1. Precise measurements are all about the same. 2. In the number 6.300 the zeros aren’t significant.
3. To change a material from liquid to gas we need to increase its temperature.
4. Melting is the phase change from liquid to gas.
5. Water, without salt in it, is accurately described as pure.
6. Pure elements contain atoms of different atomic numbers.
7. 1 gram is equal to 1000 milligrams.
8. 1 gram of water has a volume of 1 cm3 meaning water has a density of 1 g/cm3.
9. Solutions can be filtered to separate the parts present.
10. The combination of materials with different properties is a mixture.