Free AQA GCSE Physics (8463) Exam Questions and Answers

Figure 1 shows water being heated. Eventually the water changed into steam. Complete the sentences. Choose answers from the box. Each answer may be used once, more than once or not at all. greater than | less than | the same as The distance between the particles in steam is ____ the distance between the particles in liquid water. The density of steam is ____ the density of liquid water.

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Figure 1 shows water being heated. Eventually the water changed into steam. Figure 2 shows how the temperature of the water varied with time. What is the name of the process that is taking place between points A and B? Give a reason for your answer. Process ____ Reason ____

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Figure 1 shows water being heated. Eventually the water changed into steam. A mass of 0.063 kg of water was turned into steam. The specific latent heat of vaporisation of water is 2 260 000 J/kg Calculate the thermal energy transferred to the water to turn it into steam. Use the equation: thermal energy for a change of state = mass × specific latent heat Energy = ____ J

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Figure 1 shows water being heated. Eventually the water changed into steam. The mass of the steam was 0.063 kg The volume of the steam was 0.105 m³ Calculate the density of steam. Use the equation: density = mass/volume Choose the unit from the box. kg | m³ / kg | kg / m³ Density = ____ Unit ____

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Polonium-210 (²¹⁰₈₄Po) is a radioactive isotope that decays by emitting alpha radiation. Which is the correct decay equation for polonium-210? Tick (✓) one box.

• AA. ²¹⁰₈₄Po → ²¹⁴₈₆X + ⁴₂He
• BB. ²¹⁰₈₄Po → ²⁰⁶₈₆X + ⁴₂He
• CC. ²¹⁰₈₄Po → ²⁰⁶₈₂X + ⁴₂He

Polonium-210 (²¹⁰₈₄Po) is a radioactive isotope that decays by emitting alpha radiation. Why is alpha radiation dangerous inside the human body? Tick (✓) one box.

• AA. Alpha radiation is electromagnetic radiation.
• BB. Alpha radiation is highly ionising.
• CC. Alpha radiation is very penetrating.

Polonium-210 (²¹⁰₈₄Po) is a radioactive isotope that decays by emitting alpha radiation. Figure 3 shows how the mass of a sample of polonium-210 changes with time. Determine the change in mass of the sample of polonium-210 between 50 and 150 days. Change in mass = ____ mg

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Estimate the mass of polonium-210 remaining after 300 days.

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Nuclear radiation can cause ionisation. Complete the sentences. Choose answers from the box. a negative | an electron | a neutron | a positive | a proton | a zero An atom becomes an ion when it loses ____ . The resulting ion has ____ charge.

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Figure 4 shows a person sliding down a zip wire. Describe how the vertical height of the tower could be measured accurately.

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