unit 3 Simple Machines SEDL（第三单元SEDL简单的机器）.pdf

u n i t 3 Simple Machines Prior Knowledge The student has 1. found products of two single-digit factors using arrays 2. found a linear measure using inches and feet 3. added and subtracted three-digit numbers with renaming 4. found items in an encyclopedia 5. put words in alphabetical order 6. sequenced numbers through 1000 7. constructed graphs 8. identified geometric shapes 9. identified written text as a poem. Mathematics, Science and Language Objectives Mathematics The student will 1. calculate weight of an object in space 2. compute averages 3. record data 4. explore measurements of sides of a right triangle 5. use even and odd numbers to estimate 6. multiply and divide using two-digit numbers and three- or four-digit products 7. calculate the perimeter and, without using pi, the circumference of a circle. Science The student will 1. list and give examples of simple machines 2. give an example of a force, such as inertia, friction or gravity, overcome in work 3. construct at least one simple machine 4. predict the amount of force needed to move a resistance 5. name at least five inventors 6. associate at least three events of historical importance with the invention of three important machines. Language The student will 1. use related vocabulary to explain and describe the function of simple machines 2. use related books to illustrate, write, label and graph new concepts 3. write a