Why doesn't it snow in the summer?
that the temperature affects the state of matter;
that there is no snow or frost on hot days.
distinguish between precipitation and other types of atmospheric deposits;
indicate the relationship between temperature and the type of precipitation and atmospheric deposits;
explain why some types of precipitation occur only at certain times of the year.
Precipitation
Water droplets and ice crystals in the clouds become too big and too heavy to stay in the air, so they fall to the ground. This is called precipitationprecipitation. However, the type of precipitation doesn't only depend on whether there are water droplets or ice crystals in the cloud. it is also determined by the air temperature in the lower atmosphere layer. When it is positive – it rains, but when the temperature drops below zero, then we observe snow. Sometimes the water drops are so small that the wind easily lifts them. Then we deal with drizzle.
Another type of precipitation is hail. It consists of ice blocks, called hailstones, whose diameter is usually between 5 mm and 30 mm. They are created in storm clouds due to strong air currents inside the cloud and the collision of ice crystals with droplets of water. Hail stones are most common in spring and summer.
Before you watch the movie „We're making a rain gauge”, write down the research question and the hypothesis. Make notes while watching the movie, and finally make conclusions.
Film dostępny na portalu epodreczniki.pl
Nagranie filmowe przedstawiające sposoby zbudowania deszczomierza. Z dużej plastikowej butelki odcinamy wąską część z nakrętką - pozostaje trzy czwarte butelki. Na dno wsypujemy kamienie i robimy podziałkę od przyłożonej linijki co dwa centymetry. Zaznaczamy ją markerem. Odciętą część nakładamy odwróconą na butelkę bez nakrętki. Mocujemy ją taśmą klejącą.
Atmospheric deposits
It happens when the water vapor in the air comes into contact with the cold ground, condenses and settles in the form of dew. We observe this on windless and cloudless evenings and mornings. In winter, when the ground temperature is below zero, we have hoarfrost. Due to the low temperature, ice crystals are formed instead of water droplets.
Similar to the frost, another atmospheric depositatmospheric deposit is rime. It forms during cold weather, when hot and humid air flows over very cold ground. On the branches of trees, telephone lines or fences we can observe big ice crystals forming an increasingly thick layer. Another, dangerous atmospheric deposit, is called glaze. When the ground temperature is negative, raindrops freeze on the ground and form a thin layer of thin ice.
What is the summer precipitation in Poland?
- big drops
- slow but prolonged precipitation
- intensive but short-term precipitation
- small drops
Assign the atmospheric event to precipitation or deposit.
hoarfrost, rainbow, rime, rain, snow, hail, fog, dew, glaze
| precipitation | |
|---|---|
| atmospheric deposits | |
| elements that do not fit into any category |
Summary
Rainfall, snow and hail are precipitation.
Atmospheric deposits include: dew, hoarfrost, rime and glaze.
Keywords
precipitation, atmospheric deposits, rain
Glossary
opady atmosferyczne – ciekłe i stałe produkty kondensacji pary wodnej opadające na powierzchnię ziemi, np. deszcz, śnieg, grad
osady atmosferyczne – ciekłe i stałe produkty kondensacji pary wodnej powstające na skutek kontaktu podłoża z cieplejszym powietrzem, np. szron, gołoledź, szadź