Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
13 Cards in this Set
- Front
- Back
- 3rd side (hint)
|
Energy cannot be...
|
...created or destroyed
|
c...... or d.......
|
|
|
What do objects do when they vibrate?
|
They produce sound and sound waves.
|
s.... w..../s.....
|
|
|
What are the basic forms of energy?
|
Heat, Light, Sound, Kinetic, Grav pot., Electrical, Magnetic, Nuclear, Chemical & Elastic pot.
|
10
|
|
|
When do energy changes happen?
|
When anything happens.
|
|
|
|
Energy is measured in...
|
...Joules and Kilojouls.
|
J.....
|
|
|
What does grav. pot. energy depend on?
|
It depends on the height and mass of an object.
|
Gravity
|
|
|
What is the unit to measure frequency?
|
Hertz.
|
Hz
|
|
|
Sounds with a high frequency sound...
|
...high pitched to us.
|
High p......
|
|
|
To increase the pitch/frequency you can...
|
...1. Shorten the string or columb of air that is vibrating.
2. Tighten the string. 3. Use a thinner string. 4. Use a different material. |
size, thickness, material
|
|
|
What can solids travel through?
|
They can travel through solids, liquids and gases but not a vacuum.
|
3 things
|
|
|
What is the Earth's main source of energy?
|
The sun.
|
yellow
|
|
|
What are the main energy sources?
|
Oil, Gas, Coal, Nuclear, Solar, Wind, Wave, Tidal, Hydro-electric, Geothermal, Biomass.
|
11
|
|
|
Fossil Fuels are formed when...
|
...animals and plant remains decompose slowly over millions of years.
|
plants, animals
|
