SCIENCE 9 4th Quarter-2

Which among the forms of energy is considered a potential energy?

• chemical energy

• radiant energy

• sound energy

• thermal energy

Which of the following happens to a coconut that falls freely?

• loses potential energy and gains kinetic energy

• loses both potential and kinetic energy

• gains potential energy and loses kinetic energy

• gains both potential energy and kinetic energy

What is the unit of potenial and kinetic energy?

• E

• N

• J

• kg.m/s

Which event illustrates the direct transformation of potential to kinetic energy?

• A volleyball player blocks an incoming ball.

• A sleeping cow stirs awake

• The wide-open spring door closes slowly

• The spring of a broken toy shoots up.

It is equal to the difference between the heat taken in by the system and the work done by the system.

• Potential energy

• Kinetic energy

• Mechanical Energy

• Internal energy

How does water from the deep well move upward?

• It occurs naturally.

• It uses water heat pump.

• It is a spontaneous process.

• It flows from higher temperature to a cooler temperature.

Heat engine converts mechanical energy to thermal energy.

• TRUE

• FALSE

Mang Fermin, a carpenter, is planning a piece of wood with his planar. After a few minutes, he observed that it is hot. Is there an evidence of heat transfer?

• There is no evidence.

• Yes, hotness means there is an increase in temperature.

• Yes, hotness means there is a decrease in the temperature

• No, hotness is not related to a change in temperature.

Which of the following is not included in the refrigeration cycle?

• compression

• evaporation

• precipitation

• expansion

While a gas does 400 J of work on its surroundings, 900 J of heat is added to the gas. What is the change in the internal energy of the gas?

• 500 J

• 400 J

• 900 J

• 1300 J