Unit 10. Measurements.
Instructions for mixing cement.
Concrete mixing follows a 1:2:3 mix: 1 part Portland cement, 2 parts sand, and 3 parts aggregate. However, should you desire exact measurements, use the following amounts.
Concrete Mixing Instructions (Imperial)
Ingredients:
· One 94 pound bag of Portland cement
· 15 gallons of sand
· 22 gallons of gravel
Mix the dry ingredients. Then add water in small amounts. One bag will produce about six square yards of cement. The average layer thickness is 4 inches. That's 1/3 of a foot.
Concrete mixing instructions (Metric)
Ingredients:
· One 43 kilogram bag of Portland cement
· 57 liters of sand
· 83 liters of gravel
Mix the dry ingredients. Then add water in small amounts. One bag will produce about five square meters of cement. The average layer thickness in 10 centimeters.
1. Before you read the passage, talk about these questions.
1. What are some imperial units of measurements?
2. What are some metric units of measurement?
Reading
2. Read the instructions for mixing cement. Then, mark the statements as true (T) or false (F).
1 _Forty pounds of cement is equal to 60 kilos.
2 _ Water should be added after the sand and cement are mixed.
3 _ One bag of cement will produce a layer with thickness of 5 inches or 2 centimeters.
Vocabulary
3. Match the words (1-6) with the definitions (A-F).
1 _ liter 4 _ inch
2 _ pound 5 _ gallon
3 _ kilogram 6 _ meter
A. a metric unit of mass
B. a metric unit of volume
C. an imperial unit of length
D. an imperial unit of mass
E. a metric unit of length
F. an imperial unit of volume
4. Read the sentence and choose the correct word.
1. The yard and the gallon are metric / imperial units of measurement.
2. Lay out ten yards / centimeters of cement between the building and the street.
3. The board is only five kilograms / feet long.
4. The bolt is about eight centimeters / gallons long.
5. The meter and kilogram are metric / imperial units of measurement.
5. Listen and read the instructions for mixing cement again. What way is the concrete mixed?
Listening
6. Listen to a conversation between two construction workers. Choose the correct answers.
1) What is the conversation mainly about?
A. how to make concrete harder
B. which solid and liquid ingredients are needed
C. differences between imperial and metric measurements
D. why the concrete mix is not working
2) What will the woman likely do next?
A. getmore solidingredients
B. mix the concrete again
C. convert the liquid ingredients to imperial units
D. change the dry ingredients to metric units
7. Listen again and complete the conversation.
Worker 1: This concrete mix is not turning out right. I can't 1_____ ____ what's wrong.
Worker 2: Did you use the 1:2:3 mix?
Worker 1: No, I used specific measurements.
Worker 2: Hmm, let me check your measurements Oh. I see 2 _____ _____.
Worker 1: Did I 3 ______ _______ ________ ?
Worker 2: Yeah, you used imperial units for the liquid ingredients. Then you used 4 _____ _____ for the dry ones.
Worker 1: Oh, my. Well, that will cause 5 _____ ______. I’ll be sure to use all metric. I’ll go make a new batch.
Worker 2: Glad I 6 _____ _____.
Speaking
8. With a partner, act out the roles below based on Task 7. Then, switch roles.
USE LANGUAGE SUCH AS.
I can’t figure out…
Let me take a look…
You used…
Student A: You are a construction worker. Talk to Student B about:
· a problem with a concrete mix
· a mistake with measurements
· how to fix the mistake
Student B: You are a construction worker. Talk to Student A about a problem with a concrete mix.
Writing
9. Use the instructions and the conversation from Task 8 to fill out the measurement chart.
Measurement chart
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