URGENT! PLEASE HELP!

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Today, Marjorie’s lab work involves working with bases. Which types of safety equipment is Marjorie most likely to need? A. gloves and safety glasses B. safety glasses and litmus paper C. a fire extinguisher and a blanket D. litmus paper and an apron _________________________________________________________ Which of the following compounds in the liquid phase can be considered an electrolyte? A. CO2 (carbon dioxide) B. CuO (oxidized copper) C. H2O (distilled water) D. H2O2 (hydrogen peroxide) E. NaCl (sodium chloride) __________________________________________________________ A ball is traveling at a constant velocity of 50 m/s and has been traveling for over 2 minutes. What is the ball’s acceleration? A. 0 B. 25 m/s C. 25 m/s2 D. 50 m/s2 _______________________________________________________ Juanita would like to know whether a sample of a solid will float in water. In which type of table could she find this information? A. densities B. chemical properties C. periodic table D. solubilities _________________________________________________________ A scientist is trying to discover a new treatment to stop cancer cells from dividing. In the cancer cells, which of these processes will stop if the treatment is successful? A. mitosis B. chemosynthesis C. binary fission D. genetic recombination ________________________________________________________ Which of the following is another word for the kneecap in the human body? A. Pisiform B. Meniscus C. Popliteal bursa D. Patella ________________________________________________________ Which of the following statements best explains why all animals need food in order to live? A. Body mass must be maintained, and food supplies the needed body mass. B. Cells, tissues, and organs require energy to carry out their tasks, and food provides the needed energy. C. A balanced diet is necessary to maintain strong bones and healthy teeth. D. Food contains essential vitamins and minerals bodies need in order to synthesize other nutrients. ________________________________________________________ Blood enters the lungs from which chamber of the heart? A. Right atrium B. Left atrium C. Right ventricle D. Left ventricle ____________________________________________________ Which of the following is not considered a type of radiation ray? A. Gamma B. Beta C. Alpha D. Infrared ______________________________________________________ The enzyme maltase does the following: A. Breaks down lactose to glucose B. Turns glucose into maltose C. Breaks down maltose to glucose D. Turns glucose into lactose ______________________________________________________ The condition of rickets is associated with a deficiency in which vitamin? A. A B. C C. D D. Z __________________________________________________ Outer shell electrons are known as ______ electrons. A. Hybrid B. Valence C. Vector D. Transitional _____________________________________________________ It is not easy to observe individual chromosomes during the interphase because: A. the DNA has not been duplicated yet. B. they have uncoiled to form long, thin strands. C. they leave the nucleus and are scattered throughout the cell. D. homologous chromosomes do not pair up until division starts. __________________________________________________________ Which of the following pH ranges is a strong base? A. 1.3-2.0 B. 4.5-5.2 C. 7.1-9.0 D. 11.2-12.0