Science: Age 13

8 illustrated Science lessons for Age 13.

Rust that weighs the same Steel wool sealed in a flask with air slowly turns to rust, yet the flask weighs exactly the same before and a…
Rust in a sealed flask When steel wool rusts inside a sealed flask, the iron joins with oxygen from the air to form a new substance. …
How Earth's Plates Move Earth's rigid outer shell is broken into huge plates that slowly drift on hotter, softer rock below. Where pla…
Why Earth Has Seasons Earth's axis is tilted by 23.4°, and it always points the same way in space as Earth travels around the Sun. T…
Leaf in Sunlight A green leaf uses sunlight, carbon dioxide, and water to make sugar. It releases oxygen into the air.…
The Apple Falls Earth pulls every object toward its center. That pull gives an apple its weight and makes it speed up as it dr…
White light through a prism White light is a mixture of many colours. When it passes through a glass prism, each colour bends by a slightl…
Moon Rocks in a Sample Box A rover on the Moon picks up a rock and places it in a container. Rocks collected from different places help s…