NATURAL SCIENCES 15-04-2020

TECHNOLOGY: OBJECTS AND MACHINES

What is this woman doing in the picture?

Yes, she's vacuuming the carpet with a vacuum cleaner!!!. Does your hoover look like this one in the picture?
In this unit we are going to learn about important  discoveries and inventions and how they have changed our lives.
Do you know what the word "technology" means?
Look up the meaning of the word in the dictionary WORDREFERENCE and write down the definition in your notebook:
TECHNOLOGY is....
We use technology every day in many different ways. At home we use a lot of different machines and gadgets that help us cook and clean the house. We also use technology for entertainment and to study.
Now look at these pictures. These inventions you can find practically in all the houses, but they look a little bit different nowadays. Can you guess what they are? (Click on the pictures to enlarge them)
Write in the "comments box" your guesses starting with:
I think in the picture 1 this is a..
In my opinion, this is...
It might be....
I'm not sure but it looks like a...

Picture 1

Picture 2

Picture 3

Picture 4

Picture 5

Have you figured out which machine is in the picture 5?

You're right it's a MICROWAVE OVEN! It's one of the first microwaves that were used to prepare food. The first microwaves were huge! Can you imagine one of these in your kitchen?

Who invented this machine?

When was it invented?

How was it invented?

Let's watch this video and learn about the history of invention of the microwave oven and see how microwaves have changed through the decades. 
Before watching consult the following words in the dictionary WORDREFERENCE 

STOVE - 
KNOB -
MATCH- 
NUKE- 
FLUKE-

In the video they mention that the first microwaves weighted 750 pounds. To calculate how many kilograms it is, divide 750 pounds by 2,2. Have you worked it out? 
After you watch the video,  take this VERY short  MICROWAVE QUIZ

I'M LOOKING FORWARD TO HEARING FROM  YOU!