QUARTER 3 SCIENCE 8

Which of the properties is present in gas but not in liquid and solid?

• Strong intermolecular force of attraction

• High compressibility

• Exert pressure

• High density

Why are gases compressible? It is because gas particles are ______________.

• closer to one another, pushing one another as they move

• far apart and there is negligible attraction between them

• closely packed together in fixed position

• held together by strong forces

The volume of liquids and solids are _________ while of gases are _________.

• indefinite, definite

• indefinite, indefinite

• definite, definite

• definite, indefinite

Which involves a physical change?

• Lighting of matchstick

• Cutting of woods

• Ripening of fruits

• Rusting of iron

The temperature at which matter changes from a solid to a liquid is called the _____ point.

• Melting

• Freezing

• Condensing

• Boiling

What causes water droplets to form on the outside surface of a glass with cold water?

• Water droplets formed on the walls of the glass is a result of chemical change.

• Water molecules from outside passes through the pores of the glass.

• Water vapor molecules in air condense on the glass wall.

• Water vapor molecules in air evaporates on the glass wall.

If heat is taken away from a gaseous substance, what phase change will occur?

• Vaporization

• Melting

• Condensation

• Boiling

When you place a pot of water on the stove and heat the water up, you notice that bubbles form throughout. What phase change is the water undergoing?

• Sublimation

• Evaporation

• Condensation

• Boiling

Which phase change in matter involves an absorption of heat?

• freezing

• deposition

• evaporation

• condensation

Which is in the correct order of Water Cycle?

• Precipitation, Run-off, Evaporation, Condensation

• Evaporation, Condensation, Precipitation, Run-off

• Condensation, Evaporation, Precipitation, Run-off

• Evaporation, Precipitation, Run-off, Condensation