1. Energize Science Grade 5 Module D Chapter 1 Vocabulary

2. What is energy & work? Energy is the ability to do work or change matter Examples: Sunlight heats air and causes wind to blow Sunlight changes matter-ice melting to water

3. What is power? The rate at which work is done For Rocky, the rate at which the work is done means how long it takes to go up the rock. Rocky the rock climber

4. What is potential energy? Stored energy “potential” means possible

5. What is kinetic energy? Energy of motion Kinetic means “having to do with motion”

6. What is a chemical bond? Is the strong attraction that holds two atoms together in a substance Example: chemical bonds hold hydrogen and oxygen atoms together in a water molecule H2OH2O

7. What is a molecule? Is the smallest bit of a compound that has the same properties of that compound For example in the compound water, a molecule is the smallest bit of water that has the properties of the water.

8. What is conservation of mass and energy? Mass & energy are neither created nor destroyed during chemical reactions They just change forms Example: rusty nail Atoms of iron have combined with oxygen making a new substance The energy has changed into heat and radiated away

9. What is a joule? Scientists use the same unit of measurement for energy and work-the joule One joule is a very small amount of energy or work You use about 9 joules of energy to lift the average textbook one meter above your desk

10. What is a watt? Metric unit that measures power This unit of power can be found on light bulbs

11. What is electrical energy? Kind of energy carried by moving charges Example: light bulb Electrical energy to light energy and thermal energy

12. What is horsepower? Customary unit that measures power One horsepower = 746 watts In the 1800’s, James Watt used a horse to estimate power. This led to the unit horsepower Today scientists measure power in watts Watt found that his horse could lift or pull a 550lb. weight a distance 1 foot in 1 second. So, he called this unit of power 1 horsepower.

13. What is mechanical energy? Energy an object has because of its motion and forces acting on it Example: fan Electrical energy to mechanical energy

14. What is chemical energy? Energy stored in the chemical bonds between atoms and molecules Example: radio Chemical energy to sound energy