Different objects allow different amounts of light to pass through them. Objects …
Different objects allow different amounts of light to pass through them. Objects can be transparent (light passes through them), translucent (some light passes through, but some light is diffused), or opaque (light does not pass through them). The opacity of different objects can make them more or less useful for certain real-world purposes.
STEM Bites are a project of the Oregon STEM Hub network. This lesson adapted from a contribution by the St. Helens Public Library and the Northwest STEM Hub.
Surface tension is caused by neighboring water particles being very slightly attracted …
Surface tension is caused by neighboring water particles being very slightly attracted to one another — this allows water to bead and lets water strider bugs walk on water. But there are limits to the attractive forces between water molecules, and the strength of those forces can be changed by changing the temperature of the water or by mixing other substances into the water. In warmer water the molecules are moving more, so the surface tension is less. That is why warm water is used for cleaning.
STEM Bites are a project of the Oregon STEM Hub network. This lesson adapted from a contribution by the St. Helens Public Library and the Northwest STEM Hub.
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