Daily Bulletin


The Conversation

  • Written by Dylan Korczynskyj, Associate Professor, University of Notre Dame Australia

Curious Kids is a series for children in which we ask experts to answer questions from kids. You might also like the podcast Imagine This, a co-production between ABC KIDS listen and The Conversation, based on Curious Kids.

I am wondering: is dew the same as rain? What is dew? Thank you – Leo, age 3.

Great questions, Leo!

I am a plant ecologist, and rain and dew are things I need to understand. Plant ecology is all about learning how plants are affected by the world around them (their environment) in the same way that you are affected by your environment.

For example, if you go outside you might consider putting a hat on so you don’t get burnt by the hot sun. Or you might put a coat on so you don’t get cold or wet. Plants are greatly affected by water, whether it comes from dew or rain. So are rain and dew the same?

Read more: Curious Kids: How do you know that we aren't in virtual reality right now?

Curious Kids: What is dew? Dew can form on flowers, too. Flickr/Sarah, CC BY

Dew is the water droplets that we find in the morning on leaves and other things outside, and usually in spring or winter when the air is cold. It is similar to rain because it forms from condensing water vapour. I hear you asking, “…but what does condensing water vapour mean?”. I will try to explain.

Water can be a liquid (we drink liquid water), it can also be a solid (think of ice cubes), and it can be a gas, which we call water vapour. When water warms up enough it breaks into small, fast-moving parts, called molecules. It changes from being a liquid to a gas – water vapour – that floats about in the air.

Curious Kids: What is dew? Water can be solid (like ice), liquid (like the water we drink) or vapour (a gas, like steam). Shutterstock

Think about how the steam (which is water vapour) from your hot bath floats about your bathroom.

So, now you understand what water vapour is and how it is made, think about what will happen if the fast moving water vapour cools down: this will help you understand condensation.

As the vapour cools, it slows down. The small parts, the molecules, start to gather together, especially on cold things (like a cool leaf) or in cold areas (like high in the sky). Scientists would say the water condenses.

If enough water molecules gather together (like a little water molecule “meeting”) they form a droplet of liquid water.

This same process (condensation) occurs when the stream from your hot bath condenses on the cold bathroom mirror – have you ever drawn a face on it?

Curious Kids: What is dew? When steam from your bath cools down it can form droplets on your bathroom mirror - you can draw on it! Flickr/suzienewshoes, CC BY

Whether the droplets that form are dew or rain depends on where they formed.

Rain forms from water vapour condensing high in the sky as clouds. If enough water molecules gather together, it will get too heavy to stay in the sky and fall down on your head as rain.

Dew forms from water vapour that condenses on cold surfaces on the ground, like grass or a car on a cool morning (it usually gets a bit cooler early in the morning).

Curious Kids: What is dew? Here is some dew that formed on a car. M Fletcher, CC BY

All plants need water and so do we – it is very precious to all life! Most plants get their water from the soil, but this water originally fell as rain and then soaked into the soil.

Some plants and lichen (lichen are like plants) can absorb water from dew. It’s a little bit like they are “drinking” the dew.

I hope this helps.

Read more: Curious Kids: where do clouds come from and why do they have different shapes?

Hello, curious kids! Have you got a question you’d like an expert to answer? Ask an adult to send your question to curiouskids@theconversation.edu.au

Curious Kids: What is dew? CC BY-ND Please tell us your name, age, and which city you live in. We won’t be able to answer every question but we will do our best.

Authors: Dylan Korczynskyj, Associate Professor, University of Notre Dame Australia

Read more http://theconversation.com/curious-kids-what-is-dew-103341

Writers Wanted

Over 1 million mail-in ballots could be rejected in the US election — and the rules are changing by the day

arrow_forward

Thinking of ditching private health insurance in the pandemic? Here's how to calculate if it's worth it for you

arrow_forward

Why philosophers say solitude can be helpful (even if you didn't choose it)

arrow_forward

The Conversation
INTERWEBS DIGITAL AGENCY

Politics

Prime Minister Interview with Kieran Gilbert, Sky News

KIERAN GILBERT: Kieran Gilbert here with you and the Prime Minister joins me. Prime Minister, thanks so much for your time.  PRIME MINISTER: G'day Kieran.  GILBERT: An assumption a vaccine is ...

Daily Bulletin - avatar Daily Bulletin

Did BLM Really Change the US Police Work?

The Black Lives Matter (BLM) movement has proven that the power of the state rests in the hands of the people it governs. Following the death of 46-year-old black American George Floyd in a case of ...

a Guest Writer - avatar a Guest Writer

Scott Morrison: the right man at the right time

Australia is not at war with another nation or ideology in August 2020 but the nation is in conflict. There are serious threats from China and there are many challenges flowing from the pandemic tha...

Greg Rogers - avatar Greg Rogers

Business News

What Few People Know About Painters

What do you look for when renting a house? Most potential tenants look for the general appearance of a house. If the house is poorly decorated, they are likely to turn you off. A painter Adelaide ...

News Co - avatar News Co

Important Instagram marketing tips

Instagram marketing is one of the most important approaches for digital advertisers. If you want to promote products online, then Instagram along with Facebook is the perfect option. After Faceboo...

News Co - avatar News Co

Top 3 Accident Law Firms of Riverside County, CA

Do you live in Riverside County and faced an accident and now looking for a trusted Law firm to present your case? If yes, then you have come to the right place. The purpose of the article is to...

News Co - avatar News Co



News Co Media Group

Content & Technology Connecting Global Audiences

More Information - Less Opinion