ASA REVIEW 7th GRADE

Elodea plants in beakers of water were placed at different distances from a light source. The number of bubbles that formed on the plants was counted and recorded. The data table shows the results Beaker Distance From Light Bubbles Per Minute 1 200 cm 2 100 cm 10 3 50cm 45 4 20cm 83 What gas do the bubbles consist of? Carbon dioxide c. water vapor Hydrogen d. oxygen What is the relationship between the distance from the light source and the rate of bubble formation? The rate increases as the distance increases The rate decreases as the distance increases The rate stays the same as the distance increases The rate changes in a way unrelated to distance

3. If another beaker with elodea were placed 150 cm from the light, about how many bubbles would form each minute? a. 1 c. 11 b. 7 d. 24 4. What is the independent variable in this experiment? a. type of plant c. distance from light b. number of bubbles d. amount of time

Plants and animals are typically multicellular organisms Plants and animals are typically multicellular organisms. For a long time, scientists tried to classify any unicellular organism that had a nucleus as either a single celled plant or single celled animal. One group of unicellular organisms, Euglenas, was particularly difficult to classify. These tiny organisms can be found living in most ponds. What is puzzling about euglenas is they have characteristics of both plants and animals. Some scientists argue that euglenas are more like plants because many of them have chloroplasts. Chloroplasts are cellular structures that enable both plants and euglenas to capture energy from the Sun. Other scientists argued that euglenas are more like animals because they can take in food particles from the water. Euglenas also have flagella, tail like structures that enable them to swim. The euglena even has an eyespot for sensing light. 5. What cellular structures enable plants and euglenas to capture energy from the sun? Flagella c. nuclei Chloroplasts d. eyespots.

6. What cellular structures are common to plants, animals, and Euglenas? Flagella c. nuclei Chloroplasts d. eyespots 7. In what way are euglenas different from both plants and animals? They have no nuclei c. they live in ponds They are unicellular d. they get energy from food

8. what does an eyespot do? a. senses light c. provides energy b. captures food d. senses movement 9. Having a flagella makes Euglena similar to animals because it allows euglenas to do what? a. eat c. sense light b. get energy d. move

10. A ___________ is a group of tissues that work together to perform a certain function. A. organ system B. organ C. cell D. organelle 11. Your heart functions because tissue like cardiac muscle, blood and connective tissues. At which level of organization is your heart? A. organ system c. cell B. organ d. organelle

13. Which of the following is listed from least to most complex? 12. The central nervous system consists of the brain and spinal cord. What is the CNS an example of? A. organ system c. cell B. organ d. organelle 13. Which of the following is listed from least to most complex? A. organ, organism, cell B. cell, tissue, organism, organ system C. cells, organ, organism D. tissue, organism, organ

14. Which of the following is an example of a tissue? A. chloroplasts B. stomach c. human D. bicep 15. Which statement is true about mitochondria? A. it has only one membrane B. it has no membrane C. it is circular D. it is where cellular respiration occurs

16. Where do eukaryotic cells store hereditary information? A. cytoplasm B. nucleus C. centrioles D. lysosomes 17. all body cells, except the sperm and the ova, are ___________ cells. A. germ c. somatic B. reproductive d. spindle

19. What is the result of mitosis? A. two identical cells with identical amounts of genetic material B. four cells that have half the genetic material of the parent C. two cells that have half the genetic material of the parent D. genetic variation, which is vital to species survival

20. which statement does not correctly describe living things? A. they must grow B. they use sexual reproduction C. they use metabolism D. they are made of cells 21. which statement below correctly describes an organism’s response to environmental stimuli? A. water in a rain cloud freezes to form snow B. solar radiation heats the soil to create wind C. flowers bloom in springtime D. in a desert, evaporating water leaves behind salts

22. which statement correctly describes a metabolic process? A. Animals take in oxygen for cellular respiration B. sea turtles come ashore only to only eggs. C. baby orangutans learn from their mothers to build tree nests D. adult male lions roar to protect their home territory

23. which characteristics listed below is common to all living organisms? A. able to move B. uses sunlight to trap energy C. reproduces using eggs D. maintains homeostasis

Animal Cell

Plant Cell

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25. How are chloroplasts and mitochondria similar? A. Both capture and use the Sun’s energy. B. Both change energy from one form to another. C. Both combine oxygen with food to produce energy. D. Both contain chlorophyll to make food and release energy.

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42. What is one major function of the lymphatic system? A. transporting oxygenated and deoxygenated blood B. providing support and structure for the body C. transmitting information from the environment to the brain D. preventing foreign particles from entering the bloodstream

43. How does the stomach aid in digestion? A. it mechanically breaks down fats B. it chemically and mechanically breaks down food C. it mechanically breaks down sugar D. it chemically breaks down proteins

44. what is the main job of the respiratory system? A. deliver carbon monoxide to the important parts of the body B. pumping blood to the capillaries C. taking oxygen needed for respiration D. taking in carbon dioxide for cells to use

Linnaeus’s classification system Phylum Kingdom Family Order Class Species Genus

45. If two organism belong to the same order, they must belong to the same a. class B. genus C. species family

46. An organisms specific name is based on how it is classified 46.An organisms specific name is based on how it is classified. Which of the following classification levels determine the name? A. kingdom and phylum B. genus and species C. class and order D. kingdom and species

47. To which kingdom do mushrooms belong? A. eubacteria B. Protista C. fungi D. plantae 48. An organism is multicellular and made up of eukaryotic cells. The organism can move from one place to another. Its cells do not have cell walls or chloroplasts. In which kingdom does it belong? B. animalia C. plantae D. fungi

Photosynthesis Sunlight + 6CO₂+6H₂O C₆H₁₂o₆ + 6O₂

Cellular Respiration C₆H₁₂O₆+6O₂ energy + 6CO₂+6H₂O

49. Which of the following statements is true? A. plants use chlorophyll to produce carbon dioxide B. plants break down chlorophyll as food C. plants use chlorophyll to trap sunlight D. plants store chlorophyll as waste