Study sheet: Foundations of Life and Matter

📋 Course Outline

1. Cells and Their Organelles
2. Plant and Animal Tissues
3. Motion and Its Measurement
4. Mixtures and Separation Methods
5. Forces and Newton’s Laws
6. Work Energy and Machines
7. Atomic Structure and Numbers
8. Elements Compounds and Molecules
9. Biodiversity and Classification

📖 1. Cells and Their Organelles

🔑 Key Concepts & Definitions

• Cell : the basic structural and functional unit of every living organism
• Cell membrane : a thin boundary that controls the movement of substances into and out of the cell
• Nucleus : contains genetic material and controls the activities of the cell

★ Must-know

📌 Unicellular organisms consist of a single cell, whereas multicellular organisms are made up of many cells.

📌 Plant cells generally have a cell wall, chloroplasts and larger vacuoles, whereas animal cells do not have a cell wall or chloroplasts and generally have smaller vacuoles.

Further detail

• Mitochondria release energy through cellular respiration, ribosomes help make proteins, and the endoplasmic reticulum and Golgi apparatus are involved in forming, processing and transporting substances.

💡 Memory Hook

Plant cells have walls and chloroplasts; animal cells generally do not.

📖 2. Plant and Animal Tissues

🔑 Key Concepts & Definitions

• Tissue : a group of similar cells that work together to perform a particular function

★ Must-know

📌 Plant tissues are broadly divided into meristematic tissues, whose cells actively divide for growth, and permanent tissues, whose cells have stopped dividing.

📌 Xylem mainly transports water and minerals, whereas phloem transports prepared food through plants.

• Animal tissues include:
  • epithelial tissue
  • connective tissue
  • muscular tissue
  • nervous tissue

Further detail

• Meristematic tissues occur in regions such as the tips of roots and shoots.

• Simple permanent tissues include:

  • parenchyma
  • collenchyma
  • sclerenchyma

💡 Memory Hook

Meristematic tissues divide; permanent tissues have stopped dividing.

📖 3. Motion and Its Measurement

🔑 Key Concepts & Definitions

• Motion : occurs when an object changes its position with respect to a reference point with time

★ Must-know

📌 Distance is the total path length and a scalar quantity, whereas displacement is the shortest distance between initial and final positions together with direction and is a vector quantity.

📐 Formula — Speed equals distance divided by time: $\text{Speed}=\frac{\text{Distance}}{\text{Time}}$.

📐 Formula — Velocity equals displacement divided by time: $\text{Velocity}=\frac{\text{Displacement}}{\text{Time}}$.

📐 Formula — Acceleration equals change in velocity divided by time: $\text{Acceleration}=\frac{\Delta\text{velocity}}{\text{Time}}$.

Further detail

📌 Uniform motion covers equal distances in equal time intervals, whereas non-uniform motion covers changing distances in equal time intervals.

• The slope of a distance-time graph represents speed, while the slope of a velocity-time graph represents acceleration.

💡 Memory Hook

Distance → displacement → speed → velocity → acceleration

📖 4. Mixtures and Separation Methods

🔑 Key Concepts & Definitions

• Mixture : formed when two or more substances are physically combined without undergoing a chemical change, so the substances retain their individual properties
• Solution : consists of a solute dissolved in a solvent, and its concentration depends on the amount of solute in a given amount of solution

📝 Essential Points

📌 A homogeneous mixture has a uniform composition throughout, whereas a heterogeneous mixture does not have a uniform composition.

• Filtration separates an insoluble solid from a liquid, and evaporation obtains a dissolved solid from a solution.

• Distillation separates substances according to differences in boiling points, centrifugation separates components according to differences in density, and chromatography separates components according to different rates of movement through a medium.

💡 Memory Hook

Homogeneous mixtures are uniform; heterogeneous mixtures are not.

📖 5. Forces and Newton’s Laws

🔑 Key Concepts & Definitions

• Force : a push or pull that can change the state of rest or motion, speed, direction or shape of an object
• Friction : a force that opposes relative motion between surfaces in contact and can cause wear and energy loss, although it is useful in walking and writing

📝 Essential Points

📌 Balanced forces are equal and opposite and do not change an object's motion, whereas unbalanced forces can change its motion.

