Investigations 03
The thicker the substance, the less viscous (runny) it is.

Investigations 03

In this, the last of three KS2 Science quizzes on investigations, we take an overview of how to carry out experiments, the equipment to use, the variables to change, what to measure and how to record our results.

Deciding how to carry out an investigation can be tricky. Which variables should you keep the same and which ones should you measure? Added to that are the collection of results - how should you record them and how can you work out what you've learned? The more experiments you do - not just at school, but at home or outside too - the better you will get at doing them. Experience is a great teacher!

Do you know how to carry out fair investigations? What is the best way of recording your results? See how well you have developed these scientific skills by trying this third Investigations Quiz.

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  1. You have built a catapult as part of an investigation of forces. Changing the mass (weight) of the object you place in the catapult could test which of the following?
    You could see if different weights are thrown further, shorter or equal distances
  2. Using a catapult to investigate whether weight affects the distance the object is propelled, what would you need to measure in order to collect results?
    The most practical measurement would be distance travelled. It would be very difficult to measure how long it took the object to land
  3. If you were investigating how well water dissolves different materials, how should you design the investigation?
    We are investigating how well water dissolves different materials so we are only interested in how much of each material is dissolved
  4. If you were investigating how well water dissolves different materials, you would need to add solute (the material being dissolved) until the water reached what point?
    A solution is saturated when it can no longer dissolve any new matter
  5. If you were investigating how well water dissolves different materials, what would you measure?
    We are looking at how well a material is dissolved in water so the best way to find out is too see how much of it can be dissolved
  6. What unit would you use to measure the amount of a solute which can be dissolved in water?
    Grams measure weight or mass so they are the best unit to use
  7. If you were investigating the viscosity ('runny-ness') of different substances, which of the following could you do?
    Remember that if you change two variables (substance and surface temperature), you will no longer have a fair test
  8. If you were investigating the viscosity ('runny-ness') of different substances by allowing them to 'run' down a surface, what variable would you measure?
    Viscous (runny) substances will flow down the surface faster than less viscous ones
  9. Which unit would you use to measure the time substances take to 'run' down a surface?
    Time is measured in seconds, minutes or hours
  10. Which one of the following could be a conclusion for an investigation into the viscosity (runny-ness) of substances?
    Conclusions will usually include words like 'more' or 'less', or words ending in '-er': i.e. 'The colder the temperature, the more slowly seeds germinate'

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