Red Line 4, Coursebook

A project English and Science 106 one hundred and s i x Step 1: What do we need energy for? What do we need energy for? Talk in groups and make clusters. Step 2: Find out about energy changes a) Read this page from an English Science book: b) Which energy is it? Use the information in the pictures and the text. 1. … energy is another word for ‘heat’. 2. … energy is the energy stored in food, fuels and batteries (and muscles!). 3. … energy is the energy in objects that move. 4. … energy is the energy stored in objects that have been raised. stored !stC:d? – gespeichert, muscle !*m0sl? – Muskel, chemical !*kemIkl? – chemisch , kinetic !kI*netIk? – kinetisch , potential !pEU*tenSl? – potentiell , thermal !*T3:ml? – thermisch , to spend !spend? – einsetzen, to disappear !dIsE*pIEr? verschwinden, to use up !ju:z-*0p? – aufbrauchen, sequence !*si:kwents? – Abfolge, atom !*xtEm? – Atom, molecule !*mOlIkjU:l? – Molekül, material !mE*tIEriEl? – Stoff, amount !E*maUnt? – Menge, heat !hi:t? – Hitze, fuel !*fju:el? – Treibstoff, to raise !reIz? – hochheben g To do work, you have to spend energy. But, like money, energy doesn’t disappear when you spend it. It goes somewhere else! People talk about ‘using energy’, but energy is never used up. It just changes into different forms. The pictures above show a sequence of energy changes. The last one is from kinetic to thermal energy. When the stone hits the wall, it makes the atoms and molecules in the stone and the wall move faster, so the materials get hotter. During each change, the amount of energy stays the same. … and falls. A stone is thrown … energy stored in muscles stone moves through the air stone at highest point stone falls stone hits wall chemical energy kinetic energy potential energy kinetic energy thermal energy adapted from: Complete Physics – by Stephen Pople potential chemical thermal kinetic E A project Nur zu Prüfzwecken – Eigentum des Verlags öbv