| The range of all possible frequencies of electromagnetic radiation, including radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays. | Electromagnetic Spectrum |
| What is the electromagnetic spectrum? | The electromagnetic spectrum is the range of all possible frequencies of electromagnetic radiation. |
| The part of the electromagnetic spectrum that is visible to the human eye, ranging from violet to red. | Visible Light |
| What part of the electromagnetic spectrum can humans see? | Humans can only see visible light. |
| A restricted span or scope within a larger continuum. | Limited Range |
| How would you describe the range of frequencies of electromagnetic radiation that humans can detect? | The range of frequencies that humans can detect is limited to visible light. |
| Waves that consist of oscillating electric and magnetic fields and vary in properties based on their wavelength. | Electromagnetic Waves |
| What are electromagnetic waves? | Waves consisting of oscillating electric and magnetic fields that vary in properties based on their wavelength. |
| The process by which electromagnetic waves transfer their energy to the material they encounter, causing the material to heat up. | Absorption |
| What is absorption? | The process by which electromagnetic waves transfer their energy to the material they encounter, causing the material to heat up. |
| The process by which electromagnetic waves pass through a material without being absorbed or reflected. | Transmission |
| What is transmission? | The process by which electromagnetic waves pass through a material without being absorbed or reflected. |
| The process by which electromagnetic waves bounce off the surface of a material and change direction. | Reflection |
| What is reflection? | The process by which electromagnetic waves bounce off the surface of a material and change direction. |
| The bending of electromagnetic waves as they pass from one material to another due to changes in wave speed. | Refraction |
| What is refraction? | The bending of electromagnetic waves as they pass from one material to another due to changes in wave speed. |
| Electromagnetic waves with wavelengths between approximately 400 and 700 nanometers, which are visible to the human eye. | Visible Light |
| How does glass interact with visible light? | Glass transmits visible light but doesn't transmit ultraviolet. |
| Electromagnetic waves with wavelengths between approximately 1 millimeter and 1 meter, commonly used in microwave ovens for cooking. | Microwaves |
| How do microwaves interact with different materials? | Microwaves are absorbed by foods but reflected by metals. |
| Waves that consist of synchronized oscillations of electric and magnetic fields and include radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays. | Electromagnetic Waves |
| What are electromagnetic waves? | Waves consisting of synchronized oscillations of electric and magnetic fields, including radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays. |
| The speed of an object in a particular direction. | Velocity |
| What is velocity? | The speed of an object in a given direction. |
| A space entirely devoid of matter, including air and other gases. | Vacuum |
| At what velocity do electromagnetic waves travel in a vacuum? | 300,000,000 m/s (the speed of light). |
| The bending of light or other electromagnetic waves as they pass from one medium into another of different density. | Refraction |
| What is refraction? | The bending of light or electromagnetic waves as they pass from one medium into another of different density. |
| Materials with a higher density, containing more mass per unit volume. | Denser Materials |
| In which types of materials do electromagnetic waves travel at slower velocities? | Denser materials. |
| Electromagnetic waves with wavelengths longer than infrared light, used for long-distance communication. | Radio Waves |
| How can some radio waves be refracted when they enter the Earth's upper atmosphere? | The change in density of the atmosphere causes the radio waves to bend, allowing them to curve back down towards the ground, increasing the range or radio signals. |
