CORE VOCABULARY—Remind students that an axle is part of a simple machine called a wheel and axle and is a rod that is longer than it is wide and is connected to a wheel so that they turn together. Simple Sentence A simple sentence only has one independent clause. An independent clause has a subject and a verb and expresses a complete thought. In this lesson, students are constructing a compound machine they feel would be beneficial to use aboard the International Space Station. First, they learn about the six simple machines, their purposes, … Six Simple Machines Six simple machines may have no moving parts, or very few. Simple machines include: Wheel-and-axles: A wheel can turn freely when it is attached to an axle. This invention made … Simple Machines By Sandie Lee e machines every day. They help us lift, pull, transport, and old objects together. Without these very basic machines our lives rhaps even dangerous. But if you were to place … Name: Calculate the Simple Interest for the Word Problems: How much interest does a $318 investment earn at 9% over one year? If you borrow $675 for six years at an interest rate of 10%, how much … Simple Interest Worksheet Directions: Calculate the following simple interest problems. Write your answers in the space provided; show your work. Use the formula I = P x R x T and round your answers ….