Chapter 1: The Scientific Endeavour

Question 1

Name some common instruments used to make measurements?

Answer 1

Measuring cylinder, Electronic balance, Digital calipers, Digital stopwatch, Thermometer
*learn how to read and draw the instruments

Question 2

The readings taken from the measurements are expressed as?

Answer 2

They are expressed as numerical value with an an unit.

For example, the time shown on the stopwatch.
Numerical value unit representing a
representing the standard of
quantity measured measurement

Question 3

What is the standardised units called?

Answer 3

International System of Units or SI units

Question 4

What is the SI unit used for?

Answer 4

It is used to ensure a common standard when making measurements.

Question 5

What is the SI unit for volume?

Answer 5

m3 ( meter cube) *learn how to convert

Question 6

What is the SI unit for mass?

Answer 6

kg ( kilogram) *learn how to convert

Question 7

What is the SI unit for time?

Answer 7

s (seconds) *learn how to convert

Question 8

What is the SI unit for length?

Answer 8

m (meters) *learn how to convert

Question 9

What is the SI unit for temperature?

Answer 9

K (kelvin) *learn how to convert

Question 10

What is it called when the weight on the weighing scale is not zero before starting the experiment?

Answer 10

zero error

Question 11

What does zero error mean?

Answer 11

Zero error is a type of error in which an instrument gives a non-zero reading when the measured quantity should be zero.

Question 12

What function on an instrument can reset the zero error?

Answer 12

The ‘tare’ button.

Question 13

How do you read the measurement on a ruler?

Answer 13

Position the eye so that the line of sight is perpendicular to the marking on the ruler.

Question 14

How do you read the measurement on a measuring cylinder?

Answer 14

Position the eye so that the line of sight is level with the bottom of the meniscus. (The curved surface of the liquid)

Question 15

How do you read the measurement on a spring balance?

Answer 15

Position the eye so that the line of sight is perpendicular to the marking on the scale.

Question 16

How do you read the measurement on a thermometer?

Answer 16

Position the eye so that the line of sight is level with the top of the meniscus.

Question 17

List all 10 lab safety.

Answer 17

1. No eating or drinking
2. Tie up hair
3. Clothes must not post any danger in the lab
4. Goggles must be work if there is any risk of danger
5. Wash your hands before leaving the lab.
6. Be careful and do not play around.
7. Report damage equipment

Question 18

list the first four hazard symbols an what they are for.

Answer 18

1.Corrosives-cause severe damage on contact with body
2.Harmful/Irritant-irritation, allergic reaction or inflammation of skin. May cause drowsiness and dizziness. Can cause harm to the ozone layer.
3.Environmental Toxicity-cause harmful effects on the environment
4.