D2. Exploring and Understanding Concepts
Specific Expectations
By the end of Grade 4, students will:
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Machines and Their Mechanisms
D2.1
identify machines that are used in daily life, and describe their purposes
D2.2
identify the parts of various mechanisms and describe the purpose of each part
D2.3
describe how different mechanisms transmit various types of motion, including rotary motion, from one system to another
D2.4
describe how mechanisms transform motion, including how they can change the geometric plane in which the motion occurs and the speed and/or direction of motion
D2.5
explain how forces are changed in a variety of machines