1) What is the control variable? a) The thing you change in an investigation b) The thing you measure in an investigation c) The thing you keep the same in an investigation d) The equipment you use in an investigation 2) Why do we need water? Pick the BEST answer. a) To live b) To stay hydrated c) To give us energy d) To keep our blood flowing and to remove wasteTo keep our lungs open 3) Which organelle is the site of photosynthesis? a) Cell wall b) Mitochondria c) Chloroplast d) Vacuole 4) Which of these organs in the digestive system has the lowest pH? a) Liver b) Oesophagus c) Stomach d) Rectum 5) Complete the equation: Acid + Metal --> a) Salt + Hydrogen b) Salt + Water c) Salt + Oxygen d) Salt + Carbon Dioxide 6) Pick the energy store a) Friction b) Thermal c) Air resistance d) Magnetic attraction 7) What happens to the current in a parllel circuit? a) It stays the same in all the branches b) It is shared between the branches 8) What is a compound? a) One kind of atom b) Two or more different atoms mixed together. c) Two or more different atoms bonded together d) Two or more different atoms having a nice chat down the pub.

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