Unit 4 Energy #2

While on vacation, Carine rides in a hot-air balloon. To make the balloon rise, thepilot turns on a flame to warm the air inside the balloon. How does the air change?

• The motion of the particles increases.
• The air particles move closer together.
• The air changes to a different state of matter.
• The emperature of the air decreases.

Deval drew the models below of particles in a substance. Which model bestrepresents the particles in a solid?

• Option A
• Option B
• Option C
• Option D

The amount of Kinetic Energy that an ice skater has on ice depends on what two factors?

• velocity and height
• velocity and how muscular their legs are 
• mass and height
• mass and velocity

Which phase of matter has a definite volume but no definite shape?

• liquid
• solid
• gas
• plasma

As Wilma holds a pan over a fire, the water begins to boil, as shown in the figurebelow.Which process is indicated by the letter X?

• convection
• conduction
• radiation
• insulation

What temperature scale should be used to label thermometer number 2?

• Celsius
• Kelvin
• Fahrenheit
• Absolute

Which of the following is the transfer of energy as heat by the movement of a liquid or gas?

• radiation
• conduction
• convection
• emission

Which of the following is a way in which elements and compounds are different?

• A compound contains many different kinds of elements, whereas an element contains manydifferent kinds of atoms
• Compounds can be broken down by physical changes, but elements cannot.
• Elements are pure substances, but compounds are not.
• Elements are made of identical atoms, whereas compounds are made of identical molecules.

Inside a room, the air is often warmer near the ceiling than near the floor. Which ofthe following accounts for this difference?

• insulation
• convection
• conduction
• radiation

Which type of energy involves harnessing heat produced within the Earth to generateelectricity?

• nuclear energy
• geothermal energy
• solar energy
• hydroelectric  energy