Time: 50 min
Instructions:
Answer all questions
01. For each of the following items, choose the most correct answer from the given alternatives and write its letter beside the number item.
i. It is important to take note of the warning signs in the laboratory so as:
A. To work safely in the laboratory
B. We do not contaminate substances
C. To work hard
ii. A person studying about medicine is known as a:
A. A chemist
B. A dentist
C. A pharmacist
iii. The guess answers or solutions to a problem are in which step in six ways of solving scientific problem?
A. Identification of problem
B. Hypothesis formulation
C. Experimentation
iv. Which one is true about the First Aid?
A. It prevents illness
B. It prevents further infections
C. It promotes infections
v. The burns caused by hot liquids or vapour are:
A. Scalds
B. Vomiting
C. Scurs
02. Write true if the statement is correct and false when the statement is incorrect.
a) We are not allowed to test anything in the laboratory ____________________
b) A scientist uses scientific procedure to solve a scientific problem ______________________
c) Fertilizer is one of the products produced in agriculture and helps to kill weeds _____________________
d) Vomiting is loss of consciousness _____________________
e) Luminous flame is produced by a Bunsen burner when there is high supply of oxygen _____________________
03. (a) Define the following terms
i) Heat
ii) Flame
(b) Give any four (4) differences between the two types of flame produced by a Bunsen burner.
04. (a) Define First aid, and give any four (4) reasons to why is it important.
(b) Write any four (4) rules of the laboratory, during practical work.
05. (a) Explain six steps taken when solving a scientific problem.
(b) Explain any four (4) features of a good laboratory.
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