Can a person's energy be given off by their personal objects?

Can you please check my Biology answers for me?:)?

• Question 1 Typically, the steps of a scientific investigation are completed in which order? observations, questions, hypothesis, predictions, controlled testing, conclusions observations, hypothesis, predictions, controlled testing, questions, conclusions predictions, questions, hypothesis, controlled testing, observations, conclusions predictions, observations, hypothesis, controlled testing, conclusions, questions Question 2 A hypothesis is a testable definite answer to a given question. testable possible explanation of an observation. proven explanation of an observation. testable observation based on a conclusion. Question 3 A unifying explanation for a broad range of observations is called a hypothesis. controlled experiment. prediction. theory. Question 4 The difference between an atom and an element is an element is made of atoms. atoms are made of elements. atoms are held together by covalent bonds. none of the above. Question 5 2 Acidic solutions have a pH that is less than 7. between 7 and 14. a negative number. more than 7. Question 6 Which of the following is NOT an organic compound? ATP molecule saturated fatty acid monosaccharide ammonia Question 7 Carbohydrates and lipids have many carbon-hydrogen bonds; therefore, they both store energy in these bonds. are easily dissolved in water. dissolve only in vinegar. exist only in cells of plants. Question 8 All organic compounds contain the element carbon. nitrogen. calcium. sodium. Question 9 A molecule shaped like a spiral staircase (double helix) is typical of deoxyribonucleic acid. ribonucleic acid. carbohydrates. both a and b. Question 10 ATP is important to living organisms because it stores hereditary information. stores energy from food to be used by cells. has two extra sugar groups. both b and c Question 11 Which of the following is true about the relationship between energy and chemical reactions? Activation energy is required for a chemical reaction to occur. Activitation energy is not necessary in a chemical reaction which releases energy. Chemical bonds are always broken by energy absorption in a chemical reaction. Energy-absorbing reactions don't occur in chemical reactions. Question 12 An enzyme is not used up when catalyzing a reaction. lowers the activation energy of a reaction. bonds with a substrate molecule at the enzyme's active site. all of the above Question 13 High magnification and good resolution are different names for the same thing. are both needed to make small objects easier to see. make the object itself larger. both a and b Question 14 Surface area is an important factor in limiting cell growth because substances can not enter or leave the cell in numbers large enough to meet the cell's needs the materials cannot enter the cell if it is too small. the cell can burst if the membrane becomes too large. waste products cannot leave the cell if it is too small. My ANSWERS:) 1. A 2. B 3. D 4. A 5. A 6. D 7. A 8. A 9. A 10. B 11. C 12. B 13. B 14. A

• Answer:

  1C - http://www.sciencebuddies.org/science-fair-projects/project_scientific_method.shtml 11A -every reaction has an activation energy. sometimes that energy is extremely small and the reaction just requires a 'nudge'., your choice of C is not incorrect but itn's not fully correct either. energy into a reaction can form bonds as seen in endothermic reactions. in general, though, making bonds is usually an exothermic process. for example, 2H2 + O2 --> 2H2O requires energy to break the H-H and O-O bonds yet releases energy with the formation of the 2 OH bonds. 12D - enzymes are not used up during a reaction, lower the activation energy of a reaction AND bonds with the substrate at the active site. the others are ok