This Science quiz is called 'Investigations 3' and it has been written by teachers to help you if you are studying the subject at middle school. Playing educational quizzes is a fabulous way to learn if you are in the 6th, 7th or 8th grade - aged 11 to 14.
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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!
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You could see if different weights are thrown further, shorter or equal distances
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The most practical measurement would be distance traveled. It would be very difficult to measure how long it took the object to land
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We are investigating how well water dissolves different materials so we are only interested in how much of each material is dissolved
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A solution is saturated when it can no longer dissolve any new matter
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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
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Grams measure weight or mass so they are the best unit to use
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Remember that if you change two variables (substance and surface temperature), you will no longer have a fair test
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Viscous (runny) substances will flow down the surface faster than less viscous ones
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Time is measured in seconds, minutes or hours
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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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