#1 Figure 8.1 Atoms 2 examples of elements: H and C

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Presentation transcript:

#1 Figure 8.1 Atoms 2 examples of elements: H and C Same number of electrons and protons neutral atoms (no charge)

#2 Figure 8.7 - Covalent Bonds in Molecules Covalent bonds share electrons

#3 Figure 8.2 - Molecules Number of electrons determines the number of bonds Molecules are formed when atoms bond together

#4 Figure 8.3 - Endothermic Reactions Endothermic reactions take in heat ice melting: needs energy put in; no change in molecules, only in organization so it is an endothermic process endothermic reaction: chemical bonds break and reform - add energy to water to form O2 and H2 gases

#5 Figure 8.8 - Enzymes Top: synthesis = forming one new product from two (or more) substrates Bottom: decomposition = breaking down molecules into smaller parts Enzyme doesn’t change in reaction; only the substrate and the products

#6 Figure 8.5 - Potential and Kinetic Energy Potential energy - stored energy; has the ability to do work but is not yet doing it Kinetic energy - energy of movement

#7 Figure 8.6 - Regulating Energy Storage Glycogen = stored glucose Using a lot of energy-body converts stored glycogen to glucose for energy Using less energy-body converts food to storage molecules (like glycogen)

#8 Figure 8.9 - Structure of ATP Body stores energy by forming ATP Release energy by removing P from ATP ATP → ADP energy is released when this happens