b. element and compound d. substance and mixture a air c. stainless steel c. mixture separated 1. What are the two (2) classes of matter? a. atom and molecule c. plant and animal cells 2. Which is true regarding water? a compound of element c. mixture of gases b. element of gases d. substances of gases 3. Which of the following is a physical appearance of a substance? a complicated d. non-uniform b. heterogeneous c. homogeneous 4. Which of the following is a heterogeneous mixture? d. soft drink b. oil in water 5. What substance is made by mixing two elements without being chemically combined? d solution a compound b. element 6. What is the difference between a substance and a mixture? a substance can be separated while mixture cannot be b. substance has many components while mixture has one only C. substance is heterogeneous while mixture is homogeneous d. substance is pure while mixture is impure 7. Which one is the best way to determine whether an unknown sample is a substance or a mixture? a knowing its density c. tasting the given sample b. observing its physical appearance d. testing its melting and boiling point 8. What does it indicate when a sugar is heated in a test tube until it is completely changed into a black mass and droplets of water? a compound b. element c. mixture d. solution 9. Which of the following statements distinguishes pure substances from mixtures? a can be separated by physical b. consists of two or more kinds of matter c. have constant boiling temperature and melting temperature d. have no specific solubility and densities 10. To separate salt from water in a seawater mixture, what process is used? a condensation b. distillation c. evaporation d. filtration 11. What is the best way to use in separating iron parts from a mixture? a filter paper b. magnet c. spoon d. water





need ko na po talaga eh salamat po​