2425_Sci6_ST_Review

Which of the following is an example of a compound?

• gold
• iron
• oxygen
• water

What makes a mixture homogeneous?

• it separates into layers
• it has visible different parts
• it has uniform composition throughout
• it contains only one type of substance

If you need to create a salt solution for a science experiment, what role does salt play in the solution?

• precipitate
• solute
• solvent
• supernate

Which of the following is NOT an example of a homogeneous mixture?

• air
• salad
• saltwater
• vinegar

What is the difference between a homogeneous mixture and a heterogeneous mixture?

• heterogeneous: solids:: homogeneous: liquids
• homogeneous: separated by a magnet:: heterogeneous: cannot be separated by a magnet
• homogeneous: visible different parts:: heterogeneous: uniform
• heterogeneous: visible different parts:: homogeneous: uniform

What is a precipitate in a suspension?

• the solution after filtration
• the liquid part of the mixture
• the particles that remain suspended
• the particles that settles at the bottom

If you mix sand and water, what is the supernate?

• sand
• water
• sand and water
• neither sand nor water

How is foam different from gel?

• foal and gel are the same
• foam is a solid with gas bubbles, while gel is a liquid with solid properties
• foam is a liquid with gas bubbles, while gel is a solid with liquid properties
• foam is a liquid with tiny solid particles, while gel is a solid with liquid properties

If you want to create a foam, which of the following would you use?

• gel
• liquid with gas
• solid with liquid
• homogeneous mixture

Which method is used to separate sand from water?

• sieving
• filtration
• decantation
• evaporation