context: How to acidify urine
Eat the right kinds of veggies.
In general, a vegetable-rich diet is a great way to decrease the ph of urine. A lower ph signifies a higher acidic level.
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next sentence for the context: However, there are certain vegetables that should be avoided, since they have the opposite effect of making urine more basic or alkaline (with a higher ph level). Eat plenty of servings of corn, white beans, and lentils, since these are especially effective for acidifying urine.

context: How to teach chemistry
Obtain a bachelor's degree in chemistry.
Many schools require a bachelor's degree specific to chemistry in order to teach the subject. It's important to have a firm understanding of chemistry in order to be able to teach it to your students.
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next sentence for the context: Some schools only require a basic science certification on top of a bachelor's in teaching, but if you are serious about teaching chemistry, you need a bachelor's specific to the subject. Get all the necessary licenses or certifications.

context: How to protect bathroom grout
Dry your bathroom after every shower or cleaning.
Use a squeegee, towel or cloth to dry all tiles after they get wet. Make sure you have a bathroom fan or window that can suck the excess moisture out from the air.
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next sentence for the context: If you do not do this, grout will absorb excess moisture, which will turn into mold and mildew. It will stain and breakdown the structure of the grout, causing it to crumble prematurely.

context: One tuber comes across the rapids bobbing up and down through the rapids. The second tuber comes through the rapids. The third tuber goes through the rapids. the camera
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next sentence for the context:
zooms out as the tubers pass through the rough water and end up in the calm waters of the river.