b1 crossword

2. – What separating technique is used to separate an insoluble solid from a liquid?
3. – What technique would you use to get salt from salty water?
6. – What blood vessels carry blood back to the heart?
8. – What does the immune system produce to fight infections?
11. – What is the name of the lower chamber of the heart?
14. – In which part of the cell do most chemical reactions happen?
15. – Which part of the plant cell contains chlorophyll?
18. – What muscle helps you breathe by moving up and down under the lungs?
19. – What sugar is used in respiration to release energy?
21. – What organ pumps blood around the body?
22. – What structure controls what enters and leaves the cell?

1. – What technique separates liquids based on boiling points?
4. – Which gas is needed for aerobic respiration?
5. – What is given to protect people from certain diseases before they catch them?
7. – What type of pathogen causes diseases like the flu or COVID-19?
8. – What are the tiny air sacs in the lungs where gas exchange happens?
9. – What blood vessels carry blood away from the heart?
10. – What part of the cell controls its activities?
12. – What are the small pores on leaves that allow gas exchange?
13. – What are the smallest blood vessels called?
16. – What is the name of the upper chamber of the heart?
17. – What process allows plants to make their own food using sunlight?
20. – Which method is used to separate different dyes in ink?