Midterm extra credit
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Matter | is anything that has mass and takes up space
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| Atom | is the smallest part of an element that retains the properties of that element
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| Democritus | he was an early scientist that said that that if you cut up something you would eventually end up with a particle that you can not divide it farther
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| Protons | is a positive charge found with in an atomic nuclei
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| Neutrons | is a neutral charge found within an atomic nuclei
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| Electrons | is a negative charge that balances the positive charge of the protons in the atomic nuclei
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| Bohr | He was a scientist that further developed Rutherfords atomic model
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| Elements | It is a pure substance that can’t be separated into simpler substance by physical or chemical means
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| Compounds | it is a pure substance composed of two or more different elements joined together by chemical bonds. They can only be separated by chemical means, not physically
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| Mixtures | It is a combination of two or more pure substances that aren’t chemically combined
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| Heterogeneous mixtures | You can see all the parts not completely combined
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| Homogeneous mixtures | You can’t see all the parts appears the same
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| Physical change | matter changes in some way
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| Chemical change | 2 substances make new substance
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| Melting point | is the point where heat is absorbed and makes the solid into a liquid or gas
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| Boiling point | is the temp. at which a liquid boils, it will become a gas substance
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| Density | is Mass/Volume also it is a property that describes their relationship between the mass of a material and its volume
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| Dmitri Mendeleev | He made the periodic table
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| Periodic table | shows all the elements in the universe. also organizes the elements by chemical properties
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| Atomic number | number of protons
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| Symbol | is the abbreviated version of the element
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| Atomic weight | is the number of protons and neutrons in the nucleus of an atom
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| Period | Each row on the periodic table
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| Orbitals | are the pattern the electrons takes to go around the nucleus
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| Group | The elements in each group have the some number of electrons in the outer orbital
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| Families | 1A is the family made up of alkali metals 2A is made up of alkaline earth metals 7A is made up of the halogens 8A is made up of Noble gases
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| Metalloids | Have Metal and nonmetal properties Act as semiconductors Boron, Silicon, Germanium, Arsenic, Antimony, Tellurium, and Polonium are Metalloids
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| DNA | Deoxyribonucleic acid
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| Double helix | spiral shaped ladder
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| Chromosomes | When DNA comes in long strands
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| Bases | cytosine, guanine, adenine, and thymine
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| Genes | Each one of these small sections of DNA
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| Genotype | The set of genes carried by the organism
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| Phenotype | The physical expression of the gene
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| Punnett Square | A tool which uses the combination of alleles to predict the probability of traits showing up in offspring
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| Dominant trait | A trait that will always be expressed in the phenotype, Alleles for dominant traits are represented by capital letters
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| Recessive trait | A trait that will always be expressed in the phenotype if two recessive alleles are present
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| Mendel | A scientist that cross -pollinated plants for research on genetics
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| Miescher | A scientist that isolate DNA from nuclei of leukocyte
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| Heredity | The transmission of genetic characters from parents to offspring
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| Nuclein | A group of proteins, containing phosphorous, that occur in the nuclei of living cells
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| Generation | The term of years
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| Leukocytes | A colorless cell that circulates in the blood and body fluids and is involved in counteracting foreign substances and disease
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Or sort by any of the columns using the down arrow next to any column heading.
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