Question 1

Rachelle bought a piece of land that has a length of 2 x10² meters and width of 7 x10²meters. What is the area of the land that Rachelle bought?

Accepted Answer

1.4 x10⁵m²

Answer

1. 4 x10⁴m²

Answer

1. 4 x10³m²

Answer

1. 4 x10²m²

Question 2

It is the process of associating numbers with physical quantities and phenomena.

Accepted Answer

Measurement

Answer

International Units of system

Answer

British System of Units

Answer

Accuracy and Precision

Question 3

Describe the position of the darts on the figure with regard to accuracy and precision.

Accepted Answer

Low accuracy, high precision

Answer

High accuracy, low precision

Answer

High accuracy, high precision

Answer

Low accuracy, low precision

Question 4

Evaluate: (4.5 x 10⁷)(2.8 x 10⁸)

Accepted Answer

1.26 x 10¹⁶

Answer

1.26x10¹⁵

Answer

12.6x10¹⁵

Answer

12.6x10¹⁶

Question 5

The volume of a liquid is 20.5ml. Which of the following sets of measurement the value with good accuracy?

Accepted Answer

20.2ml, 20.5 ml, 20.3 ml 20.1 ml

Answer

19.3ml, 19.2 ml, 18.6 ml, 18.7 ml

Answer

18.6ml, 17.6 ml, 19.6 ml, 17.2 ml

Answer

18.8ml, 19.0 ml, 19.2 ml, 18.8 ml

Question 6

How many significant digits in this number 27,210?

Accepted Answer

4

Answer

2

Answer

5

Answer

3

Question 7

Which group of measurements is most precise?

Accepted Answer

0.005 g, 0.0049 g, 0.0051 g

Answer

2.3x 10-2 kg, 2.31 x 102 kg, 2.29 x 1012 kg

Answer

1.23cm3, 2.21 cm3, 9.92 cm3

Answer

23.4 mm, 12.4 mm, 50.2 mm

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