Khoa học Tiếng Anh 2

What is water made of? 

• Water is made of carbon and nitrogen.
• Water is made of sodium and chlorine.
• Water is made of helium and neon.
• Water is made of hydrogen and oxygen.

What state of matter is air? 

• Gas
• Plasma
• Liquid
• Solid

Which of these is an example of a solid? 

• Ice
• Steam
• Oxygen
• Water

What do we call the change from a liquid to a gas

• Condensation
• Melting

• Freezing
• Evaporation

What is the main gas we breathe out? 

• Carbon dioxide
• Hydrogen
• Nitrogen
• Oxygen

What happens when you mix vinegar and baking soda? 

• Nothing

• It bubbles and fizzes           

• It explodes               

• It changes color 

Which of these is a metal? 

• Carbon
• Oxygen
• Iron
• Water

What is the pH of pure water? 

• 8
• 7
• 5
• 6

What is the smallest unit of matter? 

• Proton

• Molecule

• Atom
• cell

What do we call a substance that cannot be broken down into simpler substances? 

• Element
• Solution
• Mixture
• Compound