How Does Frost Form: DIY Science Project Ideas for Kids

Have you ever wondered how frost forms on a solid surface? You might have come across frost on the surface of the glass window, grass, flowers, roads, etc. Children especially love watching them and trying to figure out what it might be. How does frost form? This is a common question that you may expect from your children.

How Does Frost Form: DIY Science Project Ideas for Kids

You need to tell them in understandable terms so that they know the reason behind its formation. Before that, teach them what frost is and give examples of objects on where it is formed. Sometimes, young children might not understand if you teach them verbally or textually; instead, you can opt for science experiments for kids to demonstrate the concepts to children. 

When the temperature is freezing, the water vapor comes into contact with the solid surface to form ice. It is a crystal ice that may be visible to the eyes. There are different types of frost that you must know, such as hoar, advection, window, white and black frost. Prior to that, children must have a basic understanding of how frost forms. You can demonstrate this concept with the help of an experiment where they closely observe the changes and understand the formation easily. How does frost form? This can be one of the science project ideas for kids in school. 

Step-by-Step Instructions on How Does Frost Form Experiment

During the winter season, children must have seen frost but do not know how it is formed. Therefore, you can show them the process of deposition using materials available at home. Demonstrating science experiments for toddlers and preschoolers helps them grasp the information that you want them to learn easily. They will observe and analyze the experiment that they are performing carefully and come to a conclusion. Let us check out an experiment that shows how frost is formed. 

Aim of the Project 

To experiment and observe the formation of frost using the materials available at home. Record the result of the experiment. 

Materials Required: 

  • Two glass jars
  • Ice cubes 
  • One tablespoon of salt 
  • Sticky notes
  • A marker
  • Cold water 
  • Thermometer
  • Refrigerator


  • Take a glass jar and add a few cubes of ice into it. 
  • Label the glass jar as A on the sticky notes and paste it on the jar. 
  • Then, fill the water and add a tablespoon of salt into the jar. 
  • Take another glass jar and pour some water into it. 
  • Label the jar as  B on the sticky notes and paste it on the jar. 
  • Record the temperature of both the jars. 
  • Keep the jar in the refrigerator for 5 mins. 
  • Take the jars outside the freezer and observe the changes. 


It was observed that the glass jar A consisting of ice cubes and salt showed frost compared to the jar B consisting of only water after 5 mins. Jar A showed ice crystals on the surface. There is a chemical reaction happening between salt and ice which makes the water reach below freezing point resulting in the formation of frost on the surface of the jar. Frost is formed when the water vapor in the air changes into ice crystals on the solid surface. It forms when the temperature is too low. 

What is Frost?

Frost is a solid ice crystal formed when the water molecule in the air changes into ice on the solid surface. It is usually formed in the cold areas on the surface of any objects that might be exposed to low temperatures. This process is called as deposition, which is opposite to evaporation.  Frost is generally seen on plants, grass or a glass window. This is formed at night when the temperature is too cold. It basically forms below the dew point and appears like ice crystals on the solid surface. When the temperature increases, the frost starts melting down. 

If the solid surface reaches below the dew point, there will be the formation of frost. To make children understand how frost forms, you must teach them about types of frost, their effects on plants and some of the fun facts about frost. 

Types of Frost 

The different types of frost are mentioned below: 

  • Hoar frost: These frosts are generally formed outside the cooler surface. It is classified further based on where it is formed. For example, the air hoar is formed on the branches of the tree and the surface hoar on the snow. 
  • Advection frost: These are collections of ice crystals that form when the cold wind blows in the air. For example, on a branch of a tree or a pole. 
  • Window frost: These are formed on the glass window when the outside temperature is freezing and is warm inside. It can be formed when the temperature outside is too cold. In the winter morning, this is the first thing that we observe which looks absolutely beautiful. 
  • Black frost: These are formed on the crops when the temperature is too low, which enables them to die, appearing black in color. Hence, it is called a black frost or killing frost.  
  • Rime: This is a type of frost that is formed quickly on the solid surface under windy conditions. 

Effects of Frost 

Some of the effects of frost on plants are mentioned below:

  • Tender plants can be easily damaged due to the frost. It can freeze the water content in the plants required for their growth and development. For example, tomatoes, grapes, zucchini, etc. Sometimes, even stronger trees cannot withstand the frost. 
  • Frost can create stress for the farmers in the agricultural sectors. They try to figure out different methods to overcome the damage of crops due to frost. Farmers and people from the agricultural sector use sprays or an organism that can resist the frost from damaging the yields. 

Fun Facts about Frost 

Some of the fun facts about frost are mentioned below:

  • Frost can appear as a hair-like shape that makes it look like a spike. 
  • It is formed when the water freezes to 32o Fahrenheit.
  • Frost can damage the plants easily. 
  • It is formed on the surface of the solid surface. 
  • It has a powdery white appearance on the solid surfaces. 
  • Greenhouses are built to protect the plants from frost.
  • The frost is formed below the dew point. 
  • There are four factors that contribute to the formation of frost, such as low temperature, clear sky, high humidity and low wind. 
  • Most of the tropical areas do not observe frost due to the temperature that does not go below freezing point. 
  • There are few plants that can withstand frost, such as beetroot and potatoes. 
  • The temperature of the surface is an important factor for frost formation. 

Benefits of Learning about How Does Frost Form

The benefits of learning about frost formation are mentioned below:

  • Enables children to understand the concept of frost. 
  • Increases knowledge on how frost is formed.
  • Enables children to perform experiments on frost so that they can understand the concept easily.
  • Develops observational and analytical skills in children.
  • Motivates children to gain deeper knowledge on frost.
  • Enables children to explore and observe the objects where frost is formed.
  • Helps in identifying the different types of frost found in the environment.
  • Enables children to perform experiments related to frost easily. 
  • Imparts scientific knowledge about frost to children. 
  • Enables children to learn about the different weather conditions and temperature while learning about frost. 
  • Enables children to understand the harmful effects of frost on plants. 
  • Stimulates the development of the brain while performing easy science experiments at home. 
  • Improves knowledge about the factors responsible for frost formation.  

To know more information, explore science games for kids, STEM activities for kids in the kids learning section at Osmo.

Frequently Asked Questions on How Does Frost Form?

How does frost form?

Frost is an ice crystal formed when the water vapor in the air comes into contact with cold surfaces during low temperatures. It is observed on the surface of leaves, plants, glass windows, etc.

What are the benefits of learning about frost?

The benefits of learning about frost are that it helps in understanding the facts behind its formation. Besides this, they will learn about its types, effects and examples where the frost is formed.