Science for Grade 4
1 Introduction to Science
1-1 Understanding the Nature of Science
1-2 Importance of Observation and Experimentation
1-3 Scientific Tools and Their Uses
2 Matter and Materials
2-1 Properties of Matter
2-1 1 Solids, Liquids, and Gases
2-1 2 Physical and Chemical Changes
2-2 States of Matter
2-2 1 Characteristics of Solids, Liquids, and Gases
2-2 2 Changes of State (Melting, Freezing, Boiling, Condensation)
2-3 Mixtures and Solutions
2-3 1 Types of Mixtures (Homogeneous and Heterogeneous)
2-3 2 Solubility and Factors Affecting Solubility
3 Force and Motion
3-1 Understanding Force
3-1 1 Types of Forces (Push, Pull, Friction, Gravity)
3-1 2 Effects of Force on Objects
3-2 Motion and Speed
3-2 1 Types of Motion (Linear, Circular, Oscillatory)
3-2 2 Measuring Speed and Distance
3-3 Balanced and Unbalanced Forces
3-3 1 Concept of Equilibrium
3-3 2 Newton's First Law of Motion
4 Energy
4-1 Forms of Energy
4-1 1 Mechanical, Thermal, Light, Sound, Electrical, and Chemical Energy
4-1 2 Transformation of Energy
4-2 Sources of Energy
4-2 1 Renewable and Non-Renewable Energy Sources
4-2 2 Conservation of Energy
5 Earth and Space
5-1 Earth's Structure
5-1 1 Layers of the Earth (Crust, Mantle, Core)
5-1 2 Earth's Surface Features (Mountains, Valleys, Plains)
5-2 Weather and Climate
5-2 1 Weather Patterns and Instruments
5-2 2 Factors Affecting Climate
5-3 Solar System
5-3 1 Planets and Their Characteristics
5-3 2 Moon and Its Phases
6 Living Organisms and Ecosystems
6-1 Classification of Living Organisms
6-1 1 Kingdoms of Life (Plantae, Animalia, Fungi, Protista, Monera)
6-1 2 Basic Needs of Living Organisms
6-2 Ecosystems
6-2 1 Components of an Ecosystem (Producers, Consumers, Decomposers)
6-2 2 Food Chains and Food Webs
6-3 Adaptations and Habitats
6-3 1 Adaptations for Survival
6-3 2 Types of Habitats (Forests, Deserts, Oceans, Grasslands)
7 Health and Nutrition
7-1 Human Body Systems
7-1 1 Digestive, Respiratory, Circulatory, and Nervous Systems
7-1 2 Functions of Body Systems
7-2 Nutrition and Diet
7-2 1 Nutrients and Their Functions
7-2 2 Balanced Diet and Healthy Eating Habits
7-3 Personal Hygiene
7-3 1 Importance of Cleanliness
7-3 2 Preventing Diseases
8 Environmental Science
8-1 Importance of Biodiversity
8-1 1 Types of Biodiversity (Genetic, Species, Ecosystem)
8-1 2 Threats to Biodiversity
8-2 Pollution and Its Effects
8-2 1 Types of Pollution (Air, Water, Soil)
8-2 2 Ways to Reduce Pollution
8-3 Conservation of Natural Resources
8-3 1 Sustainable Use of Resources
8-3 2 Role of Individuals in Conservation
Solar System Explained

Solar System Explained

1. The Sun

The Sun is the central star of our Solar System. It is a huge ball of hot gas, mostly made up of hydrogen and helium. The Sun provides light and heat, which are essential for life on Earth.

Example: Think of the Sun as the head of a family. All the planets and other objects in the Solar System orbit around it, just like family members gather around the head of the family.

2. Planets

There are eight planets in our Solar System: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Each planet has its own characteristics, such as size, distance from the Sun, and composition.

Example: Imagine the planets as different rooms in a house. Each room has its own unique features and purpose, just like each planet has its own unique characteristics.

3. Moons

Moons are natural satellites that orbit planets. Earth has one moon, while other planets have multiple moons. Moons can influence tides and other natural phenomena on their host planets.

Example: Think of moons as pets that follow their owners around. Just like pets, moons orbit around their planets, providing companionship and sometimes influencing their environment.

4. Asteroids

Asteroids are small rocky bodies that orbit the Sun. They are remnants from the formation of the Solar System. Most asteroids are found in the asteroid belt between Mars and Jupiter.

Example: Imagine asteroids as leftover pieces of a puzzle. They are parts of the Solar System that didn't quite fit into the main picture, but they still play a role in the overall structure.

5. Comets

Comets are icy bodies that orbit the Sun. When they come close to the Sun, they heat up and form a bright head and a long tail. Comets are often referred to as "dirty snowballs" because of their composition.

Example: Think of comets as ice cream cones that melt when they get too close to the Sun. The melted ice cream forms a trail behind the cone, just like the tail of a comet.

Understanding the Solar System helps us appreciate the vastness and complexity of the universe. Whether it's the central star, the planets, moons, asteroids, or comets, each component plays a crucial role in the grand design of our Solar System.