, of each object shown in the following diagrams: b.
100 90 80 70 60 50 40 30 20 10
100 90 80 70 60 50 40 30 20 10
: Fig. 25.20
100 90 80 70 60 50 40 30 20 10
TEST TUBE 8. Why do we always read the bottom of the meniscus when measuring the volume of water? Measuring mass
Mass is the amount of matter in an object. The standard unit of mass is the kilogram (kg). When the mass being measured is smaller, grams (g) are used (1 kg = 1000 g).
Instruments used to measure mass are a mass balance and a spring balance.
: Fig. 25.21 A mass balance FIGURE IT OUT!
1. Convert the following masses into kilograms (kg): a. 300 g
b. 25 g
2. Convert the following masses into grams (g): a. 2.5 kg
b. 150 kg : Fig. 25.22 A spring balance ? TEST TUBE
9. Indicate how you would measure the mass of the following: a. 100 steel ball bearings that do not fit on the top of a mass balance b. a feather that does not register a mass on a mass balance