Ch.9 P.S Kinetic Theory of Matter

Front

Energy transferred during particle collision

Back

Kinetic energy

Answer explanation

When particles of matter collide, they transfer kinetic energy, which is the energy of motion. This transfer occurs as the particles interact, causing changes in their speed and direction.

Front

Boiling point of water

Back

212°F

Answer explanation

The boiling point of water is 212°F at standard atmospheric pressure. This is a well-known fact in science, making 212°F the correct answer among the choices provided.

Front

0°C in °F

Back

32°F

Answer explanation

To convert Celsius to Fahrenheit, use the formula °F = (°C × 9/5) + 32. For 0°C, it becomes (0 × 9/5) + 32 = 32°F. Thus, the correct answer is 32°F.

Front

50°F

Back

15°C

Answer explanation

To convert 50°F to Celsius, use the formula: C = (F - 32) × 5/9. Plugging in 50°F gives C = (50 - 32) × 5/9 = 10°C. Therefore, the closest answer is 15°C, which is the correct choice.

Front

-40°C in Fahrenheit

Back

-40°F

Answer explanation

To convert -40°C to Fahrenheit, use the formula F = (C × 9/5) + 32. Plugging in -40 gives F = (-40 × 9/5) + 32 = -40°F. Thus, the correct answer is -40°F.

Front

Four states of matter

Back

Solid, Liquid, Gas, Plasma

Answer explanation

The four fundamental states of matter are Solid, Liquid, Gas, and Plasma. Plasma is a state where gas is energized to the point that electrons are freed from atoms, making it distinct from vapor or ice, which are not fundamental states.

Front

State of matter represented by a cube

Back

Solid

Answer explanation

A cube is a three-dimensional shape with defined edges and vertices, which is characteristic of solids. Solids have a fixed shape and volume, unlike liquids, gases, or plasma, which do not maintain a definite shape.

Front

State of matter with highest energy

Back

Plasma

Answer explanation

Plasma requires the most energy because it consists of ionized gas with free electrons and ions, which need significant energy to overcome the attractive forces between them, unlike solids, liquids, and gases.

Front

Transition from gas to plasma

Back

Ionization

Answer explanation

The transition from gas to plasma occurs when gas particles gain enough energy to ionize, meaning they lose or gain electrons, resulting in charged particles. This process is called ionization.

Front

Definite volume of liquids

Back

Particles that cling to each other

Answer explanation

Liquids have a definite volume because their particles cling to each other due to strong intermolecular forces. This attraction keeps the particles close, allowing the liquid to maintain a fixed volume despite changes in shape.