Hi, students! Welcome back to Primary 4 Basic Science and Technology. In our previous lesson, we learned about Changes In Non Living Things. Today, we’re going to learn about weather.
Objectives
By the end of this lesson, you should be able to:
- Explain the meaning of weather.
- State two factors affecting weather.
- List three weather instruments.
Weather
Weather refers to the state of the atmosphere at a particular time and place. It describes what we experience outside, such as sunshine, clouds, rain, wind, and temperature. Weather can change quickly, even within a single day.
Factors Affecting Weather
There are several factors that influence weather, and some of them include:
- Clouds: Clouds are made up of tiny water droplets or ice crystals. They can block sunlight, causing cooler temperatures, and release rain or snow.
- Moisture: Moisture in the air, also known as humidity, plays a crucial role in weather. It influences cloud formation, precipitation, and temperature.
- Temperature: Temperature refers to the degree of hotness or coldness of the air. It affects the rate of evaporation, cloud formation, and precipitation.
- Wind: Wind is the movement of air from areas of high pressure to areas of low pressure. It influences temperature distribution, cloud movement, and precipitation patterns.
Weather Instruments
There are several tools used to measure and monitor weather conditions. Some of these instruments include:
- Thermometer: A thermometer measures temperature, indicating how hot or cold the air is.
- Wind vane: A wind vane shows the direction from which the wind is blowing.
- Barometer: A barometer measures air pressure, which can help predict changes in weather.
- Rain gauge: A rain gauge collects and measures the amount of rainfall.
Evaluation Questions
Now that you’ve learned about weather, let’s see if you can answer these questions:
- What is the meaning of weather?
- Name two factors that can affect the weather.
- List three weather instruments mentioned in the lesson.
- How does temperature affect weather?
- What is the purpose of a wind vane?
Conclusion
Today, we learned about weather, its meaning, factors that influence it, and some important instruments used to measure weather conditions. Remember, weather is a dynamic phenomenon that constantly changes, and understanding it helps us prepare for different conditions. Keep exploring and learning about the fascinating world of weather!
