These are some examples of famous inventions that really improved our quality of life. Hope you find them useful!
1. Light bulbs
This invention allows us to see and work in the dark. Long ago before lights are invented, we cannot do much during night time, even if you light up a candle, it won't last long and they may catch other things on fire. Light bulbs can be used for a long time, and they're a lot safer and there's a lot more we can do in our lives in nighttime nowadays. Even though yes LEDs are taking over, but before LED is invented, light bulbs are certainly important.
2. Steam Trains
This improves the transportation. Before steam trains are invented, people usually travel either by walking or they ride animals such as horses. Steam trains can give us a fast way to go to another location.
3. Radio
Radio gives us a simple and fast way to send messages and spread information to far locations. This is very useful especially back then, where people can spread information during wars or other emergency situations. We can contact others faster.
Answer:
hope this helps:)
Explanation:
Page 1
Radio waves are used in wi-fi signals. This frequency has the lowest energy
Microwave waves are used in microwaves (wow that's a tongue twister - say that 5 times fast) to heat foods and liquids, which also are present in smartphones.
Infrared waves are used in night vision cameras and remote controls.
Visible light waves let us predict the weather through clouds.
UV waves are used in suntanning and killing bacteria.
X-rays are used to view fractured or broken bones. They can spot pneumonia and breast cancer as well!
Gamma waves kill cancerous cells and are used in oncology. This frequency has the highest energy.
Page 2
Violet light has the shortest wavelength
1. Reflection
2. Refraction
3. Absorption
Page 3 *i'm not 100% on these so take this sparingly*
1. Water
2. Glass
3. Air
Light travels <em>slower</em>
Sound travels <em>slower</em>
Page 4
105 is the least dense
50 is the densest
Page 5
A. Solid
B. Freezing - top
Melting - bottom
C. Liquid
D. Condensation - top
Vaporization - bottom
E. Gas
Answer: When someone refers to the voice of a story they are talking about the way it is written, is it written informatively, or is it opinionated.
The words the writer chooses can tell you how they feel about the topic, aka voice their thoughts.
Explanation:
