Question

chapter 2: matter
read each question thoroughly. the teks coach boxes will help you apply the skills and concepts you need to answer the questions.
1 which activity could double the volume of an object while changing its mass only slightly?
a filling an empty bowl with soup
b inflating a balloon by blowing air into it
c pouring orange juice from a pitcher into a glass
d chopping a wood log into many small pieces
2 observe the ship. its engineers made sure that the ship floats instead of sinks. which statement best describes the property of the ship that the engineers specified?
a the mass of the ship must be less than the masses of objects that sink.
b the volume of the ship must be small in comparison to its mass.
c the density of the ship must be less than the density of the water.
d the speed of the ship must be fast enough to prevent it from sinking.

Explanation:

1. For the first question, inflating a balloon by blowing air into it increases its volume significantly while the mass of the added air is relatively small compared to the increase in volume. Filling a bowl with soup and pouring juice change mass more proportionally to volume change, and chopping wood doesn't double volume while slightly changing mass.
2. For the second question, according to Archimedes' principle, an object floats when its density is less than the density of the fluid it is in. So for a ship to float, its density must be less than that of water. Mass comparison to sinking - objects in option A is not the key property, and a small volume - to - mass ratio in option B would make it more likely to sink, and speed in option D is not related to the floating property.

Answer:

1. B. inflating a balloon by blowing air into it
2. C. The density of the ship must be less than the density of the water.