Photosynthesis and Energy Transformation

Which best describes a process of photosynthesis? Photosynthesis is the process by which plants convert-

• radiant energy into chemical energy.

• heat energy into mechanical energy.

• heat energy and chemical energy.

• chemical energy into heat energy.

Glucose helps maintain life on our planet by storing-

• chemical energy.

• useable minerals.

• carbon dioxide.

• oxygen.

Which of the following correctly shows how energy flows through a food chain?

• Sun --> carnivores --> producers --> herbivores

• Sun --> producers --> herbivores --> carnivores

• Sun --> herbivores --> carnivores --> producers

• Sun --> producers --> carnivores --> herbivores

The conservation of energy states-

• that only humans create energy and then use it.

• that the only way to change energy is to destroy it.

• that energy cannot be created nor destroyed

• that energy can be destroyed and then recreated

Which of the following energy transformations occur when a lamp that is plugged into a wall socket is functioning correctly?

• Chemical energy to light energy

• Electrical energy to chemical energy

• Electrical energy to light energy

• Chemical energy to electrical energy

A television works by transforming electrical energy into what other kinds of energy?

• light, thermal, and sound

• thermal, chemical, and solar

• sound, mechanical, and electrical

• light, chemical and mechanical

Which type of change is reversible?

• chemical change

• temperature change

• physical change

Is the burning of wood a physical change or a chemical change?

• chemical change

• physical change

Is rust forming on a bicycle a physical change or a chemical change?

• chemical change

• physical change

______________ changes do not change the composition of the substance.

• Temperature

• Physical

• Location

• Chemical