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Science 9 Review A (1 of 2)

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3.measures the percent of hydrogen ions in a solution, tells us if the substance is acidic or basic
5.famous Russian scientist credited with developing the modern periodic table
6.cell division, each cell makes a copy of itself resulting in two daughter cells that are both identical to the one parent
9.these sheets give a lot of detailed information on chemicals
11.the gene that wins or overpowers the other one if two opposite-acting alleles are inherited
14.melting of ice is this kind of change, because the substance is not chemically changed and the process is "reversible"
15.an atom that has had electrons added or removed, it carried a charge
17.this kind of cell is a package of chemicals designed to produce electricity
18.the cleaned water coming out of a sewage treatment plant
19.humans have 23 pairs of these, they look like "X"s in the pictures and they contain DNA
20.special kind of cell division that is involved in sexual reproduction
23.reactants are written on the left and these are written on the right of a chemical equation
28.C6H12O6; a very important organic compound that is made by plants
29.this type of molecules usually does not have carbon (there are some exceptions, like CO2)
30.small segment of DNA, located at a specific place on a chromosome
31.all ionic compounds are in this state at room temperature (they also conduct electricity when in solution)
32.the number of protons in a Chlorine atom
36.the number of electrons in a Chlorine ion
37.organic molecules are based on this element
38.a form of a gene
39.the vertical columns in the periodic table are called these, aka families
Down
1.system of warning labels on hazardous materials
2.more than one electrochemical cell
4.measured in Ohms, measure of how hard it is for electrons to flow through
7.this kind of electricity cannot run an electrical device because it cannot supply a continuous flow of electrons
8.all of the variation of life on Earth
10.the use of living things to make different kinds of products or tools, includes genetic engineering, in vitro fertilization, and GMOs
12.a reaction that releases heat or energy
13.this is measured in atomic mass units, or "amu" (2 words)
14.type of circuit where the current has two or more complete paths
16.the names for these compounds always indicate how many of each atom is present in the molecule
19.this type of variation involves a range of possible values, such as size or height
21.pH less than this is acidic, more than this is basic
22.this kind of reproduction requires only one parent, and all offspring are identical to that parent
24.corrosion and combustion reactions both require this as a reactant
25.the horizontal rows in the periodic table are called these
26.this type of variation has only a few options, no in-betweens, such as ability to roll your tongue
27.sex cells, there are two types (sperm and ova)
33.contains protons and neutrons, found at the center of the atom
34.type of circuit with one big loop, any devices powered must share the current going through
35.these compounds always contain a metal

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