Lesson 11: Name Date Read each question and circle the letter next to the correct answer. 1. Yucca moths lay eggs in yucca flowers. When the eggs hatch, the larvae eat yucca seeds. The moths help pollinate the flowers. What type of symbiosis is this? A. mutualism B. commensalism C. parasitism 2. Chemical messengers in the endocrine system carry signals to organs and glands to respond to bodily changes. What are these messengers called? A. homunculus B. hormones C. tissues D. cells 3. When an organism dies, what happens to the nutrients that have been transferred to it? A. The nutrients are lost. B. The nutrients are recycled back to the soil. C. The nutrients are multiplied. D. The nutrients cause the organism to rot and decay. 4. Imagine you see a famous person. Which best explains the process of how your nervous system senses the person, then instructs you to ask for an autograph? A. eyes spinal cord - brain spinal cord mouth B. eyes spinal cord mouth C. eyes brain mouth D. brain eyes mouth page 1 of 7
Lesson 11: TRUE or FALSE. If the statement is false, correct it. 5. (Two point Question) Once water and air are used by an organism, they are lost to the environment forever. A. True B. False 6. (Three point question) Match the method of how to separate solutions to its description. Evaporation A solvent is used to separate colors in a solution on an absorbent paper. Distillation The solution is boiled and the solute remains behind. A solution is poured through a strainer to seperate large particles Paper chromatography The solution is boiled and the evaporated liquid is collected while the solute remains. page 2 of 7
Lesson 11: Fill in the blanks with words from the Word Bank to complete the sentences. solvent population solute immigration emigration solution gram community 7. A tomato plant is an individual. A group of tomato plants growing in your backyard is a. 8. In a mixture of salt and water, both substances mix evenly, down to individual molecules. Saltwater is a. 9. (Two points) Salt dissolves in water. In a mixture of saltwater, salt is the and water is the. 10. (Two points) A population of organisms changed by more organisms moving into the area is an example of. A population changed by organisms moving out of the area is an example of. page 3 of 7
Lesson 11: 11. (One point for each question) Label the brain, spinal cord, and nerves in the illustration. 12. (One point for each question) Label the brain, adrenals, thyroid, pituitary gland, and pancreas in the illustration. page 4 of 7
Lesson 11: 13. Write the solubility of solid 1, 2, and 3 at 50 C. 14. Study solid 1. What happens to its solubility as the water temperature increased? 15. (Two points) Assume that solid 1 is sugar and solid 3 is salt. Would you expect the same amount of sugar and salt to dissolve in the same amount of water? Why or why not? page 5 of 7
Lesson 11: 16. Draw a food chain containing the sun, a producer, a consumer, and a decomposer. Draw arrows to show the transfer of energy. 17. (Three points) Explain in writing how energy is transferred through the food chain you ve drawn. 18. Name an example of parasitism. 19. Name one learned behavior and one innate behavior. 20. Explain the difference between a population, a community, and an ecosystem, using the hare as an example. page 6 of 7
Lesson 11: 21. (Two points) Name two resources a population of hares may compete for. 22. (Two points) To answer all of these questions, your brain needed to get information about the outside world. How did your brain direct the nerves in your hand to write an answer? page 7 of 7