Testing the pH of soils with litmus paper. On the left is an acidic soil, which turns blue litmus paper red. At right is an alkaline soil, which runs red litmus paper blue.
| px | px | dpi | = | cm | x | cm | = | MB |
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Creative#:
TOP15985060
Source:
達志影像
Authorization Type:
RM
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須由TPG 完整授權
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Same folder images:
acidacidityalkalialkalinealkalinitybiologicalbiologybluebotanicalbotanychemicalchemistrycolourchangecomparedcomparisoncutoutcut-outcutoutdemonstrationeartheducationexperimentgroundhorticulturalhorticulturehydrogenionconcentrationindicationindicatorlitmuspaperno-onenobodypairphredschoolschoolsciencescienceeducationsoiltwowhitebackground
acidacidityalkalialkalinealkalinitybackgroundbiologicalbiologybluebotanicalbotanychangechemicalchemistrycolourcomparedcomparisonconcentrationcutcut-outcutoutdemonstrationeartheducationeducationexperimentgroundhorticulturalhorticulturehydrogenindicationindicatorionlitmusno-onenobodyoutpairpaperphredschoolschoolsciencesciencesoiltwowhite
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