Part 3 — Ants Colony Behavior (Hành vi đàn kiến)
Bài giảng thực tế về hành vi của loài kiến — chủ đề khoa học tự nhiên thường gặp trong Part 3. Bài này kiểm tra khả năng hiểu chi tiết và suy luận.
"Ants are everywhere, aren't they? Have you ever stopped to think about how amazing these tiny creatures are? They might seem small and insignificant, but ants play a huge role in our environment.
They live in colonies that can have thousands, even millions, of ants, all working together to support the colony. Each ant has a specific job — some are workers, some are soldiers, and of course, there's the queen. The queen's main job is to lay eggs, while the workers find food and build the nest. Soldiers defend the colony from predators.
Ants use chemicals called pheromones to send messages. When an ant finds food, it leaves a trail of pheromones for other ants to follow. This is why you often see ants walking in a line — they're following the chemical trail left by the scout ant.
Ants are incredibly strong for their size. They can carry objects that are 10 to 50 times their own body weight! Imagine if you could carry a car over your head — that's what it's like for an ant carrying a piece of food.
They help to clean up the environment by eating dead insects and breaking down organic material. They also aerate the soil, which helps plants grow better."
5 câu hỏi trắc nghiệm
Câu 31: What is the purpose of this talk?
A. To warn people about dangerous ants
B. To explain how to get rid of ants
C. To highlight fascinating aspects of ants
D. To compare ants with other insects
Câu 32: What does "pheromones" mean in this context?
A. A type of food ants eat
B. A chemical ants use to communicate
C. A sound ants make to warn others
D. A color ants use to attract mates
Câu 33: Why do ants leave pheromone trails?
A. To mark their territory
B. To scare away predators
C. To find their way home
D. To guide other ants to food
Câu 34: What is true about ant strength?
A. They are the strongest animal in the world
B. They can lift objects much heavier than themselves
C. They can only carry light objects
D. They are stronger than humans
Câu 35: What does the speaker imply about ant habitats?
A. Ants only live in forests
B. Ants are harmful to the environment
C. How adaptable ants are
D. Ants are becoming endangered
Đáp án và giải thích
Câu 31: C — To highlight fascinating aspects of ants
Mở đầu bài giảng: "Have you ever stopped to think about how amazing these tiny creatures are?" — mục đích là giới thiệu những khía cạnh thú vị về loài kiến, không phải cảnh báo hay hướng dẫn diệt kiến.
Câu 32: B — A chemical ants use to communicate
Transcript định nghĩa rõ: "Ants use chemicals called pheromones to send messages." — pheromone là hóa chất dùng để giao tiếp.
Câu 33: D — To guide other ants to food
Transcript nói: "When an ant finds food, it leaves a trail of pheromones for other ants to follow." — mục đích là dẫn đường cho kiến khác tìm thức ăn.
Câu 34: B — They can lift objects much heavier than themselves
Transcript nói: "They can carry objects that are 10 to 50 times their own body weight!" — kiến mang được vật nặng hơn cơ thể chúng rất nhiều lần.
Câu 35: C — How adaptable ants are
Mở đầu nói "Ants are everywhere" và kết thúc nói kiến giúp ích cho môi trường (ăn côn trùng chết, làm tơi đất). Ngụ ý kiến rất dễ thích nghi.
Từ vựng quan trọng
| Từ | Nghĩa | Ngữ cảnh trong bài |
|---|---|---|
| colony | quần thể, đàn | live in colonies with millions of ants |
| pheromone | chất dẫn dụ | chemicals called pheromones |
| predator | kẻ thù, động vật ăn thịt | defend the colony from predators |
| scout | kiến trinh sát | the scout ant finds food first |
| organic material | vật chất hữu cơ | breaking down organic material |
| aerate | làm tơi, thông khí | aerate the soil for plants |