Plants produce this for us to breathe
Oxygen
If you wake up, make your bed, and get dressed at the same time every day, you have this
Routine
If someone jumped out of the dark and yelled "Boo!", it might do this to you
Startle
A hippo would be called this
The antonym of comfortable is this
Awkward
Scientists do this to experiments
Conduct
Someone might need this to invent something new
Breakthrough
If you knocked over a can of paint, it would do this
Splatter
Taking a test you didn't study at all for might make you feel this
Perplexed
The antonym of modern is this
Plants use this for photosynthesis
Sunlight
If you can't decide whether to do one thing or another, you have this
Dilemma
When you can't wait, you do things in this way
Impatiently

This cave art from thousands of years ago is this
Prehistoric
The antonym of unwillingly is this
Eagerly
If a tree is cut down, the carbon dioxide stored in it will be this
Released
Labubus, Key-caps, and K-pop Demon Hunters have all been this
Craze
You do this when you are upset or don't want to be heard
Mutter
If your teacher started dancing in the middle of your midterm test, it would be this
The synonym of freed is this
Released
If you don't want something to happen, you try to do this
Prevent
When you really want to eat something, you have this
Appetite
A teacher would do this during break to make sure students are all behaving
Patrol
If you were very excited to go somewhere, you would go there in this way
Eagerly
The synonym of advancement is this
Breakthrough