Science Form 3

Which of the following describe the characteristics of non-renewable energy sources?

i) can be depleted if the usage is not controlled

ii) takes millions of years to be formed

iii) can cause environmental pollution

iv) have limited sources

• i, ii and iii

• i, ii and iv

• i, iii and iv

• ii, iii and iv

The statements below are about a type of energy source.

*The main source of energy

*Have heat and light energy

*Does not cause pollution

• Nuclear

• Water

• Geothermal

• Sun

Tags

NGSS.K-ESS3-3

The diagram shows the transmission and distribution of energy. What is the function of the National Grid Network?

• Transmit electrical energy all over the country through high voltage cable network

• Collect and channel the electrical energy to the consumers

• Store voltage for emergency use

• Lower the value of voltage to suit the supplied area

The following information shows the energy changes in a type of generators.

Potential energy -> kinetic energy -> electric energy

• Thermal generator

• Nuclear generator

• Biomass generator

• Hydroelectric generator

What is the form of energy used in the generation of electricity from wave energy?

• Geothermal energy

• Solar energy

• Kinetic energy

• Wind energy

Which of the following is changed by a transformers?

• Current

• Voltage

• Resistance

• Power

Which power station uses firewood as the energy source?

• Nuclear

• Biomass

• Thermal

• Hydroelectric

What is the energy change that occurs in a thermal generator?

• Gravitational potential energy > kinetic energy > electrical energy

• Chemical energy > heat energy > electrical energy

• Chemical energy > heat energy > kinetic energy > electrical energy

• Nuclear energy > heat energy > kinetic energy > electrical energy

Which of the following is true about the direct current?

• Generated in the power station

• Flows in two directions

• Its voltage can be increased and decreased

• Produced by a solar cell

The diagram shows transformer connected to a 5 volt power supply. Predict the value of the output voltage of the transformer.

• 5 V

• 7 V

• Less than 5V

• More than 5V