Grade 7 · Chemistry
This quiz helps revise “Oxygen” in Chemistry for grade 7. It has 25 questions in five categories: Atom and Molecule, In Nature, Properties and States, In the Lab, Fire and Compounds. Questions get harder as the points go up, from 100 to 500.
The 100- and 200-point questions are open here. The rest show only their first words, and there are no answers: all of that is in the game itself.
What symbol represents oxygen on the periodic table?
How many oxygen atoms make up a molecule of the gas we breathe?
What is oxygen's atomic…
In the gameWhat do we call…
In the gameWhat whole number is…
In the gameAbout what percentage of air by volume is oxygen?
What process lets green plants release oxygen using light?
Which organs shown on…
In the gameWhat process in cells…
In the gameWhich gas has three…
In the gameWhat state of matter is oxygen at room temperature?
What colour is oxygen at room temperature?
How does oxygen's density…
In the gameWhy do oxygen bubbles…
In the gameWhat colour is the…
In the game
Which glowing object shown here relights in a jar of oxygen?
Which liquid can break down into oxygen and water in a school experiment?
What is a substance…
In the gameWhat is the collection…
In the gameWhat industrial process separates…
In the game
What is the name for a reaction of fuel with oxygen that releases heat and light?
What is the reddish-brown coating on the iron nail shown here called?
Which gas forms when…
In the gameWhat white substance forms…
In the gameMagnesium and oxygen form…
In the gameAll 25 questions and the answers are in the game. Invite your class or friends with a link — guests need no account.