Download 7 th Grade Science: Energy Unit Test Study Guide

7th Grade Science: Energy Unit Test Study Guide
1) Where is the most and least kinetic & potential energy on a hill or drop?
Least Potential Energy/Most Kinetic Energy – right before the object hits the ground
Most Potential Energy/Least Kinetic Energy – at the top of the highest hill/point
2) How/Where does potential energy change to kinetic energy?
As you are going down a hill or while an object is dropping. All the energy changes
back and forth from potential energy to kinetic energy and back to potential
energy.
3) What form of energy does a moving and nonmoving object have?
Moving: Kinetic Energy
Nonmoving: Potential Energy
4) What are the differences between the heat transfers of conduction, convection, and
radiation?
Conduction: At least two objects touching
Convection: Heat moving in currents
Radiation: Heat moving in the form of waves
5) How does mass and volume relate to the amount of thermal energy?
More mass or more volume = more thermal energy
Less mass or less volume = less thermal energy
6) As you go from a liquid to a solid, what happens to the energy of the molecules?
What type of energy does the molecules have?
Molecules lose energy, in the form of kinetic energy
7) What happens to molecules when you increase the temperature? What happens to
particles when you decrease the temperature?
If you increase the temperature, particles have more energy and move faster.
If you decrease the temperature, particles have less energy and move slower.
8) When referring to gases, what level of energy and speed do the molecules have?
Think about how gas particles move
Gas molecules have a higher energy and more speed when compared to solids and
liquids.
9) How does heat or thermal energy move or transfer?
Heat and thermal energy moves to the colder object. Hot  Cold
10) What is the connection between the mass or volume of a liquid and the liquid’s
temperature?
More mass or volume of a liquid, the more energy it requires to reach a higher
temperature.
11) Know the different forms of energy and how those can be transferred to different
types.

Mechanical Energy

Electrical Energy

Chemical Energy

Nuclear Energy

Thermal Energy

Electromagnetic (Light) Energy

Sound Energy

Potential Energy

Kinetic Energy