Animals Practice Worksheet
| # | Answer |
|---|---|
| 1 | An animal is a living organism that gets food by eating other organisms and can usually move from place to place. |
| 2 | Animals are consumers. |
| 3 | Respiration. |
| 4 | All animals are multicellular. |
| 5 | To break down food and absorb nutrients. |
| 6 | Lungs. |
| 7 | Vertebrates. |
| 8 | Invertebrates. |
| 9 | Fish, bird, reptile, amphibian, or mammal. |
| 10 | An insect, worm, spider, crab, or jellyfish. |
| 11 | Endotherms. |
| 12 | Ectotherms. |
| 13 | Birds. |
| 14 | Reptiles. |
| 15 | A major change in body form during development. |
| 16 | Pupa or chrysalis stage. |
| 17 | It supports the body, protects organs, and helps with movement. |
| 18 | An exoskeleton. |
| 19 | An endoskeleton. |
| 20 | Muscles contract and relax to move body parts. |
| 21 | To blend in with their surroundings for protection or to catch prey. |
| 22 | The natural place where an organism lives. |
| 23 | An organism’s role in its ecosystem, including how it gets food and interacts with others. |
| 24 | An animal that eats plants. |
| 25 | An animal that eats other animals. |
| 26 | An animal that eats both plants and animals. |
| 27 | Different teeth help animals eat different kinds of food. |
| 28 | Predators hunt and eat other animals, helping control populations. |
| 29 | Prey are animals that are hunted and eaten by predators. |
| 30 | A sequence showing how energy passes from one organism to another. |
| 31 | Because plants make their own food through photosynthesis. |
| 32 | A network of interconnected food chains in an ecosystem. |
| 33 | Less energy is available at each higher level. |
| 34 | A trait that helps an organism survive and reproduce in its environment. |
| 35 | Examples include thick fur, sharp claws, webbed feet, or a beak shape. |
| 36 | Examples include migration, hibernation, or hunting in groups. |
| 37 | A period of inactivity and lowered metabolism during cold or food-scarce seasons. |
| 38 | Seasonal movement from one place to another. |
| 39 | They allow fish to take in oxygen from water. |
| 40 | They are adapted to different environments during their life cycle. |
| 41 | In an open system, blood is not always inside vessels; in a closed system, blood stays within vessels. |
| 42 | It can move blood and nutrients more quickly and effectively. |
| 43 | To exchange oxygen and carbon dioxide. |
| 44 | The digestive system breaks down food, and the circulatory system carries nutrients to cells. |
| 45 | Different cells can perform specific jobs, making the organism function better. |
| 46 | A group of similar cells that work together to perform a function. |
| 47 | A body structure made of different tissues working together. |
| 48 | They need to keep internal conditions stable so their body systems can function properly. |
| 49 | It can cause prey populations to increase and disrupt the balance of the ecosystem. |
| 50 | The rabbit population may decrease because competition for food will increase and some rabbits may not get enough resources to survive. |