Class 4 Science Chapter 2 Test 3 Welcome to your Class 4 Science Chapter 2 Test 3 1. The sun is the main source of energy in a/an _______. Electric system Water Ecosystem None of these 2. The series of eating and being eaten in an ecosystem is called __________. Balance diet Food chain Carnivores Herbivores 3. Corals are a part of beautiful ecosystem under ________ Ground Desert Rock Sea 4. Corals look like stone but actually these are _________. Plants Animals Stone Rock 5. 6. The animals which eat plants are called ______ Herbivores Carnivores Omnivores None of these 7. If the number of the aquatic producers increases in a pond beyond the limit, then fish and other living thing will die due to lack of _________. Oxygen Carbon dioxide Hydrogen All of these 8. The animals which eat both plants and animals are called ______ Herbivores Carnivores Omnivores None of these 9. In any food chain the third living thing is a ___________. Herbivores Carnivores Omnivores None of these 10. In any food chain the ________ living thing is herbivores. First Second Third Fourth 11. Animals produce_______ which is used by plants to make food. Oxygen Carbon dioxide Hydrogen All of these 12. Which of the following shows the correct food chain in an environment? Sun→Consumers→Producers→Decomposers Sun→Producers→Decomposers→Consumers Sun→Producers→Consumers→Decomposers 13. ________ are also called rainforests of the ocean. Coral Algae Lotus Bacteria 14. The plants make food with the help of : Sunlight Carbon dioxide Water All of these 15. Plants produce ______ during photosynthesis. Oxygen Carbon dioxide Hydrogen All of these Time is Up! Time's up
