1) What happens when ice is warmed? a) It melts b) It boils c) It evaporates 2) What happens when water is cooled to OoC a) It boils b) It freezes c) It melts 3) Which state of matter is ice? a) solid b) liquid c) gas 4) What happens if water is heated to 100oC a) It melts b) It freezes c) It boils 5) When water boils it evaporates and becomes... a) ice b) steam c) angry 6) Which state of matter is steam? a) solid b) liquid c) gas 7) Which of these is the particle arrangement of liquid? a) b) c) 8) Solids hold their shape because the particles are arranged together tightly. a) true b) false 9) We can see all gases. a) true b) false 10) Is melting ice a reversible or irreversible change? a) reversible b) irreversible 11) If we boil water so it evaporates as steam can we turn it back into liquid? a) yes b) no 12) A reversible change is a sign of..? a) a chemical reaction b) a physical reaction 13) Is melting chocolate reversible? a) yes b) no 14) Chemical reactions are a) reversible b) irreversible 15) Which of these are signs that a chemical reaction has happened? Choose 4 a) a new smell is made b) solids become liquids c) there is a temperature change d) there is a colour change e) bubbles are made 16) Which of these are examples of a chemical reaction? Choose 3 a) rusting metal b) melting chocolate c) folding paper d) burning wood e) rotting fruit 17) Which of these statements is true about physical changes? a) a new substance is created b) the substance changes but nothing new is created 18) What kind of change can we see when a firework goes off? a) chemical b) physical

Chemical & Physical Changes

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