There are several ways of defining a continent. In Japan, it is taught that there are six continents on the earth. The six continents are Eurasia, Africa, North America, South […]
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Three states of matter
All matter can be classified into three states: solid, liquid, and gas. Solid: A solid has a definite shape and volume. Liquid: A liquid has a definite volume but takes […]
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Metamorphosis
Butterflies undergo metamorphosis through four stages of development. Egg: An adult lays eggs on a leaf of a plant. Larva: An egg hatches into a larva (caterpillar). It eats leaves […]
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The human skeleton
There are 206 bones in the human body. They make up the skeleton, which supports and retains the body. It also protects the brain and internal organs. Some bones are […]
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The four forces of flight
There are four forces that act on aircraft: lift, weight, thrust, and drag. ・Lift: a force generated by wings that holds an airplane in the air ・Weight: a force caused […]
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Sensu (Folding fan)
Sensu is a hand-held folding fan. The ribs are made of bamboo or sandalwood, and covered with paper or silk. Since it is foldable, it is easy to carry. When […]
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Uchiwa (Fan)
Uchiwa is a traditional Japanese fan. It is round and has a long handle. The frame is made of bamboo or plastic, and covered with paper. Uchiwa is used for […]
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Car suspension
The suspension of a car enables it to drive smoothly on the road. This system absorbs bumps and jolts caused from driving on rough road surfaces and maintains driving stability. […]