Page 12 - Science and Technology Std 3

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In the bottle, the grasshopper will be seen jumping. The
cockroach will be seen crawling. Jumping and crawling are
types of movement. Movement helps them to get their basic
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needs like food or safety from enemies. Small holes in the

bottles help the grasshopper and the cockroach to get air.
Without food and air they would die.

Characteristics of living things

All living things breathe, reproduce, grow and die. They also

move, feed and excrete. These characteristics are briefly described
below.

Breathing

Breathing is the process of taking air into and out of the lungs.
Lack of fresh air causes organisms to die.

Reproducing

Living organisms increase in number through reproduction.

Living things produce young beings which are similar to them.
For example, a human being gives birth to a baby while a cow
reproduces a calf. Plants reproduce seeds from which young
plants grow.

Figure 3 Reproduction in animals

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Ministry of Education, Science and Technology
Science and Technology 3.indd 5 03/08/2019 11:01