1. 6th grade Science Semester 1 Review

2. Which statement best explains why the Earth’s inner core is solid?
The pressure in the inner core is very high.
The temperature in the inner core is very high.
The magnetic forces in the inner core are weak.
The metals in the inner core are dense.

3. Which statement best explains why the Earth’s inner core is solid?
The pressure in the inner core is very high.
The temperature in the inner core is very high.
The magnetic forces in the inner core are weak.
The metals in the inner core are dense.

4. Which statement best describes Earth’s crust?
It is stationary and unable to move.
It is the most dense layer of the Earth.
It is thicker than the mantle and the core.
It is divided into continental and oceanic.

5. Which statement best describes Earth’s crust?
It is stationary and unable to move.
It is the most dense layer of the Earth.
It is thicker than the mantle and the core.
It is divided into continental and oceanic.

6. Which layer contains both the crust and the upper mantle?
Troposphere
Lithosphere
Asthenosphere
Hemisphere

7. Which layer contains both the crust and the upper mantle?
Troposphere
Lithosphere
Asthenosphere
Hemisphere

8. What determines the order in which you find the layers of the Earth?
The temperature of the layers.
The composition of the layers.
The pressure of the layers.
The density of the layers.

9. What determines the order in which you find the layers of the Earth?
The temperature of the layers.
The composition of the layers.
The pressure of the layers.
The density of the layers.

10. Which layer of the Earth consists of molten rock?
Crust
Asthenosphere
Lithosphere
Outer Core.

11. Which layer of the Earth consists of molten rock?
Crust
Asthenosphere
Lithosphere
Outer Core.

12. What best describes the Earth’s mantle?
A Low pressure, high temperature, and solid rock
B High pressure, low temperature, and solid rock
C Low pressure, high temperature, and molten rock
D High pressure, low temperature, and molten rock

13. What best describes the Earth’s mantle?
A Low pressure, high temperature, and solid rock
B High pressure, low temperature, and solid rock
C Low pressure, high temperature, and molten rock
D High pressure, low temperature, and molten rock

14. The inner core of Earth is solid because…
A it is under extreme pressure.
B it is made of metal.
C of Earth’s magnetic field.
D of the rate of Earth’s rotation.

15. The inner core of Earth is solid because…
A it is under extreme pressure.
B it is made of metal.
C of Earth’s magnetic field.
D of the rate of Earth’s rotation.

16. What role does density play in the position of the layers?
A The least dense layer is in the center.
B The least dense layer is at the top.
C Density is evenly divided among Earth’s layers.
D Density decreases then increases as you go toward the center of Earth’s layers.

17. What role does density play in the position of the layers?
A The least dense layer is in the center.
B The least dense layer is at the top.
C Density is evenly divided among Earth’s layers.
D Density decreases then increases as you go toward the center of Earth’s layers.

18. Which statement best describes the movement of the tectonic plates?
They move away from each other at convergent boundaries.
They move because of convection currents in the mantle.
C. They push together at midocean ridges.
D. They form at subduction zones.

19. Which statement best describes the movement of the tectonic plates?
They move away from each other at convergent boundaries.
They move because of convection currents in the mantle.
C. They push together at midocean ridges.
D. They form at subduction zones.

20. How would crustal plates most likely move to form the mountain shown above?
Plates A and B would move toward each other.
Plates A and B would move apart from each other.
Plate A would move away while Plate B stayed stationary.
Plates A and B would rub against each other.

21. How would crustal plates most likely move to form the mountain shown above?
Plates A and B would move toward each other.
Plates A and B would move apart from each other.
Plate A would move away while Plate B stayed stationary.
Plates A and B would rub against each other.

22. Which structure can form at a divergent plate boundary?
Volcanoes, due to the collision two plates.
Mountains, due to the collision of two plates.
Mid ocean ridges, due to the separation of two plates.
Earthquakes, due to the shearing of two plates.

23. Which structure can form at a divergent plate boundary?
Volcanoes, due to the collision two plates.
Mountains, due to the collision of two plates.
Mid ocean ridges, due to the separation of two plates.
Earthquakes, due to the shearing of two plates.

24. What happens when oceanic and continental crust collide?
The oceanic and continental crust will stop moving.
The continental crust will slip past the oceanic crust.
The continental crust will subduct under the oceanic crust.
The oceanic crust will subduct under the continental crust.

