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EGYPTIAN AMERICAN INTERNATIONAL SCHOOL Elementary Science Department SEMESTER 1 GRADE 6 Name: Date: Class: Homework sheet 12.3 VOCABULARY REVIEW Match each term in column B with its meaning in column A. Column A ______1. Huge balls of very hot, glowing gases in space that produce Column B A. astronomy their own light and heat. ______2. The study of objects in space and their properties. B. galaxy ______3. A group of billions of stars, objects that orbit those stars, gas, C. stars and dust. ______4. Everything that exists, including galaxies and everything in D. universe them. SCIENCE CONCEPTS Fill in the letter of choice that best answers the question 1. There are several types of galaxies. How do scientists classify galaxies? by size by shape by temperature by number of stars 2. There are many different colors of stars. Which characteristic determines the color of a star? temperature size and shape actual brightness distance from Earth Page 1 of 2 3. A galaxy is composed of billions of stars held together by gravity. The illustration below shows one common type of galaxy. What type of galaxy is shown in the illustration? barred spiral elliptical spinning spiral 4. The diagram below shows the Milky Way galaxy. Which letter best shows the location of our solar system? W X Y Z 5. The sun is a medium-sized star, but it appears much larger than other stars. Why does the sun appear to be so large? The sun is hotter than other stars. The sun produces more light than other stars. The sun is much closer to Earth than other stars are. The sun is affected by Earth’s gravity more than other stars are. Page 2 of 2