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These all are machines because they make our work easier. These all don't use electricity or battery. For example- soap dispenser- When we press it from the top, it uses the air pressure to dispense the soap out. And like glue stick- There is a small plastic rod inside. And when we rotate the bottom part, the rod pushes the glue out.

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scale is a machine becuse it helps us in measure anything

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These are machines because they make our life easier. like, scissors help us to cut things smoothly and neatly. similarly pen helps us to write and to express our thoughts freely

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Pencil is a machine because they help us easily write clearly and you do not have to strain your hand like people used to in olden times because people used stones for writing

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Human body is also a machine because our brain tells our other organs what to do and our different body parts like skeletal system, muscles, joints work together like a machine. A robot which works on a battery is inspired by the scientific human body. Human body gets its energy from food and water and the human systems convert them to energy. Just like a robot human body also gets charged but with food and water.

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Stapler is machine because it helps in joining paper and scale help in measuring.

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A manual music box is a machine because it can play music without needing batteries or electricity ⚡️ . We use human energy to wind it up and play music 🎵

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These are machines because they make lives easier. For example in notebooks our work does not get lost but if we write on paper sometimes we forget where we kept the paper and if there were no lock and key then anyone can come at our house when we are out.

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Cycle , scissor and nail cutter are few examples of machine which does not use electricity or battery and help in making life easier.

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Rolling pin is also a machine because it makes our job easier of making breads

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other than pouring water because it will spill I can use water dispenser I just put the glass under the tap and press a button and the water comes without spilling a drop. If I pour it in a glass then it will spill and I would have to mop the floor.

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I press this button and the water comes out

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Machine- Box

A box can help u stay organized and it can keep something precious like a pearl necklace safe also it fits with force because u pull it to open & push to close it

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Rishika Puri

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Match box is a machine because it helps us light fire easily

by useing push force

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A Door

It requires push and pull force to be used. It does not require electricity or battery.

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Avika - I observed a see saw and noticed how it works 

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Avika - I observed a see saw and noticed how it works 