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• place the following stages in the life of a low-mass star, like the sun, in order: a) red giant; b) white dwarf; c) main sequence star
  
• three different reptile skulls with a common ancestor show that the skull changed from having no holes behind the eye to having one hole, and then two holes behind the eye. what conclusion did scientists draw about the reptile? the skull evolved as the reptile developed stronger jaws. the reptile evolved from living in water to living on land. the reptiles were different ages when they died. the reptile was never properly preserved during fossil formation.
  
• identify the reaction type shown and describe the clues that were used to identify it. fe2o3 + 2sio2 → fe2si2o7
  
• on another day, martin bought 123 5 pounds of grapes for a picnic. his friend bought 3 8 of that amount. use compatible fractions to estimate how many pounds of grapes martin’s friend bought. 123 5 → 3 8 → martin's friend bought about pounds of grapes.
  
• a scientist is observing surface groundwater features to determine sources of groundwater. which is one surface feature that the scientist can observe and map?
  
• which sentence in the us constitution provides for limiting the power of government? a. “all persons born or naturalized in the united states . . . are citizens of the united states.” b. “the congress shall have power to lay and collect taxes on incomes, from whatever source derived.” c. “the president shall be commander in chief of the army and navy.” d. “congress shall make no law respecting an establishment of religion . . . or abridging the freedom of speech or of the press.” e. “the constitution . . . shall be the supreme law of the land.”
  
• in this lab, you will use a falling cylinder attached to a propeller in a water bath to explore the conversion of energy in a system. you will vary two different variables and determine how each one affects the temperature of the water. in the space below, write a scientific question that you can answer by doing this experiment.
  
• describe the redox reaction. check all that apply. 2na(s) + cl2(g) → 2nacl(s) sodium atoms are oxidized. chlorine atoms lose electrons. chlorine is the reducing agent. sodium transfers electrons to chlorine. sodium chloride is the oxidizing agent.
  
• choose the best answer. who would fill the cavities in your mouth? el dentista el enfermero el abogado el gerente
  
• select all the correct answers. tammy deposits $1,850 in an individual retirement account earning 2.6% interest, compounded annually. she also deposits $2,015 in business interest bearing account earning 1.5% interest, compounded annually. select the equation and the number of years, x, it will take for the amount of money in both accounts to be equal. round to the nearest whole year.