The phosphorus cycle

https://www.sciencelearn.org.nz/resources/961-the-phosphorus-cycle
Phosphorus is a chemical element found on Earth in numerous compound forms, such as the ...

Classification system

https://www.sciencelearn.org.nz/resources/1438-classification-system
In the 18th century, Carl Linnaeus published a system for classifying living things, which has ...

The nitrogen cycle

https://www.sciencelearn.org.nz/resources/960-the-nitrogen-cycle
Nitrogen is the most abundant element in our planet’s atmosphere. Approximately 78% of the ...

Ocean salinity

https://www.sciencelearn.org.nz/resources/686-ocean-salinity
There are many chemicals in seawater that make it salty. Most of them get there from rivers ...

Scientific modelling

https://www.sciencelearn.org.nz/resources/575-scientific-modelling
In science, a model is a representation of an idea, an object or even a process or a system ...

Measuring biodegradability

https://www.sciencelearn.org.nz/resources/1543-measuring-biodegradability
In nature, different materials biodegrade at different rates. If you throw your apple core into ...

Human impact on rivers

https://www.sciencelearn.org.nz/resources/440-human-impact-on-rivers
Human beings have an impact on river ecosystems. The relationship living organisms have with ...

Cleaning up the oil spill

https://www.sciencelearn.org.nz/resources/1140-cleaning-up-the-oil-spill
On 5 October 2011, the cargo vessel Rena ran aground on the Astrolabe Reef. The ship was ...

River ecosystems

https://www.sciencelearn.org.nz/resources/439-river-ecosystems
The ecology of the river refers to the relationships that living organisms have with each other ...

Sound on the move

https://www.sciencelearn.org.nz/resources/572-sound-on-the-move
Sound is a pressure wave, but this wave behaves slightly differently through air as compared to ...

Ocean density

https://www.sciencelearn.org.nz/resources/687-ocean-density
The density of seawater plays a vital role in causing ocean currents and circulating heat ...

Ocean temperature

https://www.sciencelearn.org.nz/resources/707-ocean-temperature
The temperature of the ocean determines what form the water takes. Most of the ocean is liquid ...

Classifying and identifying ferns

https://www.sciencelearn.org.nz/resources/1104-classifying-and-identifying-ferns
Scientists currently consider that New Zealand has approximately 230 species of fern in about ...

What is a fern?

https://www.sciencelearn.org.nz/resources/1103-what-is-a-fern
There are ferns in most New Zealanders’ backyards and local environments. Ferns are green ...

Bioindicators

https://www.sciencelearn.org.nz/resources/1538-bioindicators
A bioindicator is a living organism that gives us an idea of the health of an ecosystem. Some ...

Adapting to marine habitats

https://www.sciencelearn.org.nz/resources/1126-adapting-to-marine-habitats
Being able to adapt is a matter of life or death. In a perfect world, organisms would not need ...

Limestone uses

https://www.sciencelearn.org.nz/resources/472-limestone-uses
The calcium carbonate content of limestone rocks has been used from the earliest civilisations ...

Monarch butterflies

https://www.sciencelearn.org.nz/resources/511-monarch-butterflies
There is a touch of irony that, in a country famous for its unique wildlife, New Zealand’s most ...

Ecosystems

https://www.sciencelearn.org.nz/resources/993-ecosystems
What is an ecosystem? An ecosystem is made up of animals, plants and bacteria as well as the ...

Soil formation

https://www.sciencelearn.org.nz/resources/955-soil-formation
New Zealand has a wide variety of landscapes. A day’s sightseeing journey might include ...

New Zealand’s unique ecology

https://www.sciencelearn.org.nz/resources/1440-new-zealand-s-unique-ecology
New Zealand has a rich and unique range of plants, animals and fungi. The level of distinctive ...

Build a marine food web

https://www.sciencelearn.org.nz/resources/1525-build-a-marine-food-web
In this activity, students build their own food web using images of organisms from the marine ...

Butterfly defence mechanisms

https://www.sciencelearn.org.nz/resources/507-butterfly-defence-mechanisms
Butterflies are the exhibitionists of the insect world. For many invertebrates, camouflage is ...

Limestone landscapes

https://www.sciencelearn.org.nz/resources/471-limestone-landscapes
Limestone is one of the most common sedimentary rocks found in New Zealand. Eye-catching ...
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