SCI10 Water Cycle

The name of the process where water turns from a liquid to a gas is _____.

Answer explanation

The process where water turns from a liquid to a gas is called Evaporation. This is a type of phase transition in which the water molecules gain enough energy to change from a liquid state to a gaseous state. The other options, Precipitation, Condensation, and Sublimation, refer to different types of phase transitions.

When water droplets in the clouds come together and form rain, what is it called?

• Transpiration

• Condensation

• Infiltration

• Precipitation

Answer explanation

The process of water droplets in the clouds coming together to form rain is called 'Precipitation'. This is the correct choice among the given options. 'Transpiration' is the process of water movement through a plant and its evaporation from aerial parts. 'Condensation' is the change of the physical state of matter from gas phase into liquid phase. 'Infiltration' is the process by which water on the ground surface enters the soil.

_____ is the process where plants release water vapor through their leaves.

Answer explanation

The process where plants release water vapor through their leaves is called Transpiration. This is not Respiration, which is the process of converting nutrients into energy, nor Perspiration, a process humans and animals use to cool down. It's also not Precipitation, which refers to the falling of water from the sky in forms like rain or snow.

_____ describes water stored underground in layers of rock and soil.

Answer explanation

Groundwater is the correct answer because it refers to water stored underground in layers of rock and soil. This water accumulates in the spaces between soil particles and in the fractures of rock formations. Oceans, ice, and rivers are all above-ground water sources and do not fit the description of water stored underground.

After evaporation, water vapor rises into the sky and forms _____.

Answer explanation

After evaporation, water vapor rises into the sky due to its lighter nature. As it rises, it cools down and condenses into tiny water droplets or ice crystals, forming clouds. This process is a part of the water cycle, where water evaporates, forms clouds, and eventually falls back to the Earth as precipitation.

When rainwater flows into rivers and streams, it's called what runoff?

• Surface runoff

• Underground runoff

• Sky runoff

• Solid runoff

Answer explanation

Surface runoff is the correct answer because it refers to the process where rainwater flows over the ground and into rivers and streams. This occurs when the soil is unable to absorb the water, either due to saturation or impermeability. The other options, such as underground runoff, sky runoff, and solid runoff, do not accurately describe this phenomenon.

Which of the following are processes in the water cycle?

• Evaporation

• Snowfall

• Transpiration

• Condensation

Answer explanation

The water cycle consists of several processes, including evaporation, transpiration, condensation, and precipitation. Evaporation is the correct choice as it is the process where water changes from a liquid to a gas, rising into the atmosphere. Snowfall is a form of precipitation, while transpiration occurs in plants and condensation is the process of water vapor turning back into a liquid.

Where does the water in a puddle go when it disappears due to the sun's heat?

• Sublimation

• Condensation

• Infiltration

• Precipitation

Answer explanation

When a puddle disappears due to the sun's heat, the water undergoes sublimation. This process involves the direct transition of water from its solid or liquid state to the gaseous state, bypassing the intermediate liquid phase. The sun's heat provides the energy needed for sublimation, causing the water molecules to evaporate and eventually disappear.

What do we call water stored in frozen form in the mountains or polar regions?

• Groundwater

• Snowmelt

• Lakes

• Rivers

Answer explanation

Water stored in frozen form in the mountains or polar regions is called snowmelt. It is the result of snow and ice melting and turning into water. Groundwater, lakes, and rivers are other forms of water storage, but they do not specifically refer to frozen water in these regions.

When water falls from the sky as snow, sleet, or hail, we call it what?

• Precipitation

• Evaporation

• Transpiration

• Condensation

Answer explanation

When water falls from the sky in the form of snow, sleet, or hail, it is called precipitation. Precipitation is the correct answer because it refers to the process by which water is released from clouds and falls to the ground. Evaporation, transpiration, and condensation are other parts of the water cycle, but they do not describe the specific phenomenon of water falling from the sky.