Kinetic Energy

Front

Matter Noun

---

[mat-er]

Back

Matter

---

Anything that is made of particles, has mass, and occupies space, existing in states like solid, liquid, or gas.

---

Example: The image shows how particles are arranged in solids, liquids, and gases, explaining the states of matter.

Front

Particles Noun

---

[par-ti-kuls]

Back

Particles

---

The extremely small units, such as atoms or molecules, that all matter is composed of and are constantly in motion.

---

Example: The image shows an atom's structure with electrons, protons, and neutrons, illustrating particles in motion.

Front

Model Noun

---

[mod-l]

Back

Model

---

A representation used to help understand complex ideas or things that cannot be seen directly, like the arrangement of particles.

---

Example: A model of the solar system shows how planets orbit the sun, helping to understand their arrangement.

Front

Gas Noun

---

[gas]

Back

Gas

---

A state of matter in which particles are not bonded and move freely and rapidly to fill any available space.

---

Example: The image shows different gases like air and helium, illustrating how gases have no fixed shape and fill available space.

Front

Mass Noun

---

[mas]

Back

Mass

---

The measure of the amount of matter, or the number of particles, contained within a physical body or substance.

---

Example: A balance scale showing a feather and a rock demonstrates how mass is the amount of matter in an object.

Front

Mixture Noun

---

[mix-cher]

Back

Mixture

---

A substance made of two or more different components, like the gases in air, that are not chemically bonded together.

---

Example: Colored spheres in separate beakers combine to form a mixture, showing components not chemically bonded.

Front

Density Noun

---

[den-si-tee]

Back

Density

---

The measure of how many particles are packed into a certain amount of space, calculated as mass per unit volume.

---

Example: Objects with different densities float or sink in water, showing how density affects buoyancy.

Front

Kinetic Energy Noun

---

[ki-net-ik en-er-jee]

Back

Kinetic Energy

---

The energy that an object or particle possesses due to its motion, which increases with its speed and mass.

---

Example: A cyclist speeds down a hill, gaining kinetic energy from motion.

Front

Speed Noun

---

[speed]

Back

Speed

---

The rate at which an object or particle is moving, which directly affects the amount of its kinetic energy.

---

Example: A spring releases a ball, showing how speed increases as kinetic energy is transferred.

Front

Expansion Noun

---

[ek-span-shun]

Back

Expansion

---

The increase in the volume of matter that occurs when its particles are heated, gain kinetic energy, and move farther apart.

---

Example: Particles move farther apart when heated, showing expansion.