chapter 10

Question 1

what is expansion

Answer 1

when the size of an object increases its called expansion

Question 2

what is contraction

Answer 2

contraction is when the size of an object decreases

Question 3

definition of density

Answer 3

density of an object decreases when an object expands. the density of an object increases when an object contracts

Question 4

expansion in a solid

Answer 4

the particles of a solid can only vibrate in a fixed position and it cannot move around.

Question 5

expansion in a liquid

Answer 5

the particles in a liquid moves faster when they gain energy during heating, occupying more space. there would be an increase in volume.

Question 6

expansion in gas

Answer 6

the gas particles moves at a high speed constantly in all directions. The rate of expansion is at its highest in a gas.

Question 7

bimetallic strip

Answer 7

the strips would bend at different directions during heating and cooling. during cooling brass would contract faster than iron, affecting the volume of the brass which would be smaller than iron.