Passage 1
A bright smile from toothpaste and minerals
Toothpaste cleans your teeth. Abrasive minerals like silica, limestone, Aluminium oxide and various phosphate minerals do the cleaning. Fluoride which is used to reduce cavities, comes from a mineral fluorite. Most toothpaste are made white with titanium oxide, which comes from minerals called rutile, ilmenite and anatase. The sparkle in some toothpastes comes from mica. The toothbrush and tube containing the paste are made of plastics from petroleum.
Questions / Answer:
Question 1: What minerals are responsible for cleaning teeth in toothpaste?
Answer: Silica, limestone, Aluminium oxide, and various phosphate minerals.
Question 2: Where does fluoride, used to reduce cavities in toothpaste, come from?
Answer: Fluoride comes from a mineral called fluorite.
Question 3: What minerals are used to make most toothpaste white?
Answer: Titanium oxide, which comes from minerals called rutile, ilmenite, and anatase.
Question 4: What gives some toothpastes their sparkle?
Answer: Mica
Question 5: What materials are toothbrushes and toothpaste tubes typically made of?
Answer: Plastics from petroleum.
Passage 2
All living things need minerals
Life processes cannot occur without minerals. Although our mineral intake represents only about 0.3 per cent of our total intake of nutrients, they are so potent and so important that without them we would not be able to utilize the other 99.7 per cent of foodstuffs.
Questions / Answer:
Question 1: What percentage of our total intake of nutrients does mineral intake represent?
Answer: About 0.3 percent.
Question 2: Why are minerals considered potent and important for life processes?
Answer: Because without them, we would not be able to utilize the other 99.7 percent of foodstuffs.
Question 3: What would be the consequence if living things didn’t have minerals?
Answer: Life processes would not be able to occur.
Question 4: How essential are minerals for the utilization of foodstuffs?
Answer: They are crucial, as without them, the utilization of foodstuffs would not be possible.
Question 5: What role do minerals play in the overall health and functioning of living organisms?
Answer: They are vital for various biological processes and are essential for maintaining overall health and functioning.
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