Acids and bases are classes of materials that have different properties. Acid-base indicators change color depending on whether they are in acids or bases. Blueberries contain a substance called ...

A new study analyzing 20 years of data has found that our oceans have changed color, indicating a significant shift in marine ecosystems that is likely due to human-caused climate change. For decades, ...

Note: This video is designed to help the teacher better understand the lesson and is NOT intended to be shown to students. It includes observations and conclusions that students are meant to make on ...