Displaying questions 11 - 20 of 53
11.
The main gas present in the air we breathe is?
12.
What is the chemical symbol for gold?
13.
The human skeleton is made up of how many bones?
14.
The largest organ in the human body is?
15.
Which planet is closest to the sun?
16.
The hardest natural substance on Earth is?
17.
The study of living organisms is called?
18.
Which gas is most abundant in Earth's atmosphere?
19.
The unit of electric current is?
20.
The chemical formula for table salt is?