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Understanding Ecosystems and Earth's Crust: Grade 7 Exam Edition

This Grade 7 exam edition covers essential concepts in ecosystems, Earth's crust, and the particle theory of matter. Students will explore abiotic conditions affecting organisms, primary producers, cellular respiration inputs and outputs, and human impacts on ecological succession. The section on Earth's crust discusses plate tectonics, sedimentary rocks, geothermal energy, and soil erosion prevention techniques. Additionally, it introduces methods of separating substances and the fundamental principles of the particle theory of matter, providing a comprehensive review for students.

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Understanding Ecosystems and Earth's Crust: Grade 7 Exam Edition

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  1. Grade 7 Exam Edition

  2. Ecosystems -10 • List at least 3 ABIOTIC conditions that can effect the kinds of organisms living in an ecosystem:

  3. Ecosystems -10 • Amount of sunlight • Precipitation • Soil conditions • Growing season

  4. Ecosystems -20 • This level of the ecological pyramid uses photosynthesis to produce energy:

  5. Ecosystems -20 • Primary Producers

  6. Ecosystems -30 • These organisms start and then finish the process of decomposition (two different types):

  7. Ecosystems -30 • Scavengers • Microorganisms

  8. Ecosystems -40 • Name these inputs and outputs of cellular respiration:

  9. Ecosystems -40 • Glucose (Food) • O2 (Oxygen • Outputs: • H2O (Water) • CO2 (Carbon Dioxide) • Energy

  10. Ecosystems -50 • These are three ways that humans can negatively impact ecological succession:

  11. Ecosystems -50 • Use of pesticides • Spread of invasive species • Logging and mining • Urban sprawl (lawns?) • Over-fishing • Pollution • Etc…

  12. Earth’s Crust - 10 • The thickest of the Earth’s layers, this layer is mainly composed of silicate rock.

  13. Earth’s Crust - 10 • The mantle

  14. Earth’s Crust - 20 • These three phenomena are attributed to plate tectonics:

  15. Earth’s Crust - 20 • Volcano eruption • Earthquakes • Mountain formation • Continental drift

  16. Earth’s Crust - 30 • This type of rock is formed when little bits of eroded rock are deposited and compressed.

  17. Earth’s Crust - 30 • Sedimentary

  18. Earth’s Crust - 40 • These are two reasons why geothermal energy is considered to be sustainable.

  19. Earth’s Crust - 40 • Renewable • Lower green house gas emissions

  20. Earth’s Crust - 50 • These are four ways that farmers can prevent erosion from wind and water.

  21. Earth’s Crust - 50 • Contour-cultivated hillsides and slopes • Use of gullies and pathways for water movement • Planting cover crops in the fall • Use of a tree line or shelter as windbreak • Minimize tilling • Crop and animal rotation • Planting grasses for animal foraging

  22. Particle Theory of Matter -10 • This is a solution in which no more solute can be dissolved.

  23. Particle Theory of Matter -10 • Saturated solution

  24. Particle Theory of Matter -20 • This change of state happens over a lake on a hot day. Name it and the states of matter it effects

  25. Particle Theory of Matter -20 • Evaporation, liquid, gas

  26. Particle Theory of Matter -30 • List all four methods of separation that we used in the lab.

  27. Particle Theory of Matter -30 • Evaporation, Filtration, Magnetism, Sedimentation.

  28. Particle Theory of Matter -40 • This type of heat transfer occurs in fluids and creates a circuitous current.

  29. Particle Theory of Matter -40 • Convection

  30. Particle Theory of Matter -50 • These are the five points of the particle theory of matter.

  31. Particle Theory of Matter -50 • All matter is made out of particles • Particles in a pure substance are the same • Particles are always moving and they speed up as they gain energy • There is space between particles • There is attraction between particles

  32. Forces and Structures- 10 • These are the three different types of structures.

  33. Forces and Structures- 10 • Solid, Shell, Frame

  34. Forces and Structures- 20 • This type of forces pulls on both ends of a structure in opposite directions.

  35. Forces and Structures- 20 • Tension

  36. Forces and Structures - 30 • These are three external forces that act on a house during the winter.

  37. Forces and Structures - 30 • Gravity • Wind • Snow weight • The ground

  38. Forces and Structures - 40 • These are three different building techniques that can make a structure stronger.

  39. Forces and Structures - 40 • Arches • Trusses • Foundation • Braces • Columns • Guy Wires

  40. Forces and Structures - 50 • If a 200 g bridge can hold a max load of 10 kg, what is its structural efficiency.

  41. Forces and Structures - 50 • .5 kg₂

  42. Grab Bag - 10 • The animal pictured here belongs to this level of the ecological pyramid:

  43. Grab Bag – 10 • Secondary Consumer

  44. Grab Bag - 20 • Tectonic plates are part of this rocky “sphere”.

  45. Grab Bag– 20 • Lithosphere

  46. Grab Bag - 30 • This is an example of what type of solution?

  47. Grab Bag – 30 • Homogeneous solution

  48. Grab Bag - 40 • Name the two different types of lenses used in the device pictured here:

  49. Grab Bag – 40 • Ocular lens • Objective lens

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