3. Electrical Energy and Power

 

______(a) is the ability to do work while _____(b) is the amount of energy transferred or converted per unit time. (Use a comma to write the answer without putting the number to the answers)

What is the SI unit for power?

• Joules

• Watt

• Kg

• KW

Which of the following are renewable energies used to generate electricity?

• Natural gas

• Wave energy

• Nuclear energy

• Hydroelectric energy

Energy sources that are used to generate electrical energy are

• Generator

• Accumulator

• Dry cell

• Dynamo

Tags

NGSS.MS-PS3-5

What can we do to make sure the battery last longer?

• Try to recharge a non-rechargeable battery.

• Use correct size and type of battery

• Mix old with new batteries

• Remove battery from electrical appliances that are connected to direct current

Reaction chemicals in the battery are called …………….. and …………………

Which battery is usually used in CanSat?

• Generator

• Lithium Polymer Battery

• Lithium-ion Battery

• Solar cell

Tags

NGSS.MS-ETS1-2

How can a long-term mission satellite stay for a long period of time?

• Using a lot of batteries supply

• Using solar panel energy

• Installed with batteries that can withstand for years.

• Installed solar panel on satellite body to collect energy sources directly from Sun

What will happen if there is no Sun?

i. The temperature on Earth will be cold and icy

ii. Food production will be increased.

iii. No photosynthesis will occur in plants.

iv. Able to generate power supply.

• i and iii only

• i, ii and iv

• ii, iii and iv

• i and iv only

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

What will happen to the world if there is no power supply?

• Unable to generate electricity

• A world without a power supply will make our daily life work a lot easier.

• Telephone lines would be down and phone signal lost.

• Water supply would soon stop pumping clean water.