Question

Complete the following sentences using the words in the box below:fill the blanks food lightning fireflies electricity fuels chemical Sun energy fire see Light is a form of It is needed for us to things and for plants to make their Most of our light energy comes directly from the Other natural sources of light include the stars, and Animals such as glow-worms, and some deep-sea fish give out light and as a result of reactions in their bodies. Light energy is also given out by burning passing through light bulbs. 1​

Answer 1

आई डोंट नो दिस आंसर Hydrogen Helium Lithium beryllium Boron carbon Nitrogen Oxygen and fluorine sodium magnesium aluminium Silicon Phosphorus Sulphur chlorine organ potassium calcium Canadian Titanium vanadium chromium manganese and Cobalt Nickel copper zinc

Answer 2

Answer:

Energy is invisible yet it’s all around us and throughout the universe. We use it every day, we have it in our bodies and some of it comes from other planets! Energy can never be made or destroyed, but its form can be converted and changed. For example, the chemical energy we get from our food turns into kinetic and thermal energy (see below) when we walk and sound energy when we shout. Here’s a great video by scientists showing the many ways that energy can be transferred and converted.

The following chapters describe the various forms energy can take and the story behind humans, energy, fuel and the environment.

Types of energy

First let’s take a look at the different forms energy can take and how they can be converted.

Running manKinetic - Anything that moves has this kind of energy. To run, cycle, climb and move the mouse for a computer we use kinetic energy.

SunRadiant - Radiant energy means light. Examples of things that have radiant energy are the Sun, lightbulbs and our computer screens. Plants convert light energy into chemical energy (food) which helps them to grown, this is known as photosynthesis.

SpeakerSound - The louder we shout the more sound energy we are using. Apart from our voices there are plenty of other examples of sound energies - guitars have sound energy when plucked using kinetic energy. So do the brakes on our bikes when we’re traveling fast.

FireThermal - If you’ve ever worn thermal underwear you might guess that thermal energy is about heat! The sun gives off thermal energy, as do radiators and fires. Even lightbulbs when they’ve been on for a long time - ouch!