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Eureka! chapter 2 lesson
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Description
Scientists and Engineers are Thinkers
Disciplinary Core Ideas
The faster a given object is moving, the more energy it possesses.
Energy is present whenever there are moving objects, sound, light, or heat. When objects collide, energy can be transferred from one object to another, thereby changing their motion. In such collisions, some energy is typically also transferred to the surrounding air; as a result, the air gets heated and sound is produced.
Possible solutions to a problem are limited by available materials and resources (constraints). The success of a designed solution is determined by considering the desired features of a solution (criteria). Different proposals for solutions can be compared on the basis of how well each one meets the specified criteria for success or how well each takes the constraints into account.
Waves, which are regular patterns of motion, can be made in water by disturbing the surface. When waves move across the surface of deep water, the water goes up and down in place; there is no net motion in the direction of the wave except when the water meets a beach.
Waves of the same type can differ in amplitude (height of the wave) and wavelength (spacing between wave peaks).
Research on a problem should be carried out before beginning to design a solution. Testing a solution involves investigating how well it performs under a range of likely conditions.
Plants and animals have both internal and external structures that serve various functions in growth, survival, behavior, and reproduction.
Energy can be moved from place to place by moving objects or through sound, light, or electric currents.
Light also transfers energy from place to place.
Energy can also be transferred from place to place by electric currents, which can then be used locally to produce motion, sound, heat, or light. The currents may have been produced to begin with by transforming the energy of motion into electrical energy.