Science Crossword
                                                   
                                                   
                                                   
                                                   
                                                   
                                                   
                                                   
                                                   
                                                   
                                                   
                                                   
                                                   
                                                   
                                                   
                                                   
                                                   
                                                   
                                                   
                                                   
                                                   
                                                   
                                                   
                                                   
                                                   
                                                   
                                                   
                                                   
                                                   
 
 
Down: 1) a chemical in food used for energy growth, body building or cell repair.2) helps the thyroid gland3) -mineral4) for the control of weeds,fungus,molds, and insects.7) helps the blood to carry oxygen9) helps turn food into energy12) female-3-4 male- 3-415) strengthens bones and teeth20) the feeding step or level at whic each organism apperars in the food chain.21) female- 6 Male-722) a chemical that produces and acidic substance, having a ph value less than 725) builds and repairs body tissues26) helps us see dim in the light28) a chemical that produces a basic substance, having a Ph value more than 731) is the process of adding calcium carbonate.33) supplies energy and heat Across: 2) control insects4) paper saturated with a chemical to indicate if a substance is an acid or a base.5) is used to control populations of insects and pests6) rain or snow containing acid compounds from the air.8) a chemical reaction in which oxygen combines with other elements to form new substances.10) -carbohydrates -protien -lipids -vitamins11) helps us use calcium13) citrus fruits and juices14) A chemical solution used in acidified lakes to neutralize the water.16) accumulation of minerals and chemicals from the environment17) a device that encourages complete oxidation during combustion18) a chemical that changes color to indicate a base or acid.19) a substance that speeds up a chemical reaction without being used in a reaction.23) a mixture of plant compounds used as a chemical indicator.24) amount of DDt accumulated as it moved from 1 to 2 to 3 consumers.25) a way to compare the relative acidity and alkalinity of a substance.27) 100 mg/day or more29) supplies energy30) female-2 male-332) contols fungus and mold34) female-7 male-835) control weed36) 100mg/day or less37) a device that uses a sorbent to reduce oxide emmisions.
 

 

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