C7 | 물질의 특별한 성질 (Particular Nature of Matter)

Question 1

What is the particular model of a solid?

Hint: Forces, Vibration, Volume, Density, Compressed?

Answer 1

• Held together by very strong forces of attraction
• Unable to move about freely
• Vibrate about in their fixed positions
• Packed very closely together
• A fixed, regular pattern
• Has a definite shape and volume
• Occupies the smallest volume
• Has a higher density than liquids
  and gases
• Cannot be compressed

Question 2

What is the particular model of a liquid?

Hint: Forces, Inability/Ability, Vibration, Volume, Density, Compressed?

Answer 2

• Held together by strong forces of attraction
• Able to slide past one another
• Packed closely together
• No fixed, regular pattern
• Has no definite shape
• Has a fixed volume
• Occupies more volume than solids
• Has a lower density than solids
• Cannot be compressed

Question 3

What is the particular model of a gas?

Hint: Forces, Inability/Ability, Vibration, Volume, Density, Compressed?

Answer 3

• Held together by weak forces of attraction
• Able to move about freely over long distances
• Far apart from one another
• No fixed, regular pattern
• Has no definite shape or volume
• Occupies the largest volume
• Has the lowest density
• Can be compressed

Question 4

What occurs to matter during melting?

Hint: Energy, Vibrations

Answer 4

• When a solid is heated, the particles gain energy and vibrate more vigorously.
• When the particles gain enough energy, they overcome the strong forces of attraction between one another. The particles break free from one another and move randomly.

1번 문장이 가장 중요합니다. 2번 문장은 추가 정보일 뿐입니다.

Question 5

What occurs to matter during freezing?

Hint: Energy, Movement

Answer 5

When a liquid is cooled,
the particles lose
energy and move much
slower.

Question 6

What occurs to matter during boiling?

Hint: Energy, Vibrations

Answer 6

When a liquid is heated, the particles gain energy and vibrate more vigorously.

Question 7

What happens during condensation?

Hint: Energy, Movement

Answer 7

When a gas is cooled, the
particles lose energy and
move much slower.

Question 8

What is the Brownian Motion?

Answer 8

All particles of matter are constantly moving in a random manner and this is known as ‘Brownian motion’.