1. The Scientific Endeavour – Sciences for IGCSE & IB

1. The diagram below shows an experiment to investigate the time taken by the pendulum to complete sewing. When the length of the thread increases and the mass of the bob remains unchanged, the time taken for the pendulum to make complete swing increases, which statement is not correct?

Independent variable response to the change in the dependent variable.
The length of the thread is the independent variable in this experiment.
The hypothesis could be stated as ' the longer the length of the thread, the longer the time taken for the pendulum to complete one swing'.
The mass of the pop is the controlled variable.

2. Which of the quantities are needed for carrying out the scientific work? I. Patience II. Integrity III. Creativity

I, III
I, II, III
I, II
II, III

3. Which of the following warning symbol can be used for uranium substance?

A
B
C
D

4. A bottle has the following warning label attached to it as shown below. What could be the nature of the substance in the bottle?

Corrosive
Radioactive
Explosive
Irritant

5. Which of the following statement is correct after a hypothesis is supported by several investigations?

It becomes a theory of science
It becomes a concept of science
It becomes an inference of science
It becomes a low of science

6. The apparatus shown below is commonly found in the laboratory. What is the function of apparatus?

To contain chemicals when preparing gases which required heating
To content small amount of chemicals for heating
To collect gases released from chemical reactions
To prepare the chemical solution which is required for the chemical reaction

7. Which of the following statement is not correct about the use of a bunsen burner in the laboratory?

Used and luminous flame if strong heating of a substance is required
The size of the air hole controls the intensity of the flame
Let the air hole open fully when the bunsen burner is not in use
Close the air hole before igniting the burner

8. Which of the following is a common flammable substance in the laboratory?

Ammonia
Iodine water
Concentrated acid
Alcohol

9. Which of the following is not one of the steps in the scientific method?

Observation
Experiment
Doubtfulness
Communication

10. Which of the following steps should be carried out first before formulating a hypothesis?

Determine the variable
Gather relevant information
Share the observation with others
Design ann experiment