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Science 9

Cambridge Lower Secondary Science Stage 9

Grade 8 · 9 units · 40 sections · 753 questions

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Unit 1: Photosynthesis and the carbon cycle →

  1. 1.1Photosynthesise.g. Which variable does Arun change? · 24 questionsPractice
  2. 1.2More about photosynthesise.g. Why is the leaf put in hot alcohol? · 32 questionsPractice
  3. 1.3The carbon cyclee.g. Which process takes carbon dioxide out of the air? · 19 questionsPractice
  4. 1.4Climate changee.g. Why does the CO₂ line wiggle each year? · 18 questionsPractice

Unit 2: Properties of materials →

  1. 2.1Atomic structure and the Periodic Tablee.g. How many neutrons are in a carbon atom? · 32 questionsPractice
  2. 2.2Trends in groups within the Periodic Tablee.g. Is iodine a solid, liquid or gas? · 23 questionsPractice
  3. 2.3Why elements react to form compoundse.g. What is the symbol for a lithium ion? · 19 questionsPractice
  4. 2.4Simple and giant structurese.g. Why is graphite soft? · 20 questionsPractice

Unit 3: Forces and energy →

  1. 3.1Densitye.g. What is the density of 170 g of brass in 20 cm³? · 21 questionsPractice
  2. 3.2Heat and temperaturee.g. Which bowl of soup has more heat? · 19 questionsPractice
  3. 3.3Conservation of energye.g. 1000 J in, 850 J wasted: how much useful? · 16 questionsPractice
  4. 3.4Moving from hot to colde.g. Which way does thermal energy move? · 20 questionsPractice
  5. 3.5Ways of transferring thermal energye.g. Why is a pot handle made of wood? · 17 questionsPractice
  6. 3.6Cooling by evaporatione.g. How does sweat cool the skin? · 15 questionsPractice

Unit 4: Maintaining life →

  1. 4.1Plants and watere.g. Why does variety A take up more water? · 16 questionsPractice
  2. 4.2Transpiratione.g. Mean loss of mass per day · 15 questionsPractice
  3. 4.3Excretion in humanse.g. Which organs filter the blood? · 17 questionsPractice
  4. 4.4Keeping a fetus healthye.g. Does smoking affect birthweight? · 17 questionsPractice

Unit 5: Reactivity →

  1. 5.1Reactivity and displacement reactionse.g. Will copper displace iron? · 26 questionsPractice
  2. 5.2Using the reactivity series and displacement reactionse.g. Which metal welds rails? · 15 questionsPractice
  3. 5.3Saltse.g. Which acid makes sulfates? · 24 questionsPractice
  4. 5.4Other ways of making saltse.g. Which gas turns limewater milky? · 23 questionsPractice
  5. 5.5Rearranging atomse.g. 15 g of iron + 9 g of sulfur makes? · 23 questionsPractice

Unit 6: Sound and space →

  1. 6.1Loudness and pitch of sounde.g. Which wave is the loudest? · 18 questionsPractice
  2. 6.2Interference of sounde.g. Two waves reinforce: what is the amplitude? · 16 questionsPractice
  3. 6.3Formation of the Moone.g. What collided with the Earth? · 15 questionsPractice
  4. 6.4Nebulaee.g. Which nebula gives out its own light? · 16 questionsPractice
  5. 6.5Tectonicse.g. Which layer contains convection currents? · 16 questionsPractice

Unit 7: Genes and inheritance →

  1. 7.1Chromosomes, genes and DNAe.g. Where are chromosomes found? · 17 questionsPractice
  2. 7.2Gametes and inheritancee.g. How many chromosomes in a sperm cell? · 15 questionsPractice
  3. 7.3Variatione.g. Mean number of prickles on a holly leaf · 15 questionsPractice
  4. 7.4Natural selectione.g. Why are more lizards born with blue tails? · 16 questionsPractice

Unit 8: Rates of reaction →

  1. 8.1Measuring rates of reactione.g. Average rate between 30 and 60 s · 18 questionsPractice
  2. 8.2Surface area and the rate of reactione.g. Why does powdered zinc react faster? · 16 questionsPractice
  3. 8.3Temperature and the rate of reactione.g. Why does heating speed up a reaction? · 15 questionsPractice
  4. 8.4Concentration and the rate of reactione.g. Which concentration reacts fastest? · 15 questionsPractice

Unit 9: Electricity →

  1. 9.1Parallel circuitse.g. What current flows in the other branch? · 21 questionsPractice
  2. 9.2Current and voltage in parallel circuitse.g. What voltage is across each parallel lamp? · 19 questionsPractice
  3. 9.3Resistancee.g. 12 V and 4 A: what is the resistance? · 18 questionsPractice
  4. 9.4Practical circuitse.g. What does turning up a variable resistor do? · 16 questionsPractice