Review Unit 2

What is the main reason why matter cannot be seen at a microscopic level?

• Matter is too large to be seen

• Matter is made up of particles that are too small to be seen

• Matter is invisible

• Matter is not real

In which state of matter are the particles that are very close together and vibrate?

• Solid

• Liquid

• Gas

• Plasma

In which state of matter are the particles that move freely and fill the entire volume of their container?

• Solid

• Liquid

• Gas

• Plasma

How does an increase in temperature affect the particles of a substance?

• Particles move more slowly

• Particles move more quickly

• Particles become larger

Which of the following options describes a homogeneous mixture?

• A mixture with different visible parts

• A mixture in which the components are evenly distributed

• A mixture that cannot be separated

• A mixture in which the components can be easily distinguished

What property would you use to determine if a substance is solid or liquid?

• Color

• Magnetism

• Shape

• Electrical conductivity

If a substance has a density lower than water, what will happen when it is placed in water?

• It will sink

• It will float

• It will dissolve

• It will evaporate

What tool would be most useful for measuring the temperature of a substance?

• Thermometer

• Magnet

• Graduated cylinder

• Magnifying glass

How can pictorial models help understand the behavior of particles in different states of matter?

• Provide precise measurements

• Show how particles move and interact in each state

• Separate different mixtures

• Determine the density of substances

Matter is defined as anything that has

• Phase changes and mass

• Atoms and density

• Color and weight

• Volume and mass