# numbers' expression

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#### Joe

##### Member
If a chopstick is about 20 cm3, we will consume 500 m3 of wood just by using this single-use item. That is about 10,000 trees with an average height of 5m and an average diameter of 10cm. Let’s also pretend that we plant a single tree every 3m, then more 100,000 m2 of forest are disappearing every year just because people in one college use single-use chopstick in their three meals every day.

I feel very unsure of the expressions of numbers above. Could you give me some editings? It is kind of urgent. Thanks very much.
:wink:

#### Casiopea

##### VIP Member
Joe said:
If a chopstick is about 20 cm3, we will consume 500 m3 of wood just by using this single-use item. That is about 10,000 trees with an average height of 5m and an average diameter of 10cm. Let’s also pretend that we plant a single tree every 3m, then more 100,000 m2 of forest are disappearing every year just because people in one college use single-use chopstick in their three meals every day.

I feel very unsure of the expressions of numbers above. Could you give me some editings? It is kind of urgent. Thanks very much.
:wink:

cm3 (usually called "cubic centimeters," or "cc's") is a unit for volume. If you've ever listened to doctors or nurses talking about how much liquid to put in a hypodermic needle when administering a shot, they usually use "cc's" as the unit. When a doctor tells a nurse, "Give the patient 4 cc's of methodrin," he or she is telling the nurse to inject a 4 cm3 volume of methodrin into the patient.

Volume
1 cubic centimeter (cm3) is the same as 1 milliliter (1mL).
cubic milliter (m3)
milliliter squared (m2)

Height
5m (5 meters)
3m (3 meters)

Source
http://www.apologia.com/books/ecc/chemsampchap.html

#### Joe

##### Member
Casiopea said:
cm3 (usually called "cubic centimeters," or "cc's") is a unit for volume. If you've ever listened to doctors or nurses talking about how much liquid to put in a hypodermic needle when administering a shot, they usually use "cc's" as the unit. When a doctor tells a nurse, "Give the patient 4 cc's of methodrin," he or she is telling the nurse to inject a 4 cm3 volume of methodrin into the patient.

Volume
1 cubic centimeter (cm3) is the same as 1 milliliter (1mL).
cubic milliter (m3)
milliliter squared (m2)

Height
5m (5 meters)
3m (3 meters)

Source
http://www.apologia.com/books/ecc/chemsampchap.html

Thanks, Casiopea. Are there any problems with the passage I gave?

#### RonBee

##### Moderator
Joe said:
If a chopstick is about 20 cm3, we will consume 500 m3 of wood just by using this single-use item. That is about 10,000 trees with an average height of 5m and an average diameter of 10cm. Let’s also pretend that we plant a single tree every 3m, then more 100,000 m2 of forest are disappearing every year just because people in one college use single-use chopstick in their three meals every day.

You need to rewrite the first sentence some. Perhaps:
• If the average chopstick is 20 cubic centimeters, then we consume 500 cubic meters of wood per day just by using this single-use item.

The words in italics are the kinds of information needed in the sentence.

Also, one would plant so many trees per acre (or hectare), not per meter.

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