📌 Newton’s First Law states that an object remains at rest or continues with uniform velocity unless an external unbalanced force acts on it; this property is called inertia.

📐 Formula — Newton’s Second Law relates force, mass and acceleration as $F=ma$.

📌 Newton’s Third Law states that every action has an equal and opposite reaction.

💡 Memory Hook

Balanced forces preserve motion; unbalanced forces change it.

📖 6. Work Energy and Machines

🔑 Key Concepts & Definitions

• Work : done when a force acts on an object and produces displacement in the direction of the force
• Energy : the capacity of an object to do work

★ Must-know

📐 Formula — Work equals force multiplied by displacement: $W=F\times d$, and its SI unit is the joule (J).

📐 Formula — Kinetic energy is energy due to motion and equals $KE=\frac{1}{2}mv^2$.

Further detail

• Potential energy is stored energy possessed because of an object's position or condition, and gravitational potential energy depends on mass, gravitational acceleration and height.

• Examples of simple machines include:

  • levers
  • pulleys
  • inclined planes
  • wheels and axles
  • screws

💡 Memory Hook

Force causing displacement → work; motion or position → energy.

📖 7. Atomic Structure and Numbers

🔑 Key Concepts & Definitions

• Atom : the smallest unit of an element that retains the chemical properties of that element
• Atomic number : the number of protons in its atom

★ Must-know

• Protons have positive charge, electrons have negative charge, and neutrons have no charge; protons and neutrons are in the nucleus, while electrons are arranged around it.

📌 In a neutral atom, the number of protons equals the number of electrons.

📐 Formula — Mass number equals the number of protons plus the number of neutrons: $A=Z+N$.

Further detail

• Electrons occupy different shells or energy levels around the nucleus, and their arrangement influences an element’s chemical behaviour.

💡 Memory Hook

A nucleus containing protons and neutrons surrounded by electron shells.

📖 8. Elements Compounds and Molecules

🔑 Key Concepts & Definitions

• Element : a pure substance made up of only one type of atom and identified by a unique atomic number and chemical symbol
• Compound : formed when atoms of different elements combine chemically in fixed proportions
• Molecule : a group of two or more atoms chemically bonded together, consisting of atoms of the same element or different elements

★ Must-know

• The formula H₂O represents water and shows that two hydrogen atoms are combined with one oxygen atom.

Further detail

• Relative atomic mass compares the mass of an atom with a standard reference.

• The molecular mass of a substance is calculated by adding the atomic masses of all atoms present in one molecule.

💡 Memory Hook

Atoms → molecules → compounds → chemical formulae

📖 9. Biodiversity and Classification

🔑 Key Concepts & Definitions

• Biodiversity : the variety of organisms in the living world
• Classification : the systematic arrangement of organisms into groups based on their similarities and differences

★ Must-know

• Classification can use:

  • cell structure
  • number of cells
  • body organisation
  • mode of nutrition
  • method of reproduction

• Important broad groups include:

  • plants
  • animals
  • fungi
  • protists
  • microorganisms

📌 Plants are generally multicellular and make their own food through photosynthesis, animals generally obtain food from other organisms, fungi obtain nutrients from organic matter, and microorganisms may be useful or harmful.

Further detail

• Classification makes organisms easier to study and helps reveal relationships between different groups.

💡 Memory Hook

Plants generally make food; animals generally obtain food from other organisms.

📊 Synthesis Tables

Plant and Animal Tissues

Tissue	Main role
Epithelial	Covers and protects surfaces
Connective	Supports and connects parts
Muscular	Produces movement
Nervous	Receives and transmits messages

Separation Methods

Method	Basis or result
Filtration	Insoluble solid from liquid
Evaporation	Dissolved solid from solution
Distillation	Different boiling points
Centrifugation	Different densities
Chromatography	Different movement rates through a medium