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Stack #4706469
| Question | Answer |
|---|---|
| How can you tell that energy is present in a system? | When you observe a change occurring |
| An example of observable changes | An object moving An object heating up A light turning on |
| Can a nonmoving object have energy | Yes, a non-moving object can have stored potential energy |
| Identify what chain shows that energy is present A moving bicycle | Wheels turning? |
| What chain shows energy is present in a glowing lightbulb | The light is on |
| Identify what change shows that energy is present in a stretch rubber band | Changing from normal shape to stretched |
| Identify what chain shows energy is present in a hot pan | It may give off steam foods boiling |
| What two factors affect the kinetic energy of a moving object | Mass and speed |
| Two objects move at the same speed, but one has more mass which object should have more kinetic energy | The object with more mass |
| Two objects have the same mass, but one moves faster, which object should have more kinetic energy | The object moving faster |
| Gravitational potential energy increases | Mass increases and height increases |
| Explain how stretching or compressing an object can store elastic potential energy | The object is forced away from its normal shape |
| How can food or fuel store chemical potential energy? | Chemical bonds energy is released during chemical reaction reactions |
| What must happen for work to transfer energy to an object? | A force must cause the object to move through a distance in the direction of the force |
| A person holds a heavy box still for 30 seconds is mechanical work being done on the box | No Because no displacement occurs |
| What unit is used for energy? | Joules |
| List the energy forms emphasized in this chapter | Kinetic Potential Gravitational potential Elastic potential Chemical potential Mechanical Sound Thermal Elastic Radiant Nuclear |
| What is the difference between thermal and radiant energy? | Energy associated with the motion of particles in matter is thermal Energy carried by electromagnetic waves, and can travel through empty space is radiant |
| The sun gives off radiant and the thermal energy what energy source inside the sun is connected to those outputs | Nuclear energy |
| Choose three everyday objects and identify the main energy form in each | Moving car is kinetic Lightbulb is ready Hot stove is the thermal |
| What is energy transformation? | When energy changes from one to another |
| What is the microwave energy chain? | Electrical energy ——- radiant/microwave energy ——thermal energy in the food |
| How can one device have more than one energy output | because energy can be transformed into multiple forms of the same time |
| Explain why energy transformation does not create new energy | The same amount of energy is simply transferred or changed into different forms |
Created by:
ahulette