4. A white powder was tested and heated. After some time, it melts completely. What does it imply?
a. It is a mixture.
c. It is a homogeneous mixture.
b. It is a pure substance,
d. It is a combination of pure substance and mixture.
5. Which of the following could be Liquid A?
a. fruit juice
b. soft drinks
C. water
d. water-salt solution
6.Ethan wants to separate the marbles in a jar full of water. Which of the following is the BEST way to separate the mixture?
a decantation
b. dissolving
C. evaporation
d. using a magnet
7. Which of the following will Jeofrey do to segregate the rubber bands of different colors?
a decantation
b. evaporation
c. filtration
d. physical manipulation
8.What is the BEST way to use in separating iron fillings from a mixture?
a. filter paper
b. magnet
C. water
d.spoon
9.Which of the following uses evaporation as a means of separating the components of the given mixture?
b. pebbles and sand
a. oil and water
d. salt and water
c. sand and gravel
10. Which of the following materials will be used to separate a mixture of iron nails and sand?
b. filter paper
a. alcohol Lamp
c. magnet
d. spoon​