25. What happens when oceanic and continental crust collide?
The oceanic and continental crust will stop moving.
The continental crust will slip past the oceanic crust.
The continental crust will subduct under the oceanic crust.
The oceanic crust will subduct under the continental crust.

26. Which plate boundary would most likely form new oceanic crust?
Convergent boundary
Transform boundary
Divergent boundary
Subduction boundary

27. Which plate boundary would most likely form new oceanic crust?
Convergent boundary
Transform boundary
Divergent boundary
Subduction boundary

28. Where would an earthquake be least likely to occur?
Location 1
Location 2
Location 3
Location 4

29. Where would an earthquake be least likely to occur?
Location 1
Location 2
Location 3
Location 4

30. Which statement best describes plate motion along a fault line during the time between earthquakes?
A Plate motion stops, and plate tension decreases.
B Plate motion continues, and plate tension increases.
C Plate motion stops, and only the mantle moves.
D Plate motion reverses, and plates return to their original positions.

31. Which statement best describes plate motion along a fault line during the time between earthquakes?
A Plate motion stops, and plate tension decreases.
B Plate motion continues, and plate tension increases.
C Plate motion stops, and only the mantle moves.
D Plate motion reverses, and plates return to their original positions.

32. What happens when thin oceanic plates get pulled under thicker continental plates?
A A deep ocean trench is formed
B Underground rivers of water are created
C Extreme earthquakes are generated causing plates to split
D Mountains are built with possible volcanic eruptions

33. What happens when thin oceanic plates get pulled under thicker continental plates?
A A deep ocean trench is formed
B Underground rivers of water are created
C Extreme earthquakes are generated causing plates to split
D Mountains are built with possible volcanic eruptions

34. Seafloor spreading provides evidence of which Earth process?
A Erosion of coastlines
B Weathering of mountains
C Movement of crustal plates
D Formation of sedimentary rocks

35. Seafloor spreading provides evidence of which Earth process?
A Erosion of coastlines
B Weathering of mountains
C Movement of crustal plates
D Formation of sedimentary rocks

36. Which statement best explains how decomposers contribute to the formation of soil?
A They break rocks into smaller and smaller particles.
B They add organic material and nutrients to the soil.
C They transport small rock fragments into the soil.
D They drain excess water from the soil.

37. Which statement best explains how decomposers contribute to the formation of soil?
A They break rocks into smaller and smaller particles.
B They add organic material and nutrients to the soil.
C They transport small rock fragments into the soil.
D They drain excess water from the soil.

38. Which will most likely have the greatest effect on the ability of soil to hold water?
A The age of the soil particles.
B The color of the soil particles.
C The size of the soil particles.
D The texture of the soil particles.

39. Which will most likely have the greatest effect on the ability of soil to hold water?
A The age of the soil particles.
B The color of the soil particles.
C The size of the soil particles.
D The texture of the soil particles.

40. Which statement best explains why a farmer would NOT want to clear all the vegetation from his fields?
New soil would not be formed, decreasing fertility.
Rain and wind would easily carry away the soil.
Sunlight would destroy the nutrients in the soil.
Decomposers would have nothing to break down.

41. Which statement best explains why a farmer would NOT want to clear all the vegetation from his fields?
New soil would not be formed, decreasing fertility.
Rain and wind would easily carry away the soil.
Sunlight would destroy the nutrients in the soil.
Decomposers would have nothing to break down.

42. The soil in a field blows away over time
The soil in a field blows away over time. What would slow the erosion of this soil?
Watering the field daily.
Plowing the field in rows.
Planting trees around the field.
Building a fence around the field.

43. The soil in a field blows away over time
The soil in a field blows away over time. What would slow the erosion of this soil?
Watering the field daily.
Plowing the field in rows.
Planting trees around the field.
Building a fence around the field.

44. What is the most important function of soil for humans?
A. Absorbs water and solar energy
B. Contains rocks and minerals
C. Decomposes plant remains
D. Provides nutrients that support plant growth

45. What is the most important function of soil for humans?
A. Absorbs water and solar energy
B. Contains rocks and minerals
C. Decomposes plant remains
D. Provides nutrients that support plant growth

46. Which factor is most likely to cause soil erosion in a community?
A. Reduction in the population of earthworms and moles
B. Removal of nutrients from bad farming practices
C. Loss of plant cover due to construction
D. Water pollution from a local sewage plant

47. Which factor is most likely to cause soil erosion in a community?
A. Reduction in the population of earthworms and moles
B. Removal of nutrients from bad farming practices
C. Loss of plant cover due to construction
D. Water pollution from a local sewage plant

48. Orange trees have sweet smelling flower blossoms that produce fruit
Orange trees have sweet smelling flower blossoms that produce fruit. What is the purpose of the flowers?
To attract bees for pollination.
To feed birds and insects.
To protect the tree from disease.
To make perfume.

