Oil - ..................... is an example for fossil fuels, burns - The car starts to move when fuel ................ inside it., Grass - ..................... is an example for biofuels, warming houses - We use fossil fuel in ..........................., huge - Electricity transferred through ............ wires to cities, pin - Diatom algae are very tiny organisms, smaller than the head of a ....................,

Theme 3 unit 3 concept 3.2 grade 4 second term

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