NAWL 1.20 Set 31
Words 601 to 620

 1  the scientific study of genes, how a living things develop between generations

 3  a problem that requires thought and skill to be solved

 5  not famous, unknown by most people; not easy to understand

 7  a position or opinion that is stated to the public

11 a long, narrow piece of metal or wood, that is used to hold or support something

12 the act or process of removing or being removed

14 a door that you go through to leave a place

15 concerning atoms

16 a very small part of an atom that has a positive electrical charge

17 to do with breathing

 1  the force that makes things fall down towards the ground

 2  to disagree, to say the opposite is true

 3  showing a lot of deep knowledge or thought

 6  actions that are illegal or morally questionable, often performed by a person in a position of power

 7  to make something stable or consistent, with no major changes

 8  by which; by that thing

 9  a person from your family that lived in the past

10 a salt or compound used to help grown plants

13 unimportant