1.Read the abstract. Then, choose the correct answers.
1.What is the hypothesis of the experiment?
A. Coolers with larger hoses are more efficient.
B. Additional hoses will improve cooler function.
C. Cheaper hoses are just as effective as more expensive hoses.
D. Smaller hoses are more likely to become damaged.
2.In the experiment, what is the independent variable?
A. the cooler efficiency
B. the size of the hoses
C. the price of materials
D. the change in the control group
3.What is NOT true of the experiment?
A. It addressed the problem of cooler efficiency.
B.It yielded some unexpected results.
C.It included two test groups.
D.It supported the hypothesis.
2.Match the words or phrases (1-8) with the definitions (A-H).
1.result 5.observation
2. Testable 6. independent variable
3. Evaluate 7. control group
4. hypothesis 8. experimental group
A. a group that receives the treatment being tested
B. able to be proven true or false
C.to carefully study and assess something
D. a fact that is discovered through closely watching something
E.an idea about something that has not been proven correct
F. something that is manipulated in an experiment between groups
G. a group that does not receive the treatment being tested
H. something that happens because of some other event
3.Listen to a conversation between two mechanical engineers. Mark the following statements as true (T) or false (F).
1. The experimental group contained smaller hoses.
2.The woman expects the results to support the hypothesis.
3.Listen again and complete the conversation.
4.Listen again and complete the conversation.
Engineer1: So was that 1 you tested?
Engineer 2: It's a little 2 Our hypothesis is that smaller hoses increase efficiency.
Engineer 1: How'd you 3
Engineer 2: We 4__________of coolers. One group had normal hoses and the other had smaller ones.
Engineer 1: Oh, and then you measured 5 in their efficiency levels?
Engineer2: That’s right. The testing is finished, but we're 6_________the results.
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