Resource Library

What is the Difference Between Accuracy and Precision?

K to 3, Grades 4 to 6, Grades 7 to 9, Grades 10 to 12

When we measure things, most people are only worried about how accurate, or how close to the actual value, they are. Matt Anticole explains what exactly precision is and how can help us to measure things better.

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Backgrounders

Specialized Cells of the Leaf System

Grades 7 to 9, Grades 10 to 12

Without leaves, there would not be life on Earth. Leaf size can vary from the tiniest leaf of the common water fern (Azolla filiculoides) that are just one mm in length, to the largest leaves of the raffia palm (Raphia regalis) measuring 25 meters in length. No matter the size, most leaves are adapted for photosynthesis. This is a very important process where plants convert light energy into sugars and oxygen.

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Backgrounders

Tropisms in Plants

Grades 7 to 9, Grades 10 to 12

One of the major differences between plants and animals is that plants cannot move from place to place to get away from an unfavourable environment or situation. But this does not mean that plants do not move at all. A tropism is plant movement in response to an external stimulus in the environment.

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Key Concepts

Astronomie

Grades 4 to 6

6^e année du primaire

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Videos

Plant Growth in the Canadian Arctic

Grades 7 to 9

Explore Research at the University of Florida: Anna-Lisa Paul, a research associate professor of horticultural sciences, explains an aspect of her research in the space biology program.

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Videos

Plant Breathing Mechanism Discovered (Carnegie Institution)

Grades 10 to 12

A tiny, little-understood plant pore has enormous implications for weather forecasting, climate change, agriculture, hydrology, and more.

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Videos

Structure And Working Of Stomata (TutorVista)

Grades 10 to 12

Stomata (the word stomata means "mouth") are small pores found in the leaves of the plant that helps in gaseous exchange during photosynthesis and respiration.

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Videos

Why Tomatoes Are Fruits, and Strawberries Aren't Berries (SciShow)

Grades 4 to 6, Grades 7 to 9, Grades 10 to 12

Did you know that bananas are berries, but strawberries aren’t? A lot of thought goes into classifying fruits and vegetables, and it all has to do with anatomy.

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Key Concepts