Question

directions: on a sheet of paper, for the correct answer, write the correct letter that responds to each statement. do not write on this paper! 1. an organism that eats only meat a. prey b. carnivore c. omnivore d. herbivore 2. an organism that creates its own food is called a) a producer b) a consumer c) a decomposer d) a carnivore 3. fireworks exploding and producing bright colors is an example of a a. physical change b. chemical change 4. __________ is anything that takes up space and has mass. a. density b. weight c. volume d. matter 5. what is a trophic level? a. each step in a food chain. b. amount of energy available in an ecosystem. c. each step in an ecosystem. d. all of the living organic matter in an ecosystem. 6. what type of feeder is a human? a. carnivore b. omnivore c. herbivore d. detritivore 7. a consumer is: a) an organism that produces its own food. b) an organism that does not need food to survive. b) an abiotic organism. d) an organism that cannot produce its own food 8. which of the following describes only physical changes? a. breaking a wooden board, lighting a candle, dissolving sugar in water b. lighting a candle, iron rusting, dissolving salt in water c. breaking a wooden board, baking pancakes that rise a little, chromatography d. adding spices to your food, breaking a wooden board, dissolving sugar in water 9. in the following food chain, which organism is the secondary consumer? grass -------> rabbit -------> snake -------> hawk a. grass b. rabbit c. snake d. hawk 10. mushrooms and other fungi are responsible for breaking down dead organic matter. in the ecosystem, they are a. producers b. consumers c. decomposers d. scavengers the ultimate source of energy for all organisms in life is a. water b. oxygen c. nitrogen d. the sun where do plants get the energy from to make food? a. radio button b. photosynthesis c. animals d. metamorphosis what trophic level would you find organisms that use the suns energy directly to make food? a. 1 b. 2 c. 3 d. 4

Explanation:

1. An organism that eats only meat is a carnivore. Prey is an organism that is eaten, omnivores eat both plants and animals, and herbivores eat only plants.
2. Producers, like plants, create their own food through photosynthesis. Consumers eat other organisms, decomposers break down dead matter, and carnivores eat meat.
3. Fireworks exploding is a chemical change as new substances are formed with different properties. Physical changes do not create new substances.
4. Matter is anything that takes up space and has mass. Density is mass per unit volume, weight is the force of gravity on an object, and volume is the amount of space an object occupies.
5. A trophic level is each step in a food - chain, representing the position an organism occupies in the flow of energy through an ecosystem.
6. Humans eat both plants and animals, so they are omnivores. Carnivores eat only meat, herbivores eat only plants, and detritivores eat dead organic material.
7. A consumer is an organism that cannot produce its own food and must eat other organisms for energy.
8. Breaking a wooden board and dissolving sugar in water are physical changes as no new substances are formed. Lighting a candle, iron rusting, baking pancakes, and chromatography involve chemical changes as new substances are created. Adding spices to food is a physical mixing.
9. In the food - chain grass→rabbit→snake→hawk, the rabbit is the primary consumer (eats the producer - grass), and the snake is the secondary consumer (eats the primary consumer - rabbit).
10. Mushrooms and other fungi are decomposers as they break down dead organic matter, recycling nutrients back into the ecosystem. Producers make their own food, consumers eat other organisms, and scavengers eat dead animals but do not break them down at a microscopic level like decomposers.
11. The sun is the ultimate source of energy for all organisms on Earth. Through photosynthesis, plants capture solar energy and convert it into chemical energy, which is then passed through food - chains.
12. Plants get the energy to make food through photosynthesis, a process that uses sunlight, carbon dioxide, and water to produce glucose and oxygen.
13. Organisms that use the sun's energy directly to make food (producers) are at the first trophic level.

Answer:

1. b. Carnivore
2. a. A producer
3. b. chemical change
4. d. Matter
5. a. Each step in a food chain.
6. b. omnivore
7. d) An organism that cannot produce its own food
8. d. Adding spices to your food, Breaking a wooden board, Dissolving sugar in water
9. c. Snake
10. c. Decomposers
11. d. The sun
12. b. Photosynthesis
13. a. 1