☰ Contents · Natural science

Weather and the water cycle

Lessons 22–23 · 2 lessons · Y.V. Malikova. Natural Science Grade 3, Part 1. Novda Edutainment, Tashkent, 2023; Y.V. Malikova. Natural Science Grade 3, Part 2. Novda Edutainment, Tashkent, 2023
22

Weather and kinds of precipitation

Textbook: Part 1, pp. 96–99
GoalKnow what weather is, the kinds of precipitation (rain, snow, hail, dew, frost), wind and cloudiness, and weather symbols.
New words
weather · ob-havoprecipitation · yog‘ingarchilikmeteorologist · meteorolog
Explanation

Weather is what the air is like in one place at one time: hot or cold, windy or calm, rainy or dry. It depends on air temperature, wind, humidity, clouds and precipitation. Precipitation is water from the air that falls to the ground or forms on things at the surface: rain, snow and hail, and also dew and frost. In warm weather clouds give rain; in winter, in very cold clouds, water vapour turns into tiny ice crystals, which are snowflakes. Hail consists of small balls of ice and can damage trees and crops. Dew is drops of water that form from the vapour in the air on grass and leaves cooled during the night; if the temperature is below zero, white ice needles called frost form instead. Wind is moving air; a very strong wind is a storm. The sky may be clear, partly cloudy or overcast. Scientists who observe the weather are meteorologists; they use special symbols for sun, cloud, rain and wind.

Worked examples
The glittering drops on grass in the morning are dew.
On a rainy day we wear boots and take an umbrella; on a snowy day we dress warmly.
Class activity

Weather diary: for 5 days in a row record or draw the weather (sun, cloud, rain, wind, temperature). At the end find the warmest and the coldest day. Safety: do not stay outside during a thunderstorm.

Practice
1
What is weather?
2
List the kinds of precipitation.
3
When does frost form instead of dew?
4
What are scientists who observe the weather called?