1.Match the Key words with the definitions (1-5)  Key words: a) atom, b) billion, c) cell, d) neuron, e) organ 1. One thousand million 2. A part of the body that has a particular purpose, e.g. the heart, the liver 3. The smaller piece of a substance that can exist alone 4. A nerve cell 5. A unit of structure of living matter 2.Listen to a science lesson. Use the Strategies to complete the gaps in this summary. The brain consists of grey and (1) matter. It weighs (2) . It uses (3) of the body’s energy. It contains over (4) which make up neurons. These neurons are connected by electrical impulses. There are more possible connections in one brain than there are (5) . Neuroscientists have mapped different areas of the brain which are responsible for (6) . The areas of the brain related to controlling (7) could be compared to miniature film studios. Our eyes and ears send signals (8) , and it is our brain that interprets these signals and builds up a picture of the outside world. Scientists have also identified areas responsible for different emotions, such as (9) love and laughter. There are also different areas for different types of thinking, such as learning your own language and learning a (10) language Listen to the lesson again and answer these questions 1. How do you think the teacher feels about his subject? 2. What example does he use to explain the way the brain controls different parts of the body? 3. What does he compare to a film studio?