"Ants" PPT

Description

Qingdao version of third grade science volume 2, Ant PPT

Part 1: Pre-inspection

(1) Observation should be careful, work in groups and cooperate, and fill in the observation record form.

(2) Focus on observing the structure of the ant's body. Count how many parts does the ant's body consist of? What's on each part?

In-class exploration: The "family" of ants

Ants live in a very organized group. Ant colonies have a strict hierarchical division of labor. A nest of ants generally contains female ants (queen ants), male ants, worker ants, and soldier ants. The number of ants in each nest is different, ranging from dozens to tens of thousands or even hundreds of thousands, but generally 500 —2,000.

queen ant

It is the largest in the group, especially its abdomen. After mating with male ants in the air, it takes off its wings and looks for a place to build an ant nest. Its main responsibilities are to lay eggs, reproduce offspring and manage the group family.

Male ants:

The head is round and small, the upper jaw is underdeveloped, and the antennae are slender. Male ants have the shortest life span, only a few weeks, and their main function is to mate with the queen in the air.

Worker ants: They have no wings and are generally the smallest individuals in the group, but they are the most numerous. The most common ones we see are worker ants. Its main responsibilities are to build and expand nests, collect food, feed young ants and queens, etc., and are the main body of the "family".

Ant PPT, part 2: deepening the situation

The situation deepens:

Do you want to make two insect models?

After class, please find materials and make each person an insect model. In the next class, we will hold an "Insect Model Exhibition", okay?

In-depth remarks:

1. Types and division of labor of ants:

All ants live in social groups. Generally there are four different types of ants in a colony:

Queen Ant - The leader of the colony, responsible for the reproduction of offspring.

Soldier ants - Responsible for fighting and resisting foreign enemies.

Male ants - Responsible for mating with the queen.

Worker ants - responsible for finding food and building ant nests.

2. Characteristics of insects:

The body is divided into three parts: head, thorax and abdomen. The head has a pair of antennae and the thorax has three pairs of legs. Think of such animals, we call them insects.

Common insects in life include: bees, ants, butterflies, crickets, locusts, aphids, cicadas, dragonflies, mantises, etc.

Ant PPT, Part 3: Classroom Exercises

1. Fill in the blanks:

1. The common characteristics of animals such as ants, bees, and butterflies are: the body is divided into three parts (head), (thorax), and (abdomen). The head has a pair (antennas) and the chest has (3) pairs of feet. Animals like this are called insects.

2. Antennas are important sensory organs of insects. They are responsible for smell and touch, and some also have hearing functions. They can help insects communicate, find the opposite sex, find food, and choose a place to lay eggs.

Second, short answer:

1. What are the common insects?

Answer: Bees, wasps, dragonflies, flies, mosquitoes, gadflies, butterflies, walking bugs, dragonflies, caddisflies, wasps, wasps, braconid wasps, parasitic flies, etc.

2. What are the types and division of labor of ants?

Answer: All ants live in social groups. Generally there are four different types of ants in a colony:

Queen Ant - The leader of the colony, responsible for the reproduction of offspring.

Soldier ants - Responsible for fighting and resisting foreign enemies.

Male ants - Responsible for mating with the queen.

Worker ants - responsible for finding food and building ant nests.

Keywords: Qingdao version third grade science PPT courseware for the second volume free download, ant PPT download, .PPT format;

For more information about the "Ants" PPT courseware, please click the "Ants PPT" tab.

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Update Time: 2024-06-18

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