Science 8 3rd Quarterly Assessment

What are the two conditions for a thing to be considered as matter?

• It occupies a space and has either a mass or a volume.
• It is visible and has a distinct shape.
• It has a color and a texture.
• It is transparent and can be measured

Which of the following is true about solids?

• They have indefinite shapes and volume.
• The particles can move freely around each other.
• They are incompressible.
• They take the shape of the container they are in.

What is the main difference between liquids and gases?

• The particles are in fixed positions in liquids.
• Liquids are incompressible while gases are compressible
• Gases have definite volume while liquids do not.
• Liquids have larger distances between particles than gases.

Which of the following is true about liquids?

• They have definite shape.
• The particles are far apart from each other.
• They can be poured and flow out of a container.
• The particles move at random directions very quickly.

Which of the following is true about gases?

• The particles are attracted to one another more strongly than the particles of liquids.
• They have definite volume.
• They are incompressible.
• They take the shape of the container they are in.

What is the main reason why gas particles can move freely around each other?

• The particles are attracted to one another.
• The particles are far apart from each other.
• The particles are in fixed positions
• The particles have definite shapes.

Which of the following is not a basic aspect of the particle nature of matter?

• Matter is made up of tiny particles.
• The particles of matter are moving all the time.
• These particles have spaces between them.
• The particles of matter do not attract each other.

Which of the following is true about the attraction between particles?

• It is negligible in gases.
• It is stronger in liquids than in gases.
• It holds the particles in fixed positions in solids.
• All of the above.

What is the process by which the molecules on the surface of a liquid break away and change into gas?

• condensation
• evaporation
• freezing
• melting

Which process is the reverse of evaporation?

• condensation
• freezing
• melting
• sublimation