1. 1. Which of the following processes transforms radiant energy to chemical energy? A.Photosynthesis B.Respiration C.Decomposition

2. 2. The decay of biomass is a great advantage for farmers because ____ A. It provides oxygen to plants B. It provides nutrients to the soil C. It provides food to human

3. 3. Which organism in the food chain gets the highest amount of energy? A. Producers B. Herbivores C. Carnivores

4. 4. Which of the following contains organic compounds? A. Rocks B. Plants C. Sediments

5. 5.What element are all organic matter composed of? A.Hydrogen B.Helium C.Nitrogen D.Carbon

6. C6H12O6 NH2CH2COOH Fe2O3 NaCl 6. How many compounds listed above are considered organic compounds? A.1 B.2 C.3 D.4

7. 7.Which of the following do carbohydrates, like the cracker shown above, become during digestion? A Amino acids B Fatty acids C Lipids D Sugars

8. 8.What is the most distinguishing characteristic of a chemical change? A The appearance of a substance changes. B A new substance is formed. C The change can be reversed easily. D The identity of the substance remains the same.

9. 9.Which of the following examples best reflects selective breeding? A The mating of two particular sheep to produce thicker wool B A genetic mutation in an individual snake that improves its sense of smell compared to others in its population C A few individuals of an extinct species live in zoos D Two wolf packs live in geographically separate regions

10. 10.What is considered to be the lowest level of organization in a multicellular organism? A Cell B Organ system C Tissue D Organ

11. 11.If thinking from smallest to largest, the organ level of organization comes – A after organ system and before organism. B before organisms and after organ systems. C before organ system and after tissue. D after cells and before tissue.

12. 12. Cells can be best defined as – A the start of all living things on land. B the smallest living units of all living things such as plants and animals. C found in prokaryotic organisms only. D found in eukaryotic organisms only.

13. 13. Which organelle helps to create energy within the cell? A Mitochondria B Nucleus C Vacuole D Ribosomes

14. 14. How do birds respond when there is a lack of food, water, and shelter? A Reproduce B Hibernate C Hide D Migrate

15. 15. Examples of external stimuli include all of the following, except - A sunlight. B hunger. C lack of food. D a loud sound.

16. 16. A plant relies on abiotic factors such as the Sun, water, and soil for survival. A plant will grow toward sunlight. This reaction is known as – A tropism. B gravitropism. C phototropism. D positive response.

17. 17. How does the student’s body respond as his heart rate increases? A Hunger pains B Decreased body temperature C Breathing faster D Vomiting

18. 18. Which of the following shows chemical change happening in the digestive system? A. food being chewed in the mouth B. food reacting with gastric acids in the stomach C. digested food moving to the small intestine

19. 19. When carbohydrates are broken down, they change into _____. A. simple sugars B. larger molecules C. energy

20. 20. Which of the following requires more work? A. a person pushing a box on flat surface B. a person carrying a bag of grocery upstairs C. a boy sliding down the ramp

21. 21. What energy transformation is happening during photosynthesis ? A. electrical to chemical B. radiant to chemical C. chemical to nuclear

22. 22. What causes the plant B to wilt ? A. it has a lot of water B. it’s in a darks environment C. it lacks turgor pressure A B

23. 23. Roots of plants tend to grow downward, this is due to ___. A. Phototropism or response to light B. Thigmotropism or response to touch C. Geotropism or response to gravity

24. 24. Why is earth the only planet that can support life? A. It’s very close to the sun B. It’s very far away from the sun C. It is the perfect distance from the sun

25. 26. Photosynthesis manufactures or produces________. A. carbon dioxide and oxygen B. Oxygen and water C. Glucose and Oxygen

26. 26. Which of the following is not a producer? A. lion B. grass C. corn

27. 27. What is the difference between a plant cell and an animal cell? A. plant cells have a vacuole and animal cells do not B. plant cells have a cell membrane, animal cells do not C. plant cells have a cell wall and chlorophyll, animal cells do not

28. 28. The nucleus of the cell is comparable to the __________. A. Brain B. skin C. kidneys

29. 29. What body system controls growth, metabolism and releases hormones A. Nervous B. Digestive C. Endocrine

30. 30. Which of the following shows selective breeding? A. Finches changing their beaks over many generations B. Iguanas developing gills to survive in water C. Farmers cross pollinating plant to make a disease resistant variety

31. 31. The organelle in plants that is responsible for trapping sun’s radiant energy is - A. nucleus B. cell wall C. chloroplasts

32. 32. What body systems are involve in the absorption of nutrients to all cells of the body? A. Skeletal and Muscular B. Digestive and Circulatory C. Endocrine and Reproductive

33. 33. The peppered moth population surviving over time is due to- A.Selective breeding B.Natural selection C.Behavioral adaptation D.Migration