In science, a model is a representation of an idea, an object, a process or a system. Models are often used when it is difficult to...

The Earth has a finite amount of water. The water that is here today is the same water that will be here in 20 or even...

In the future, water may be our most valuable commodity. Understanding the water cycle – the continuous movement of water through the Earth's upper crust, surface...

The time it takes for water to move through the Earth’s system can vary greatly, but it means that water is continuously recycled, maintaining the conditions...

In this activity, students observe the processes of evaporation and precipitation by creating a model that simulates the water cycle. By the end of this activity,...

In this video, four New Zealand scientists – Dave Campbell, Louis Schipper, David Hamilton and Keith Hunter – talk about how only a small percentage of...

In science, a model is a representation of an idea, an object, a process or a system that is used to describe and explain phenomena that...

Using a plastic bag, students can model the water cycle. When the plastic bag is hung in a sunny window, heat from the Sun evaporates water...

We are becoming increasingly aware of our impacts on nature. There is considerable evidence that humans are responsible for disruptions and changes to local and global...

Scientists generally agree that the amount of water on Earth is finite, and that the water cycle constantly recycles water through the Earth’s systems. But how...

Find out more about water’s transformations in the water cycle. Select a label for background information and hands-on activities. To use this interactive, move your mouse...

Water is constantly recycled through the Earth’s water cycle. Use the following resources to learn about the water cycle. Related articles The water cycle Storage in...

Earth is called the blue planet due to the abundance of water. About 70% of the surface of the Earth is covered by water, and it...

An inquiry approach is a method often used in science education. The question bank provides an initial list of questions about the water cycle and places...

Transcript Water storage in the atmosphere There is always water in the atmosphere – it’s like the superhighway that moves water around the globe – but...

The water cycle is driven by energy from the sun. Liquid water is evaporated and changed into a gas. In this process, energy is absorbed (endothermic)....

The water cycle happens all around us. Changes in the state of water and the water cycle are driven by the Sun’s energy. There is no...

The water cycle contains complex interactions between the atmosphere and the land. The activity Follow the water droplet encourages students to place themselves in the water...