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Lesson Outline LESSON 4 Dwarf and Other Objects

A. Dwarf Planets 1. A dwarf is a sphere that a(n) . 2. A has objects similar in orbiting near it or crossing its orbital path. 3. The dwarf planets in the are , , , , and . a. Ceres is located in the belt. It is the dwarf planet in the solar system. b. has a rocky core surrounded by . It has known . c. is the largest dwarf planet. It is three times farther from the than the dwarf planet is. d. Makemake and Haumea are dwarf planets in the . B. 1. Asteroids the Sun in a band between and . Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.Companies, McGraw-Hill The divisionof a Glencoe/McGraw-Hill, © Copyright 2. The largest is called . 3. Asteroids are chunks of rock and . C. 1. Comets are made up of rocks, ice, and . a. between the particles in a holds it together. b. Comets the Sun in long elliptical orbits. 2. As a comet approaches the Sun, a bright can develop on the comet. a. The is the solid, inner part of a comet. b. As the comet approaches the Sun, it heats, changing some ice in the nucleus into a(n) . c. Energy from the Sun pushes gas and dust particles away from the nucleus and makes it .

66 The Solar System Name Date Class

Lesson Outline continued

3. comets take less than 200 years to orbit the Sun. They usually come from the . 4. comets take more than 200 years to orbit the Sun. They come from the . D. 1. A small, rocky particle that moves through space is a(n) . 2. As it passes through ’s , friction with the air makes a and the air around it . 3. A streak of light in the atmosphere made by a glowing meteoroid is a(n) . 4. Most meteoroids up in the atmosphere. a. A meteoroid that strikes the surface of a planet or a is called a(n) . b. A can form a bowl-shaped depression called a(n) in the surface it strikes. Copyright Copyright © Glencoe/McGraw-Hill, a of division The McGraw-Hill Companies, Inc.

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