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
Weather and Climate Explained

Weather and Climate Explained

Key Concepts

Weather and Climate are two important concepts in meteorology. Weather refers to the short-term atmospheric conditions, while Climate refers to the long-term average of weather patterns in a particular region.

1. Weather

Weather is the day-to-day condition of the atmosphere at a specific place and time. It includes elements like temperature, humidity, precipitation, wind speed, and cloud cover.

Example: Today, the weather in New York is sunny with a temperature of 25°C, low humidity, and a gentle breeze.

Analogy: Think of weather like your mood on a particular day. It can change frequently based on various factors, such as how you feel or what activities you are doing.

2. Climate

Climate is the long-term pattern of weather in a particular area. It is determined by factors such as temperature, precipitation, humidity, and wind patterns over a period of at least 30 years.

Example: The climate of Miami is tropical, with hot and humid summers and warm winters.

Analogy: Think of climate like your overall personality. It represents your typical behavior and characteristics over a long period, unlike your mood, which can change daily.

3. Temperature

Temperature is a measure of how hot or cold something is. It is one of the most important elements of weather and climate. Temperature can be measured in degrees Celsius (°C) or Fahrenheit (°F).

Example: The temperature today is 20°C, which is comfortable for outdoor activities.

Analogy: Think of temperature like the warmth of a hug. A warm hug feels cozy, just like a high temperature feels hot, while a cold hug feels chilly, similar to a low temperature.

4. Precipitation

Precipitation refers to any form of water that falls from the sky to the Earth's surface. It includes rain, snow, sleet, and hail.

Example: Today, there is a 70% chance of rain, which means we can expect precipitation in the form of rain.

Analogy: Think of precipitation like a shower. Just as water falls from a showerhead, precipitation falls from the clouds to the ground.

5. Humidity

Humidity is the amount of water vapor in the air. High humidity makes the air feel damp and sticky, while low humidity makes the air feel dry.

Example: Today, the humidity is 80%, which makes it feel warmer than the actual temperature.

Analogy: Think of humidity like a sponge. A wet sponge holds a lot of water, just like high humidity holds a lot of water vapor in the air, while a dry sponge holds little water, similar to low humidity.

Understanding these key concepts helps us appreciate the conditions around us and make informed decisions based on weather and climate. Whether it's planning outdoor activities, dressing appropriately, or understanding long-term environmental patterns, knowledge of weather and climate is essential.