Grade 6 Science & Technology · Strand 1: Living things and the Environment · Inverterbrates
General Characteristics of Invertebrates
A short Grade 6 Science & Technology lesson for the CBE curriculum, part of Living things and the Environment: Inverterbrates. Learn it on any phone with notes and slides, then check yourself with a quick quiz and earn XP. This lesson is free.
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1. Which feature do ALL invertebrates share?
- A. A hard external shell
- B. No internal bony backbone
- C. A body divided into three regions
- D. Left and right sides that mirror each other
2. Which statement correctly explains how an earthworm holds its shape and burrows without any bones?
- A. It has a thick shell made of calcium carbonate.
- B. Pressurised fluid in its body chambers acts as a hydrostatic skeleton.
- C. It has tiny internal ribs in each ring.
- D. Its skin is completely rigid and cannot stretch.
3. A grasshopper, a crab and a spider are supported by a rigid outer covering made of chitin. What is this covering called?
- A. Hydrostatic skeleton
- B. Vertebral column
- C. Exoskeleton
- D. Calcium shell
4. What name is given to the movement in which an earthworm alternately contracts its circular and longitudinal muscles to move forward?
Type your answer in the lesson.
5. Why do we not see dog-sized beetles living on land?
- A. Beetles have no muscles for walking.
- B. Water on land is too heavy for beetles.
- C. Beetles have a backbone that limits their growth.
- D. A large exoskeleton would be too heavy, and oxygen reaches the body only over short distances.
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