Digestive enzymes

https://www.sciencelearn.org.nz/resources/1840-digestive-enzymes
Enzymes are globular proteins that control biological reactions. Digestive enzymes speed up the ...

Waves as energy transfer

https://www.sciencelearn.org.nz/resources/120-waves-as-energy-transfer
‘Wave’ is a common term for a number of different ways in which energy is transferred: In ...

Food’s journey through the digestive system

https://www.sciencelearn.org.nz/resources/1849-food-s-journey-through-the-digestive-system
A look at the time it takes for food to pass through the gut from mouth to anus. In a healthy ...

Mitochondria – cell powerhouses

https://www.sciencelearn.org.nz/resources/1839-mitochondria-cell-powerhouses
Mitochondria are tiny organelles inside cells that are involved in releasing energy from food ...

Carbon cycle

https://www.sciencelearn.org.nz/resources/1569-carbon-cycle
The carbon cycle can seem like a complex process because there are many interacting parts ...

What are ceramics?

https://www.sciencelearn.org.nz/resources/1769-what-are-ceramics
A ceramic is an inorganic non-metallic solid made up of either metal or non-metal compounds ...

Digestion – breaking the large into the small

https://www.sciencelearn.org.nz/resources/1830-digestion-breaking-the-large-into-the-small
Digestion of food involves both physical and chemical processes. Through digestion, large food ...

What is clay?

https://www.sciencelearn.org.nz/resources/1771-what-is-clay
Since the earliest times, humankind has had a close association with clay. From use as a ...

The human digestive system

https://www.sciencelearn.org.nz/resources/1829-the-human-digestive-system
The human digestive system consists of a long muscular tube and several accessory organs such ...

Non-renewable energy sources

https://www.sciencelearn.org.nz/resources/1570-non-renewable-energy-sources
Energy comes from many sources, and to describe these sources we use two terms: renewable and ...

Behaviour of waves

https://www.sciencelearn.org.nz/resources/121-behaviour-of-waves
All waves behave in certain characteristic ways. They can undergo refraction, reflection ...

Rate of digestion

https://www.sciencelearn.org.nz/resources/1834-rate-of-digestion
Digestion of food involves chemical reactions that break up large food molecules into their ...

Causes of aerodynamic drag

https://www.sciencelearn.org.nz/resources/1346-causes-of-aerodynamic-drag
Aerodynamics is the study of how air flows over objects and the forces that the air and objects ...

Hormonal control of digestion

https://www.sciencelearn.org.nz/resources/1836-hormonal-control-of-digestion
It has now been well established that gut hormones have a key role in controlling food intake ...

Bone and tooth minerals

https://www.sciencelearn.org.nz/resources/1796-bone-and-tooth-minerals
The minerals found in human teeth and bones that give them their hardness and strength belong ...

Digestion chemistry – introduction

https://www.sciencelearn.org.nz/resources/1826-digestion-chemistry-introduction
Food plays an extremely important part in the lives of all humans. After ingestion, the food is ...

Insulation

https://www.sciencelearn.org.nz/resources/1006-insulation
In Antarctica, winter temperatures can vary from -70ºC to -15ºC – it is one of the coldest ...

Energy requirements of the body

https://www.sciencelearn.org.nz/resources/1835-energy-requirements-of-the-body
The macronutrients (carbohydrates, proteins, fats and oils) we consume in our diet help to ...

Measuring muscle strength

https://www.sciencelearn.org.nz/resources/1922-measuring-muscle-strength
How do you go about finding just how strong you are in a particular exercise? You could try ...

Unlocking the energy in foods

https://www.sciencelearn.org.nz/resources/1833-unlocking-the-energy-in-foods
The foods we eat supply the energy needed by the body to drive its complex chemical, mechanical ...

What is energy?

https://www.sciencelearn.org.nz/resources/1572-what-is-energy
This is both a simple and complex question. Energy is in everything – it is often described as ...

Fundamentals of waves

https://www.sciencelearn.org.nz/resources/119-fundamentals-of-waves
Seeing, hearing, feeling warmth, surfing, tuning the radio, using a cellphone – these and many ...

Pedal power

https://www.sciencelearn.org.nz/resources/1348-pedal-power
Competitive cyclists have power meters to carefully monitor their training and race ...

Healthy gut bacteria

https://www.sciencelearn.org.nz/resources/1837-healthy-gut-bacteria
For most of the time, the population of bacteria in the large intestine lives in balance within ...
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