1. Chapter 2
Vocabulary Words

2. Day 1
Electromagnetic spectrum – arrangement of electromagnetic radiation – including radio waves, visible light from the Sun, gamma rays, Xrays, ultraviolet waves, infrared waves, and microwaves – according to their wavelengths. Observatory - a building used to house an optical telescope; often has a dome-shaped roof that can be opened for viewing Orbit – curved path of a satellite that results from a combination of the satellite’s forward movement and the gravitational pull of Earth. Project Apollo – final stage of the U.S. space program to reach the moon, with Apollo II landing on the moon’s surface on July 20, 1969.

3. Day 2
Project Gemini – early U.S. space program where one Gemini astronaut team connected with another spacecraft in orbit; also studied the effects of space travel on the human body
Project Mercury- first U.S. space program that orbited a piloted spacecraft around Earth and brought it back safely.
Radio telescope – an instrument tat collects and records radio waves traveling through space and can be sued day or night under most weather conditions; provides information to map the universe and look for life on other planets.
Reflecting telescope – an optical magnifying instrument that uses a concave mirror in the base of the telescope to focus light from an object and form an image at the focal point.

4. Day 3
Refracting telescope – an optical magnifying instrument in which light from an object passes through a double convex lens and is bent to form an image at the focal point
Rocket – a motor that does not require air to burn fuel and can carry objects into space
Satellite – any object that revolves around another object in space

5. Day 4
Space probe – an instrument that carries data-gathering equipment deep into space and sends information back to Earth.
Space shuttle – a reusable spacecraft designed to make may trips and that carries astronauts, satellites, and other cargo to and from space
Space station – a large structure with living quarters, work and exercise areas, and equipment and support systems for humans to live and work in space; can provide the opportunity to conduct research not possible on Earth.