Sciences

Colegio Bilingüe Los Angeles Science Study Cuide f or Exam Second Grade Ñame: £¿W £¿\W\ *Teacher Flor

Topic 1: the earth, sun and moon 1. The earth is called theblue planet 2. The atmosphere is the layer of air that surrounds the earth 3. The earth spins afound and it takes 24 hours. 4. The sun is a big hot star. 3. The sundetermines day and night 6. Parts of the day are: night, sunrise, noon, and sunset. 7. The moon is satellite of earth. 8. There is no water on the moon. 9. The moonhas 4 phases. 10. Yuri Gagarin was the first cosmonaut ¡n space. Topic 2: the 4 seasons of the year. 1. A year has 12 months. 2. The 12 months are divided into 4seasons: spring, summer, autumn and winter. 3. Spring: march 21 - june 20. It's warm. There are a lot of f lowers. 4. Summer: june 21 - September 21. It's hot and dry. 5.Autumn: September 22 - December 20. It's rainy and trees lose their leaves. 6. Winter: December 21 - march 20. It's cold and snowy. Animáis hibernate. Topic 3: rocksand soil 1. There are 3 different kinds of rocks: igneous, rnetamorphic and sedimentary. 2. Soil is a layer of earth mixed with water, air and plant remains. 3. Thereare 3 types.of soil: fertile, poor and arid. 4. Erosión is the most serious problem for soil. 5. Geosphere is the solid part of earth. 6. Soil is made up of 3 layers:top, middle, and bottom. Topic 4: water and air. 1. 70% of earth is water. 2. The states of matter are: liquid, solid and gas. 3. People use water for: drinking,cooking, washing and bathing. 4. Water cycle is the rnovemenfof water around the earth.

5- Air is a mixture of gases. 6. Oxygen is the most ímportant gas in air.