1) which of the following is the basic unit of life ? a) tissue b) atom c) organ d) cell 2) which of the following is a renewable source of energy? a) coal b) natural gas c) solar energy d) oil 3) which of the following is a state of matter? a) gas b) liquid c) solid d) all of the above 4) what is the pH of lemon juice ? a) 7 b) 6 c) 4 d) 9 5) SI unit of temperature? a) joule b) kelvin c) celsius d) fahrenheit

general science question

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