Particle Model of Matter
Explore the particle model of matter, including states of matter, particle arrangement, and energy.
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Particle Model of Matter
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Read each question carefully and provide your best answer. Diagrams may be helpful for some questions.
1. In which state of matter are particles arranged in a regular, fixed pattern and vibrate about fixed positions?
Solid
Liquid
Gas
Plasma
2. Which of the following statements best describes the movement of particles in a gas?
They vibrate about fixed positions.
They slide past each other.
They move randomly and rapidly.
They are stationary.
3. The image below illustrates the particle arrangement in different states of matter. Which diagram represents a liquid?
Solid
Liquid
Gas
All of the above
4. According to the particle model, all matter is made up of tiny, constantly particles.
5. When a substance melts, the particles gain enough energy to overcome some of the forces holding them in fixed positions, allowing them to past each other.
6. In a gas, the particles are very close together and have strong forces of attraction between them.
True
False
7. Increasing the temperature of a substance decreases the kinetic energy of its particles.
True
False
8. Describe the main differences in particle arrangement and movement between a solid and a liquid. (2 points)
9. Explain how the particle model helps us understand the process of evaporation. (2 points)
Match the term on the left with its definition on the right.
10. Sublimation
a. The process of a gas turning into a liquid.
11. Condensation
b. The process of a liquid turning into a gas.
12. Evaporation
c. The process of a solid turning directly into a gas.
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