1. Give the meaning of the word density. 2. A block of silver has a mass of 20g and a volume of 2cm3. Calculate its density.

3. The mass of a particle of chromium is 52. The mass of a particle of Tungsten is 184. Predict which of the two metals has the higher density. Explain your prediction.

4. Describe how you will use the density bottle to determine the density of an object.

5. How do you determine the density of an irregular object

Which best explains why an iceberg floats?

Nebulae are enormous clouds in outer space. they are made mostly of hydrogen gas, helium gas, and dust. some nebulae glow brightly, while others do not. the stars that people see are huge, bright balls of glowing gas. they are made mostly of hydrogen and helium. which statement correctly describes other ways in which nebulae and stars are different? a. stars can form inside a nebula but a nebula can never be produced by any star. b. a star always has a higher density than a nebula. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star.

Measurements that have similar values are: a. usually accurate b. sometimes accurate c. always accurate d. never accurate