1. Chemistry: Chemical Reactions and Equations
This chapter teaches you how to describe chemical changes using symbols and how to balance them
to satisfy the Law of Conservation of Mass.
Summary
Chemical Equations: Representing reactions using formulas. Balancing is essential so that
atoms on the reactant side equal atoms on the product side.
Types of Reactions:
o Combination: Two reactants form one product ($A + B \rightarrow AB$).
o Decomposition: One reactant breaks into multiple products. This requires energy
(Thermal, Electrolytic, or Photolytic).
o Displacement: A more reactive element pushes out a less reactive one.
o Double Displacement: Exchange of ions between two compounds.
o Redox (Oxidation-Reduction): One substance gains oxygen/loses electrons
(Oxidation) while the other loses oxygen/gains electrons (Reduction).
Corrosion & Rancidity: Effects of oxidation in daily life.
Important Questions
1. Why should a magnesium ribbon be cleaned before burning in air?
2. Balance the following: $Fe + H_2O \rightarrow Fe_3O_4 + H_2$.
3. Explain the difference between Exothermic and Endothermic reactions with examples.
4. Why is the decomposition of silver chloride in sunlight considered a Photolytic reaction?
Write the equation.
Biology: Life Processes
The biggest chapter in the book, covering the four basic functions that keep a living being alive.
Summary
Nutrition: Autotrophic (Photosynthesis in plants) and Heterotrophic (Amoeba and Human
Digestive System).
Respiration: Breaking down glucose to release energy. Breakdown can be Aerobic (with
$O_2$) or Anaerobic (without $O_2$, producing Lactic acid or Ethanol).
Transportation: * Humans: The Heart (double circulation) and Blood.
o Plants: Xylem (water/minerals) and Phloem (food/translocation).
Excretion: Removing nitrogenous waste. The Nephron is the functional unit of the kidney.
This chapter teaches you how to describe chemical changes using symbols and how to balance them
to satisfy the Law of Conservation of Mass.
Summary
Chemical Equations: Representing reactions using formulas. Balancing is essential so that
atoms on the reactant side equal atoms on the product side.
Types of Reactions:
o Combination: Two reactants form one product ($A + B \rightarrow AB$).
o Decomposition: One reactant breaks into multiple products. This requires energy
(Thermal, Electrolytic, or Photolytic).
o Displacement: A more reactive element pushes out a less reactive one.
o Double Displacement: Exchange of ions between two compounds.
o Redox (Oxidation-Reduction): One substance gains oxygen/loses electrons
(Oxidation) while the other loses oxygen/gains electrons (Reduction).
Corrosion & Rancidity: Effects of oxidation in daily life.
Important Questions
1. Why should a magnesium ribbon be cleaned before burning in air?
2. Balance the following: $Fe + H_2O \rightarrow Fe_3O_4 + H_2$.
3. Explain the difference between Exothermic and Endothermic reactions with examples.
4. Why is the decomposition of silver chloride in sunlight considered a Photolytic reaction?
Write the equation.
Biology: Life Processes
The biggest chapter in the book, covering the four basic functions that keep a living being alive.
Summary
Nutrition: Autotrophic (Photosynthesis in plants) and Heterotrophic (Amoeba and Human
Digestive System).
Respiration: Breaking down glucose to release energy. Breakdown can be Aerobic (with
$O_2$) or Anaerobic (without $O_2$, producing Lactic acid or Ethanol).
Transportation: * Humans: The Heart (double circulation) and Blood.
o Plants: Xylem (water/minerals) and Phloem (food/translocation).
Excretion: Removing nitrogenous waste. The Nephron is the functional unit of the kidney.
