Across
- 2. A siphon doesn't work in space where there is no air or _____.
- 6. A steam engine converts thermal energy into _____ energy.
- 10. _____ was born in 1 AD according to our calendar
- 12. When using a plant for _____ it's important to use the correct part of the plant, because some parts might help, but other might not, or could even hurt.
- 13. A siphon doesn't work if it gets _____ into it.
- 14. Grapes have _____ (acid or base) in them.
- 15. According to Ptolemy, planets traveled slowly in their overall orbits but quickly in their _____.
Down
- 1. this natural philosopher added epicycles to the geocentric model to explain retrograde motion
- 3. Hero of Alexander used the Law of _____ to understand the image in a mirror is behind the mirror.
- 4. the Latin phrase AD stands for Anno _____
- 5. a device that moves liquids from one place to another
- 7. The reflection of a _____ mirror doesn't work the same way as a flat mirror.
- 8. the motion in which a planet initially moves one direction in the sky and then changes direction for a while before returning back to its original direction
- 9. We can use steam to produce _____ energy.
- 11. When an object is 5 centimeters in front of a flat its image will be 5 centimeters _____ the mirror.