Chemical Reactions
100: What are reactants in a chemical reaction?
100: Reactants are the starting substances that undergo change in a chemical reaction.
100: What is a chemical equation?
100: A chemical equation uses symbols and formulas to represent a chemical reaction.
100: Name the three main types of carbon-based molecules in food.
100: Carbohydrates, proteins, and lipids are the three main types of carbon-based molecules in food.
100: What is photosynthesis?
100: Photosynthesis is the process where plants use sunlight, water, and carbon dioxide to make glucose and oxygen.
100: What is cellular respiration?
100: Cellular respiration breaks down glucose to release energy in the form of ATP.
200: What are the products of a reaction ( CH4 + 2O2 > CO2 + 2H2O)?
carbon dioxide and water. (CO2 + 2H2O)
200: How do you identify elements in a chemical equation?
200: Elements in a chemical equation are identified by their symbols, like
𝐻
H for hydrogen.
200: How do plants store carbohydrates?
200: Plants store carbohydrates as starch for energy use later.
200: What are the inputs and outputs of photosynthesis?
200: Photosynthesis requires water, carbon dioxide, and sunlight as inputs and produces glucose and oxygen.
200: Where does cellular respiration occur in cells?
200: Cellular respiration takes place in the mitochondria of cells.
300: Explain the role of energy in chemical reactions.
300: Energy is absorbed to break bonds in reactants and released when new bonds form in products.
300: Give an example of a chemical equation and explain its parts.
300: 2H2+O2→2H2O, 2H2 and O2 are reactants, and 2H2O is the product, showing the ratio of molecules.
300: What are proteins responsible for in cells?
300: Proteins help build and repair cells, speed up reactions, and support cellular functions.
300: How do chloroplasts function in photosynthesis?
300: Chloroplasts absorb sunlight and use it to power the reactions that create glucose and oxygen.
300: What are the products of cellular respiration?
300: Cellular respiration produces carbon dioxide, water, and energy in the form of ATP.
400: What happens to bonds during a chemical reaction?
400: Bonds in reactants break and new bonds form in products during a chemical reaction.
400: What is the significance of balancing a chemical equation?
400: Balancing ensures the same number of each atom on both sides of the equation, preserving matter.
400: Why are lipids important for energy storage?
400: Lipids store energy efficiently because they contain a high amount of energy per gram.
400: What is primary productivity and why is it important?
400: Primary productivity measures how fast photosynthetic organisms produce food, forming the base of the food chain.
400: How are photosynthesis and cellular respiration related?
400: Photosynthesis and cellular respiration are connected as one produces what the other uses, forming a cycle.
500: Describe how matter and energy are conserved in a reaction.
500: Matter and energy are conserved because atoms rearrange without being created or destroyed, and energy changes form but remains constant.
500: Compare and contrast a molecular model and a chemical equation
500: A molecular model shows molecular structures, while a chemical equation represents the reaction symbolically.
500: Explain how consumers obtain energy from carbon-based molecules.
500: Consumers break down carbon-based molecules during cellular respiration to release stored energy.
500: Describe the role of sunlight in photosynthesis.
500: Sunlight provides the energy needed to convert carbon dioxide and water into glucose in photosynthesis.
500: Explain the process of energy release during cellular respiration.
500: Energy is released during cellular respiration when glucose is broken down to produce ATP for cellular activities.