MELO - SCI 6 Q1

What is matter?

• Anything that takes up space and has mass

• Only solids and liquids

• Only gases

• Only objects we can see

Which of the following is an example of an element?

• Water (H₂O)

• Oxygen (O₂)

• Salt (NaCl)

• Air

Which of the following is a compound?

• Oxygen (O₂)

• Water (H₂O)

• Gold (Au)

• Carbon dioxide (CO₂)

Which of the following is a mixture?

• Hydrogen (H₂)

• Salt (NaCl)

• Air

• Water (H₂O)

Which of these is an example of a homogeneous mixture?

• Salad

• Sand and water

• Salt dissolved in water

• Trail mix

What is a heterogeneous mixture?

• A mixture that has the same composition throughout

• A mixture where different substances can be seen

• A mixture that forms a uniform solution

• A type of compound

What is the appearance of a homogeneous mixture?

• The different substances are clearly visible

• It has a uniform composition

• It changes colors when mixed

• It forms layers

What is a common example of a heterogeneous mixture?

• Sugar in water

• Sand and gravel

• Air

• Vinegar

Which of the following is a technique used to separate a mixture of sand and water?

• Sieving

• Evaporation

• Decantation

• All of the above

Which of these is the process of separating a solid from a liquid by pouring off the liquid?

• Sieving

• Filtering

• Decantation

• Evaporation