Pelangi Primary Education Smart Plus Science P3 TextBook samplebook

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© Pelangi Publishing (Thailand) Co., Ltd. 2019 All rights reserved. No part of this publication may be reproduced, stored in any retrieval system or transmitted in any form or by any means without permission of Pelangi Publishing (Thailand) Co., Ltd. 2019

ISBN 978-616-541-322-0 First Published 2562


Chapter

1

Basic Needs of Animals and Humans Humans and animals need food to survive. What are the other needs of humans and animals for survival?

K.W. L .W What do I know about the basic needs of animals and humans? 1. 2. 3.

K.W. L .W What else do I want to know about the basic needs of animals and humans? 1. What do animals need to survive? 2. What do we need to survive? 3.

Basic Needs of Animals and Humans

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A

Needs of animals

Let’s Find Out ! Needs of pets List the things that your pet needs. Compare your list with your friends’. What are the similar things that pets need?

There are a few things that animals need in order to stay alive and grow well. They need food, water and air. Without these, they will die. Animals need food. Food gives them energy to do their daily activities. There are some animals that eat plants only. They are known as herbivores.

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A horse eats grass.

A panda eats bamboo.

A butterfly feeds on nectar from a flower.

A tortoise eats leaves.

Science Prathomsuksa

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A horse eats grass.


Some animals eat other animals. They are known as carnivores.

A crocodile eats chickens.

A lion eats deer.

An owl eats mice.

A praying mantis eats insects.

Omnivores eat both plants and other animals.

A monkey eats fruits, vegetables and insects.

A pig eats meat, grains and vegetables.

Let’s Think ! What do tigers, chickens and cows eat?

Basic Needs of Animals and Humans

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Animals need water. Water helps their body to function properly. It helps to regulate their body temperature. It also helps in the transportation of nutrients and waste materials in their body.

A herd of elephants drink from a river.

A bird drinks from a trough.

A tiger drinks from a river.

Bears drink from a river.

Some animals do not drink from a direct source of water. Caterpillars, kangaroo rats and koalas get their water supply from the food they eat.

Caterpillar

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Kangaroo rat

Koala


Animals need air to breathe. They breathe in oxygen to generate energy from the food they eat. Animals on land get their air directly from the atmosphere. They breathe in air through their nose into their lungs. Air Air

Lion

Duck

Most aquatic animals get their air supply from the water with their gills. However, some aquatic animals such as seals, whales and dolphins do not have gills but lungs. They need to resurface to get air. They can stay in the water without breathing for long periods.

Seal

Whale

Dolphin

Let’s Think ! All living things breathe in oxygen and give out carbon dioxide. Will the supply of oxygen in the atmosphere deplete in the future? Why?

Basic Needs of Animals and Humans

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If we have a pet at home, we need to ensure that it gets its basic needs. How do you do that?

We need to give proper food to our pets.

They also need clean water for drinking.

We need to make sure that they have plenty of fresh air.

Let’s laugh ! Q: Which side of a parrot has the prettiest feathers? A: The outside!!

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What did you have for your lunch? 1. Starting from today, list the food you eat for your lunch for five days in the table below. My lunch Day 1: Day 2: Day 3: Day 4: Day 5: 2. Did you have the same food for your five lunches?

3. What did you eat the most for the five days?

4. What did you eat the least for the five days?

5. Which foods do you like the most? Why?

6. What is your conclusion for this activity?

Basic Needs of Animals and Humans

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We eat a variety of foods. Do you know why? Foods rich in carbohydrates such as rice, noodles, pasta, potatoes and bread give us energy. We need energy to walk, run, play and to do work.

Rice

Noodles

Potatoes

Pasta

Bread

Fish, meat, eggs, milk and chickens contain proteins that help our body to grow and repair itself.

Fish

Meat

Milk

Egg

Chicken

Let’s Think ! Growing children are advised to take more milk, cheese, fish and meat. Do you know why?

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Fresh fruits and vegetables contain vitamins and minerals, such as vitamin C and potassium. This group of food helps us to stay healthy so that we do not fall sick easily.

Mangoes

Broccoli

Carrots

Brinjal

Watermelons

Cabbage

Bananas

Tomatoes

Growing children like you need all the three groups of food mentioned above to grow healthily.

Let’s Know More ! Salty snacks, soft drinks and candies are junk food. They are unhealthy and do no good to our body. We should avoid junk food.

Let’s Think ! Julie loves junk food. What happens if Julie continues to have junk food as her meals?

Basic Needs of Animals and Humans

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Do you eat the three groups of foods? 1. List the food that you ate for your lunch yesterday.

2. Categorize the food above into these three groups. Food that gives you energy

Food that helps you to grow

Food that helps you to stay healthy

3. Did your lunch contain all the three groups of food?

4. If not, what should you do?

5. What is your conclusion for this activity?

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