INTRODUCTION TO SCIENTIFIC INVESTIGATION

Diagram 1 shows four apparatus, J, K, L and M.

Which of the following apparatus can be used to measure the volume of liquids?

• J and K.

• J and L.

• K and M.

• L and M.

What is the volume of this liquid?

• 23.5ml.

• 23.6 ml.

• 23.7 ml.

• 23.8 ml.

Diagram 3 shows a hazard symbol.

What is the meaning of this symbol?

• Poisonous.

• Irritant.

• Explosive

• Flammable

Table 1 shows the volumes of a few marbles measured using the water displacement method.

What is the volume of 5 marbles?

• 3 cm3

• 9 cm3.

• 15 cm.

• 21 cm3.

Diagram 5 shows several steps to measure the volume of a cork.

Which of the following is the correct sequence of steps to measure the volume of a cork?

• X, Y, Z

• Y, X, Z

• Y, Z, X

• Z, Y, X

Which of the following cause systematic errors?

• Zero error

• Parallax error

• Wrong technique

• Inaccurate measuring instrument

Diagram 7 shows a lead block with mass 2400 g.

What is the density in g/cm3 of this lead block?

• 20 g/cm3.

• 30 g/cm3.

• 60g/ cm3.

• 120 g/cm3.

Choose the correct formula for density.

• Density= Volume x Mass

• Density = Weight/ Volume

• Density = Mass/ Volume

• Density = Volume x Weight

Choose the LAST step in the scientific investigation.

• Making a conclusion

• Write a report

• Identify a problem

• Collecting data

What is the meaning of this hazard symbol?

• Poisonous

• Radioactive

• Flammable

• Explosive