31.
Riddles
What is the process by which plants absorb water through their roots?
Osmosis.
What is the name of the outer layer of the Earth's surface?
crust
What is the process by which an organism takes in oxygen and releases carbon dioxide?
Respiration.
Thirty white horses on a red hill, First they champ, Then they stamp, Then they stand still.
Teeth.
What is the chemical formula for table salt?
The chemical formula for table salt is NaCl (sodium chloride).
I am a gas that is helpful to plants, but I cannot be bought at a gas station. What am I?
Carbon dioxide
I touch your face. I am in your words. I am a lack of space and beloved by birds. What am I?
Air
What is the chemical formula for sodium hydroxide?
The chemical formula for sodium hydroxide is NaOH.
What is the chemical formula for hydrochloric acid?
The chemical formula for hydrochloric acid is HCl.
What is the chemical symbol for silver?
The chemical symbol for silver is Ag.