Mixing and dissolving The 14 questions of lesson 6 «Mixing and dissolving» of the chemistry course of Mova's primary school with their options, 76 sentences, every one parsed by Mova with its syntax tree and pragmatics. How the student did on them: the lesson at school .
t1 Your friend says: "Sugar in tea is gone, it's just sweet water now, nothing left." What could prove her wrong? wrong ✗ · ★★ t2 "why can't I just sieve the sugar outta my squash, it's too sweet" Best answer? wrong ✗ · ★★ t3 What would happen if you used ice-cold water to make a strong syrup? wrong ✗ · ★★ t4 Why is it easier to float in the sea than in a swimming pool? right ✓ · ★★ t5 Your cousin pours ground coffee into hot water and wonders why it is gritty. What is the reason? right ✓ · ★★ t6 A cartoon fish gasps in a pond on a scorching day and someone says "it's too sunny for its eyes". What is the real problem? right ✓ · ★★ t7 "chucked a whole sugar cube in, still there after ages, dunno why" What would speed it up? right ✓ · ★★ t8 Why do sugar crystals sometimes appear at the bottom of an old jar of syrup? wrong ✗ · ★★ t9 Effervescent vitamin tablets fizz in water. What do they have in common with a bath bomb? right ✓ · ★★ t10 Your brother says sand dissolves if you stir long enough. Is he right? right ✓ · ★★ e1 Which of the following statements most accurately characterises the dissolution of sugar in water? wrong ✗ · exam e2 It is given that further salt, added to water, remains undissolved at the base of the vessel. Identify the term applicable to the solution. wrong ✗ · exam e3 Select the response that is consistent with the established facts concerning the rate of dissolution of a sugar cube. wrong ✗ · exam e4 Identify the principal reason for which fish in a pond may suffer during periods of excessive heat. wrong ✗ · exam ← previous
Melting, freezing, boiling and condensing
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Oil and water, and things that won't mix
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