Mon Prof Augmenté
Science: Age 9
27 illustrated Science lessons for Age 9.
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Why drying turns tobacco leaves yellow A fresh tobacco leaf is green because it is full of chlorophyll. When the leaf dries in warm, dim air, the chl… -
Why guitars have a hollow box A string on its own makes only a tiny sound because it moves very little air. A hollow box with a hole shakes … -
Why We Have Day and Night The Earth spins like a top, making one full turn each day. The side facing the Sun has daytime, and the side f… -
Pouring Off Clear Water When muddy water is left to stand, the soil sinks and settles at the bottom. Then the clearer water on top can… -
Rain on Soil and Pavement Rain falls on a hillside. Some water sinks into soil, while water on pavement and roofs flows quickly to a riv… -
Magnet Poles A magnet has two poles, often shown as a red end and a blue end. Opposite poles pull together, while matching … -
Light Through a Tiny Hole A bright object shines light into a dark box through a tiny hole. The straight rays cross at the hole and make… -
Eardrum and Tiny Bones A thin skin called the eardrum stretches across the ear canal. When sound reaches it, the eardrum shakes and p… -
Water's Sky Journey Water from a lake turns into vapor and goes up into the air. High up it cools, clings to tiny specks, makes dr… -
Plastic in the Ground Plastic is made from petroleum, which comes from deep underground. Unlike a leaf, plastic does not rot away, s… -
Tropical Storm Reaching Land A tropical storm gets its power from warm ocean water. When it moves over land, it loses that warm, wet supply… -
Bean Growth in Four Jars Four jars show a bean at different steps. You can see a root, a shoot, a split seed coat, and early leaves.… -
Molten Young Earth The young Earth was a hot, glowing ball of rock. Impacts and heat from inside kept its surface molten for a ve… -
Warm Air Makes a Cloud The sun warms a lake and a field, and warm, wet air floats upward. High up the air gets cold, and the water in… -
Prism and Rainbow White sunlight looks plain, but it is made of all the rainbow colors mixed together. When it passes through a … -
Soap's Two Ends A soap molecule has a round head that likes water and a wavy tail that likes grease. When soap meets water and… -
Earth's Cracked Shell Earth's outer shell is not one solid piece. It is cracked into large rigid pieces that slowly shift against ea… -
From Bone to Stone A dead dinosaur can become a fossil if it is buried in mud or sand very quickly. Over millions of years, miner… -
Dry flake wakes A slime mould can dry into a brittle resting flake when food and water run out. When water touches it, it swel… -
Inside a Green Leaf A green leaf takes in sunlight, water, and a gas from the air. Its cells use these to make sugar for food and … -
Drifting Plates Earth's outer shell is cracked into big pieces called plates. These plates move very slowly, only a few centim… -
Seed to Flower A seed lying in the soil wakes up when it gets water and warmth. Little by little it grows roots, a stem and l… -
Ant Scent Messages Ants make a shared smell together. They read tiny smell messages with their antennae.… -
A Circuit That Lights a Bulb Electricity can only flow when it has a complete path to travel all the way around. This loop of parts makes t… -
Inside a Volcano A volcano is a mountain with hot melted rock inside it. When the melted rock pushes up through a narrow tube, … -
The Sun and Its Planets The Sun is a huge glowing star at the center of our solar system. Planets travel around it along paths called … -
The Parts of a Flowering Plant A flowering plant is built from four main parts that work together. The roots drink water, the stem carries it…