Across
- 2. they orbit the sun and they are made of dust and ice
- 3. light emitting diodes
- 7. we can get electric energy from it
- 8. we use it to prevent the flow of charge
- 10. the fourth planets in our solar system
Down
- 1. electrons flow easily through it
- 4. how many planets are made of gas in our solar system
- 5. all of them are both emit light
- 6. the third planets in our solar system
- 9. we need it to control the circuit on and off