Forces
In this lesson, we’re going to look at what forces are and how they act on objects. We’ll be particularly interested in the common forces that can act on obje...
Simple Machines
Our lives are made easier by the use of machines. Machines are energy or force converters. They convert energy of one kind into another, more useful one. In...
Gravity
In this lesson, we’re going to explore the effects of gravity on the Earth. First, we’ll talk about what gravity is, then we’ll have a look at Newton’s...
Solar system
In this lesson, we’re going to look at the reasons why our solar system actually is a solar system. Why do the planets orbit the Sun? And why do moons and s...
Food Chains
In this video, we’re going to talk about food chains. Food chains show the ways in which organisms in a habitat feed: who produces food, and who eats who. For exa...
Ecology
In this video lesson, we’re going to talk some more about ecology. In particular, we’re interested in the relationships between organisms within ecosystems. ...
Trophic levels of food chains
In this lesson, we’re going to talk some more about ecosystems and food chains. In particular, we’ll be interested in the feeding or trophic levels of food chains...