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The polar bear s thick fur is an ________ that helps it survive in freezing Arctic temperatures.
Very good __________ of heat include copper, aluminium and silver.
_________ is the development of a species over huge amounts of time in order to survive.
_________ is a method of separating an insoluble solid from a liquid.
Proteins are _________ that your body uses to build new tissues for growth and repair.
We used magnifying glasses to _______ the changes in the caterpillar as it turned into a chrysalis.
We investigated how the length of a straw affects the _____ of the sound it makes.
Before starting the experiment, we wrote down a __________ about what would happen when we mixed the two liquids.
We made a simple ________ of sugar and water.
We dissolved sugar in _____.
