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"Turtle and Turtle" Pond Community PPT Courseware 3
Turtles and soft-shell turtles are well-known animals in my country. In recent years, because they are high-end delicacies at banquets, demand has surged and prices have soared. The number of wild turtles and soft-shell turtles has decreased sharply, but the related breeding industry has become increasingly prosperous.
Have you ever seen turtles and turtles living in ponds? What are their characteristics?
Look closely at turtles and turtles. What are the parts of their bodies?
Their bodies are divided into four parts: head, neck, trunk, tail and limbs.
How do turtles and turtles react when their bodies are touched?
When their bodies are touched, they are frightened and will retract their heads, limbs, and tails into their shells.
Use objects such as chopsticks and thin sticks, and do not touch them with your hands.
What are the characteristics of turtle and turtle shells?
The tortoise shell is like an oval box, made of hard bone fragments with a bulge in the middle.
The turtle shell is oval in shape and is the leathery skin of the turtle, which is much softer than the tortoise shell. There is a slightly raised groove in the middle of the turtle shell, and slightly raised gelatin skirts on both sides.
How do turtles and turtles crawl?
Their limbs are thick, short and strong, suitable for crawling on land, and are webbed, suitable for swimming in water; their toes have sharp claws, which are mainly used for digging and hibernation.
Breeding of turtles
Turtles usually lay their eggs in moist soil or sand on land. Most freshwater turtles lay no more than 20 eggs at a time, and some turtles can lay more than 80 eggs at a time. Depending on the temperature and the type of turtle, the eggs take three to four months to hatch. Sometimes if the soil covering the nest is too dry and hard, the hatchlings will not be able to leave their nest immediately after hatching and will have to wait for rain to loosen the soil before they can emerge.
reptile
It crawls on its belly close to the ground, has scales or hard armor on its body surface, and reproduces its offspring with eggs.
Exercise: Which of the following animals are reptiles?
lizard dog gecko
ant earthworm centipede
To identify whether an animal is a reptile, you should also know whether it has bones in its body
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"Turtle and Turtle" Pond Community PPT Courseware 2:
"Turtles and Turtles" Pond Community PPT Courseware 2 Observe the body composition and characteristics of turtles and turtles, their shell characteristics, their reaction to movement when frightened, their reproduction characteristics, their common characteristics of reptiles, their body surface having armor or scales, crawling and laying eggs... ... .. .Are they reptiles? ..
"Turtle and Turtle" pond community PPT courseware:
"Turtle and Turtle" Pond Community PPT Courseware Before learning new knowledge, let us first understand the status of this lesson in our unit! In this unit of science trip, we were at the bottom of the pond and first met a very familiar...