Across
- 4. This is Earth's natural satellite.
- 5. This is an organ of the digestive system. Food usually stays here for approximately four hours.
- 7. Around a billion people live without access to clean water around the world. This scenario is called the water ________.
- 10. If a being is formed by many cells, it is a _______ being.
- 11. This is a far away planet. It is an ice giant. It's cold and blue.
- 13. These are rocks made of metal and mineral that orbit in space.
- 14. This is the part of the water cycle in which water goes from the atmosphere to earth in the form of rain, sleet or snow.
- 16. During gas exchange, carbon dioxide goes out of the boy and ______ goes in.
Down
- 1. These are the main organs of the respiratory system. Humans have two of them.
- 2. This is the process that happens when water is released by plants.
- 3. They are one of the celestial bodies present in our solar system. They are made of ice, and when they burn they also form a kind of tail.
- 6. The ________ system is responsible for moving the blood around our body.
- 8. All living beings are made up of _____. Some have many and others have just one.
- 9. This is the process that happens when the sun heats the water and it changes from liquid to gas.
- 12. Food is very important for our bodies because it gives us ________ to do our daily activities.
- 15. This is the liquid that fills up the cell.