axis. |
| What is the independant variable? | Factor that stays the same. |
| Where is the independant variable located on a graph? | On the x-axis. |
| What are the 8 characteristics of living things? | Made of cells, reproduce, based on universal genetic code, grow and develop, obtain and use materials and energy, respond to environment, mantain stable internal environment, and aas a group change over time. |
| What is the charge of a neutron? | Neutral. |
| What is the charge of a proton? | Positive. |
| What is the charge of an electron? | Negative. |
| What forms can chemical reactions release energy? | Light, sound, heat. |
| What is an ion? | Positive or negative charged atom. |
| What is an enzyme? | Protein that acts as a biological catalyst. |
| What is a catalyst? | Substance that speeds up the rate of a chemical reaction. |
| Where is a reactant located? | Entering into a chemical reaction. |
| Where is a product located? | Produced by a chemical reaction. |
| What is a monosaccharide? | Single sugar molecules. |
| What is a polysaccharide? | Large molecules formed from monosaccharides. |
| What is activation energy? | Energy needed for a chemical reaction. |
| What is the main source of energy for living things? | Carbohydrates. |
| What is an ecosystem? | Community and its nonliving surrpoundings. |
| What is a population? | Group of organisms of one type that live in the same area. |
| What is a biosphere? | The part of the earth that contains all ecosystems. |
| What is cell fractionation? | Technique of seperating cells into different parts. |
| What chemical bond is the weakest? | Hydrogen bond. |
| What is the strongest chemical bond? | Ionic bond. |
| What is an acid? | A compound that forms from hydrogen ions in a solution. |
| What is a base? | A compound that produces hydroxide ions in a solution. |
| What does a chemical reaction change? | Composition. |
| Does a physical reaction change composition? | No. |
| What are macromolecules? | Giant molecules. |
| What are the two types of macromolecules? | Monomers and polymers. |
| What is an atom? | Basic unit of matter. |
| What does saturated mean? | When fatty acids contain the max number of hydrogen atoms. |
| What does unsaturated mean? | When there is at least one carbon-carbon double bond in a fatty acid. |
| What is the hypothesis? | Possible answer to a scientific question. |
| What are the two types of variables? | Independant and dependent. |
| What is the conclusion? | Answer to wether the hypothesis is correct or not. |
| What is a theory? | A well-tested explanation that unifies a broad range of observations. |
| What did Redi test? | Spontaneous generation. |
| What was Redi's experiment? | Flies, meat and gauze. |
| What was Needham's experiment? | Gravy. |
| What was Spallanzani's eperiment? | Gravy. |
| What are enzymes made of? | Proteins. |
| What is quantitative data? | Numbers, obtained by counting or measuring. |
| What is qualitative data? | Descriptive and involves characteristics, can't be counted. |
Created by:
emuller896
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