Grade 9 revision

What is the smallest particle that makes up every thing?

What is the color of the litmus paper when we add some drops of an acidic solution on it?

What is the process of changing state from solid to liquid?

What is the illustration of water?

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What is the positively charged particle in the atom?

What is the color of the litmus paper when we add some drops of an basic solution on it?

What is the process of changing state from gas to liquid?

What is the main component of air?

• oxygen
• carbon dioxide
• nitrogen gas
• methane

What type of bonding exists in sodium chloride molecules?

• covalent bonds
• metallic bonds
• ionic bonds

Covalent bonds are usually formed between …

• 2 metals
• 2 non metals
• 1 metal and 1 non metal