Thunder is the sound produced by lightning. When lightning occurs, it heats the air around it quickly which causes the air to expand rapidly. This rapid expansion of air creates a shock wave which produces the sound of thunder. The distance of the lightning can be estimated based on the time between seeing the lightning and hearing the thunder. Hot weather occurs between spring and autumn around the summer solstice when days are longest and nights are shortest. The beginning of summer varies by location but summer occurs in the northern hemisphere when it is winter in the southern hemisphere and vice versa. Rainy season is the time of year when most of the annual rainfall occurs, dispersed across tropical and subtropical areas, with rainfall above 60mm per month on

1. Unit : weather
Prathomsuksa 3

4. weather

5. thunder

7. How to use “like and don’t like”
I like…(N) I don’t like…(N)
Example Example
I like warm weather. I don’t like cold weather.

9. Thunder is the sound made by lightning. Depending on the
nature of the lightning and distance of the listener, thunder can range
from a sharp, loud crack to a long, low rumble (brontide). The sudden
increase in pressure and temperature from lightning produces rapid
expansion of the air surrounding and within a bolt of lightning. In turn,
this expansion of air creates a sonic shock wave which produces the
sound of thunder, often referred to as a clap, crack, or peal of thunder.
The distance of the lightning can be calculated by the listener based on
the time interval from when the lightning is seen to when the sound is
heard.

10. Hot weather is the warmest of the four temperate
seasons, between spring and autumn. At the summer solstice, the days
are longest and the nights are shortest, with day-length decreasing as
the season progresses after the solstice. The date of the beginning of
summer varies according to climate, culture, and tradition, but when it
is summer in the Northern Hemisphere it is winter in the Southern
Hemisphere, and vice versa.

11. Rainy is the time of year, covering one or more
months, when most of the average annual rainfall in a region occurs.
The term green season is also sometimes used as a euphemism by
tourist authorities. Areas with wet seasons are dispersed across
portions of the tropics and subtropics. Under the Koppen climate
classification, for tropical climates, a wet season month is defined as a
month where average precipitation is 60 millimetres (2.4 in) or more.
In contrast to areas with savanna climates and monsoon regimes,
mediterranean climates have wet winters and dry summers.
Tropical rainforests technically do not have dry or wet seasons, since
their rainfall is equally distributed throughout the year. Some areas
with pronounced rainy seasons will see a break in rainfall mid-
season, when the intertropical convergence zone or monsoon
trough moves poleward of their location during the middle of the warm
season.

13. Musical weather
Listen to the music sound. You can hear classical songs
about the weather. After you have heard the music ,
you choose the suitable picture that appropriate with
the music , then answer the question
“Do you like this weather, why or why not?”

22. thunder and lightening snow cold weather
warm weather rain strong winds