Science 7 Final Review

1. Science 7 Final Review

2. Living things have basic needs. The four basic needs of living things are: • food, clothing, gas exchange, love • water, gas exchange, habitat, protection • food, water, habitat, space • gas exchange, water, food, habitat

3. Gas exchange, water, food, habitat

4. Tapeworms living inside the intestines of humans are an example of a symbiotic relationship. The tapeworms absorb nutrients from the foods humans eat, stealing these nutrients from the bodies they inhabit. Based on this information, which type of symbiotic relationship is this? • Commensalism • Mutualism • Parasitism • Predator/prey

5. Parasitism

6. Which term refers to the gradual process by which some species replace other species in an ecosystem? • Species replacement • Succession • New growth • Habitat loss

7. Succession

8. Know the four main processes in the water cycle

9. Bioaccumulation • Occurs when pollutants enter into the food web and accumulate in the higher level consumers.

10. Extinction occurs when no individuals of a species are left: • in a particular area • anywhere in the world • In a specific ecosystem • In a controlled area

11. Anywhere in the world

12. The lynx’s niche in this ecosystem is: • Parasitism • Endangered • Prey • Predator

13. Predator

14. Be able to identify examples of producers, consumers, and decomposers

15. Zebra mussels are not native to the Great Lakes area and were discharged accidently from ships. Now they are a serious problem since they have no natural predators in the area and take space and food from other organisms in the area. Zebra mussels are examples of: • indicator species • introduced species • biological control • pesticides

16. Introduced species

17. Be able to identify the levels of the pyramid of numbers

18. Identify the manipulated, controlled, and responding variables • A student did an experiment on the growth of bread mould. The mould was grown in three identical containers each containing an equal amount of nutrients. One container was kept at 100C, one was kept at 20oC, and one was kept at 60oC. At the end of four days, the amount of mould in each container was recorded.

19. Know the difference between active and passive solar heating

20. Substances with high thermal energy have _________ particles. • Fast moving • Average moving • Slow moving • No moving

21. Fast moving

22. a. SOLID LIQUID b. d. c GAS • Know the different changes of state

23. Where and why would you use an infrared thermogram? • Hint 

24. What do A, B, and C represent?

25. Know the difference between: • Diffusion • Radiation • Conduction • Convection

26. There is a small teacup of water at 80oC and a large kettle of water at 20oC. Which statement best describes the situation? • The average energy in the teacup is higher than in the kettle. • The average energy is similar for both. • The average energy in the kettle is higher than in the teacup. • If the two samples are mixed, heat does not transfer.

27. The average energy in the teacup is higher than in the kettle.

28. Know examples of renewable and non- renewable resources

29. Know examples of natural and manufactured structures

30. Know examples of mass, shell, and frame structures

31. Know examples of : • Compression force • Tension force • Shear force • Torsion force

32. Which word does NOT fit with the word COMPOSITE? • A type of material • More than one material • Different materials with different strengths • Glued

33. Glued

34. What process do you use to melt two different metals together to make a rigid joint?

35. Soldering

36. On your desk at school, the weight of the wood and metal of the desk itself make up the • First-class lever • Live load • Metal fatigue • Dead load

37. Dead load

38. What are force and mass measured in?

39. Which of the following is a true statement? • a. The force of gravity depends on the mass of objects and distance between them • b. The greater the mass of the objects, the smaller the force of gravity between them • c. Weight remains the same wherever you are in the universe • d. The greater the distance between the objects, the smaller the force of gravity between them

40. The force of gravity depends on the mass of objects and distance between them

41. Know the definition of sustainability

42. Which of the following is the best example of a taproot? • Carrot • Potato • Onion bulb • Grass

43. Carrot

44. Know the difference between: • Embryo • Pollen grain • Sepal

45. Know the parts of the flower and what they represent • Anther • Sepal • Stigma • Petal

46. Healthy plants require large amounts of six nutrients. All of these nutrients have specialized functions. Fertilizer usually contains three of the six nutrients, including; • nitrogen, potassium, sulphur • phosphorus, sulphur, calcium • potassium, nitrogen, phosphorus • magnesium, potassium, calcium

47. potassium, nitrogen, phosphorus

48. Know the process of selective breeding

49. Diffusion is the tendency of particles in a gas or liquid to become • Less concentrated, in areas of high concentration • Highly concentrated, in areas of low concentration • Evenly distributed, by moving from an area of low concentration • Evenly distributed, by moving from an area of high concentration

50. Evenly distributed, by moving from an area of high concentration