The cards Question What does a pure substance contain? Tap to flip Answer Only one type of chemical. Question What is true of the melting point and boiling point of a pure material? Tap to flip Answer They are fixed. Question How does a mixture melt or boil, compared with a pure material? Tap to flip Answer Over a range of temperatures, not at one fixed temperature. Question What is a mixture? Tap to flip Answer A material containing two or more different substances that can be physically separated. Question What is an impurity? Tap to flip Answer A chemical present in a material in very small amounts that can change the material's properties. Question What effect do impurities have on a material's melting and boiling points? Tap to flip Answer They change them. Question In science, does calling a substance 'pure' describe where it came from or what its particles are? Tap to flip Answer What its particles are: the scientific meaning is about particle composition, not a single source as in 'pure orange juice'. Question On what piece of apparatus is mass measured, and in what unit? Tap to flip Answer On a balance, in grams. Question What is volume? Tap to flip Answer How much 3D space a material takes up. Question What is a scientific drawing of a piece of apparatus? Tap to flip Answer A 2D representation of it. Question What is a solute? Tap to flip Answer A substance that has dissolved into a solvent. Question What is a solvent? Tap to flip Answer A substance into which a solute dissolves. Question What forms when a solute and a solvent combine? Tap to flip Answer A solution. Question When substances are mixed, how does the total mass of the mixture compare with the masses of the substances? Tap to flip Answer It equals their masses added together: mass is conserved. Question What is Brownian motion? Tap to flip Answer The random movement of particles in a fluid, caused by collisions with particles of the surrounding medium. Question What is diffusion? Tap to flip Answer The movement of particles from where there are many until they are randomly spread throughout a medium. Question Which two states of matter can be described as fluids? Tap to flip Answer Liquids and gases. Question At higher temperatures, how do particles in a gas or solution move? Tap to flip Answer More quickly. Question Why is a suspension not a solution? Tap to flip Answer Its solid particles can be seen and eventually settle over time. Question What does it mean if a substance is insoluble in a solvent? Tap to flip Answer It does not dissolve in that solvent. Question When a substance dissolves, are the forces of attraction between its particles broken? Tap to flip Answer No, they are overcome: they still act between the particles but are weaker than before. Question Why can the total volume of a mixture be less than expected? Tap to flip Answer Particles of one substance can fit into the spaces between particles of the other. Question What type of process are both dissolving and melting? Tap to flip Answer Physical processes. Question In an investigation, what is the independent variable? Tap to flip Answer The variable that is changed. Question In an investigation, what is the dependent variable? Tap to flip Answer The variable that is measured or observed; it changes as a result of varying the independent variable. Question What is a control variable? Tap to flip Answer A variable kept the same to ensure a fair test. Question What is a fair test? Tap to flip Answer A test in which only one variable is changed and all other variables are controlled. Question What makes an experiment repeatable? Tap to flip Answer The same person using the same method gets the same or similar results again. Question What makes an experiment reproducible? Tap to flip Answer A different person using the same or a similar method gets the same or similar results. Question Solubility depends on the solute, the solvent and what else? Tap to flip Answer The temperature. Question What is an anomalous result? Tap to flip Answer A result that does not fit an obvious trend. Question What is continuous data? Tap to flip Answer Data that can take any value within a range, e.g. temperature, mass or height. Question What type of chart is usually used when one variable is discrete? Tap to flip Answer A bar chart. Question Which variables should a conclusion refer to when describing the data? Tap to flip Answer Both the independent and the dependent variables. Question What is a saturated solution? Tap to flip Answer A solution in which no more solute can dissolve in the solvent at a given temperature. Question What may happen to a dissolved solute as its solution cools? Tap to flip Answer It may become insoluble. Question What can a line of best fit be used to predict? Tap to flip Answer Unknown values when one variable is known. Where this deck sits in the curriculum Curriculum National Curriculum for England Stage Key stage 3 (Years 7–9) Course KS3 Science Unit Solutions England's National Curriculum sets what is taught; the units and their order are Oak National Academy's. Flash Feed is not affiliated with Oak or any exam board.
How this deck was checked On 2026-11-02, every card was compared with its source: the lessons of Oak National Academy, a public body funded by England's Department for Education that publishes lessons for the national curriculum. Because the cards come from those lessons, no second source was sought. The comparison was done automatically, not by a teacher, so a card can still be wrong. Flash Feed is not affiliated with any source named here.
Sources Total: 11 · primary: 11 · second publisher: 0
Show the other sources (9) Found a mistake? Write to support@flashfeed.app .
A Science lesson by Oak National Academy licensed under Open Government Licence (OGL)
Flash Feed