49. Orange trees have sweet smelling flower blossoms that produce fruit
Orange trees have sweet smelling flower blossoms that produce fruit. What is the purpose of the flowers?
To attract bees for pollination.
To feed birds and insects.
To protect the tree from disease.
To make perfume.

50. What is the main function of leaves?
Leaves store excess food created by the plant.
Leaves capture sunlight for photosynthesis.
Leaves provide a place for pollinators to sit.
Leaves absorb water and nutrients for the plant.

51. What is the main function of leaves?
Leaves store excess food created by the plant.
Leaves capture sunlight for photosynthesis.
Leaves provide a place for pollinators to sit.
Leaves absorb water and nutrients for the plant.

52. How do photosynthesis respiration work together to ensure survival of green plants?
Respiration breaks down sugar while photosynthesis makes sugar.
Photosynthesis breaks down sugar while respiration makes sugar.
Respiration helps the plant to breath while photosynthesis makes sugar.
Photosynthesis helps the plant to breath while respiration makes sugar.

53. How do photosynthesis respiration work together to ensure survival of green plants?
Respiration breaks down sugar while photosynthesis makes sugar.
Photosynthesis breaks down sugar while respiration makes sugar.
Respiration helps the plant to breath while photosynthesis makes sugar.
Photosynthesis helps the plant to breath while respiration makes sugar.

54. Which statement best explains the difference between the way animals and plants obtain the energy they need to survive?
Animals use only photosynthesis, while plants use both photosynthesis and respiration.
Plants use only photosynthesis, while animals use both photosynthesis and respiration.
Animals use only respiration, while plants use both photosynthesis and respiration.
Plants use only respiration, while animals use both photosynthesis and respiration.

55. Which statement best explains the difference between the way animals and plants obtain the energy they need to survive?
Animals use only photosynthesis, while plants use both photosynthesis and respiration.
Plants use only photosynthesis, while animals use both photosynthesis and respiration.
Animals use only respiration, while plants use both photosynthesis and respiration.
Plants use only respiration, while animals use both photosynthesis and respiration.

56. Which statement best describes the transfer of energy that initially enters this food web?
The kelp transforms solar energy into a form other organisms can use.
The sea otter gets more energy from the sea urchin, than the rocket fish.
The secondary consumers get their energy from primary consumers.
The shark ends up with the most energy in the food web.

57. Which statement best describes the transfer of energy that initially enters this food web?
The kelp transforms solar energy into a form other organisms can use.
The sea otter gets more energy from the sea urchin, than the rocket fish.
The secondary consumers get their energy from primary consumers.
The shark ends up with the most energy in the food web.

58. What is the best example of energy being transferred from an aquatic to a terrestrial food web?
deer eating grass
bear catching a fish
alligator eating a bird
frog catching a fly

59. What is the best example of energy being transferred from an aquatic to a terrestrial food web?
deer eating grass
bear catching a fish
alligator eating a bird
frog catching a fly

60. What is the main source of energy used by plants for growing and reproducing?
sugars made and stored during photosynthesis
nutrients absorbed from the soil
water taken in by the roots
carbon dioxide from the air

61. What is the main source of energy used by plants for growing and reproducing?
sugars made and stored during photosynthesis
nutrients absorbed from the soil
water taken in by the roots
carbon dioxide from the air

62. Which is an example of an organism becoming dormant to increase their chance of survival?
Birds flying south for the winter.
Beavers building a dam.
Plants producing flowers.
Trees losing their leaves

63. Which is an example of an organism becoming dormant to increase their chance of survival?
Birds flying south for the winter.
Beavers building a dam.
Plants producing flowers.
Trees losing their leaves

64. How does soil composition, light and temperature influence most land biomes?
It determines the amount of water available.
It determines what plants and animals can live there.
It determines if the land will be over populated.
It determines if the land will become polluted.

65. How does soil composition, light and temperature influence most land biomes?
It determines the amount of water available.
It determines what plants and animals can live there.
It determines if the land will be over populated.
It determines if the land will become polluted.