Gas & Thermal Expansion

Question 1

Temperature

Answer 1

The average kinetic energy of the atoms in a substance

Question 2

How do you increase a substance temp?

Answer 2

You increase the KE from surrounding area

Question 3

Thermal expansion

Answer 3

Objects are constrained, which means that it expands when heated and constricts when cooled

Question 4

Bimetallic strips

Answer 4

Have different %

Brass(more expansion) & iron(less expansion)

Question 5

Thermal expansion of liquids

Answer 5

Uniform change in volume, not change in each direction

Question 6

When water is above 4C,

Answer 6

Water expands when heated

Question 7

When water is below 4C

Answer 7

Water contracts when heated and expands when cooled

Question 8

Thermocline

Answer 8

Line separating warm and cold water

Question 9

Above 4C,

Answer 9

Warmer water on top

Question 10

Water blow 4C

Answer 10

Cooler water becomes less dense & floats to the top, warmer water moves down

Question 11

Turning over

Answer 11

When warmer displaces cooler water

Adds oxygen to the water at the bottom

Question 12

Water is only one of a few substances whose solid floats on its liquid

Question 13

Expansion of gasses

Answer 13

Volume expansion is greatest with gasses

Expansion is constant for any/all gasses

Question 14

If an object is constrained

Answer 14

There will be a buildup of pressure and forces

Question 15

What is thermal expansion caused by

Answer 15

Cause by the movement of atoms

Question 16

What three things determine thermal expansion

Answer 16

1) change in temp
2) original size
3) objects material