Clouds and precipitation

Hail falls as hard rounded ice particles. Exam tip: remember hail as solid precipitation.

Drizzle has very small water drops falling slowly. Exam tip: connect drizzle with small drops.

Cooling brings air near saturation and cloud droplets can form. Exam tip: remember cooling and condensation together.

Rising air cools and water vapour may condense. Exam tip: connect rising air with cloud formation.

In rain water drops fall from clouds to the ground. Exam tip: connect rain with cloud drops.

Dark dense clouds are often related to rainfall. Exam tip: connect dark dense clouds with rain chance.

Nimbus is associated with rain-bearing clouds. Exam tip: remember nimbus as rain-bearing.

Precipitation can occur in both liquid and solid forms. Exam tip: remember the forms of precipitation.

The change of water vapour into tiny droplets is called condensation. Exam tip: connect cloud droplets with condensation.

Hail consists of hard, often rounded or irregular pieces of ice that fall from clouds. Therefore, hail is the correct answer. Snowfall occurs as soft snowflakes, whereas dew forms by condensation on surfaces and does not fall as precipitation. Exam tip: identify hard ice particles falling from clouds as hail.

Cirrus are thin, wispy high-level clouds that generally occur at about 6 to 13 km altitude. They are mainly composed of ice crystals. The 2 to 6 km range is more typical of middle-level clouds, while 0 to 2 km is associated with low-level clouds. Exam tip: remember cirrus as high, thin, icy clouds.

Stratus clouds are generally low-level grey or white clouds that spread across the sky in a uniform layer or sheet. Feather-like streaks are typical of cirrus clouds, while cotton-like heaps are cumulus clouds. Exam tip: link “stratus” with “strata”, meaning layers.

Cumulus clouds are usually recognized by their rounded, white, and puffy appearance. They often look like heaps of cotton or piles rising upward, with fairly clear edges when the weather is stable. Their shape develops because warm air rises in vertical currents and cools, allowing water vapour to condense. The exact appearance can change with moisture, sunlight, and atmospheric conditions, but the heap-like form is the common identifying feature.

Option A is correct because “puffy and heap-like” describes the usual appearance of cumulus clouds. They are not invisible, because they can be clearly seen in the sky. They are made of water droplets or ice crystals, so they are not hard like stone. They also do not normally have the long, continuous appearance suggested by a sea wave. In a basic geography question, the useful association is simple: cumulus means rounded, piled-up, cotton-like clouds.

Precipitation means atmospheric water falls to the ground in some form. Exam tip: understand precipitation as falling water.

For rainfall droplets must grow in size and weight. Exam tip: distinguish cloud droplets and raindrops.

Snowfall falls as ice so it is solid precipitation. Exam tip: remember snowfall as solid form.

Clouds become visible when vapour condenses into droplets or ice crystals. Exam tip: connect visible cloud with condensed particles.

Earthquake is an internal earth event while rain snow and hail are precipitation. Exam tip: separate atmospheric process and earth movement.

Clouds are groups of condensed water that can become a source of precipitation. Exam tip: treat clouds as a water-cycle link.

Cirrus clouds form at very high altitudes and appear thin, wispy, and fibrous; they are usually made of ice crystals. Therefore, Cirrus is correct. Nimbus refers mainly to rain-bearing clouds, while cumulus clouds are puffy and stratus clouds occur in layers. Exam tip: associate high, thin, feather-like clouds with cirrus.