Download Grade 7 Science Study Guide 2

Grade 7 Science Study Guide
Unit 1 Interactions and Ecosystems
1. Define the following terms.
Ecology:
Ecosystem:
Niche:
Habitat:
Adaptation:
Ecosystem:
Symbiosis:
Sustainability:
Ecological Footprint
Mutualism:
Parasitism:
Biotic:
Abiotic:
Food Chain:
Food Webs:
Biomass:
Bioaccumulation:
2. What are the characteristics of a parasite?
3. Define the following terms and give two examples of each:
Commensalism:
Producers:
Consumers:
Herbivores:
Carnivores:
Predators:
Prey:
Omnivores:
Scavengers:
Decomposers:
4. List the four things all living things need:
5. Draw a Food Chain and label the producer, primary (1st order), consumer secondary
(2nd order) consumer and tertiary (3rd order) consumer.
6. Give the definition of a natural resource and list three examples.
7. What is the difference between a ‘want’ and a ‘need’? Give examples.
8. List the three R’s that can be used to help the environment.
9. Can animals adapt to human habits? If so give an example.
Cycles in the Environment
10. What are the main processes in the water cycle?
11. Define the following terms:
Evaporation:
Transpiration:
Condensation:
Precipitation:
Ground Water:
Run-off:
Pollution:
Acid rain:
Succession and Change in an Ecosystem
12. Define the following terms:
Succession:
Primary Succession:
Secondary Succession:
Biological Control:
Extinction:
13. What are some of the problems encountered with Introduced Species?
14. Name two examples of introduced species.
Environmental Monitoring
15. Define the following terms:
Ecosystem Monitoring:
Physical Monitoring:
Environmental Monitoring:
Chemical Monitoring:
Biological Monitoring:
Indicator Species:
Baseline Data:
Permanent Plots:
Environmental Impact Assessment:
16. What makes a good indicator species and why?
Unit 2 Plants for Food and Fibre
Topic 1 – People and Plants
17. What is Fibre?
18. Give five examples of uses for plants.
19. Name four plants that are used to make clothing.
20. There are two different types of root systems. Name them are give a description of
each.
21. Give three examples of common baking products that are derived from plants.
22. Name three field crops that are common to Alberta.
23. Name three plants that can be used to make medicine. What is the name of the
medicine they make?
24. Name to plants that have been used to aid transportation and how they have been
used.
Topic 2 – Structure and Adaptations
25. Name three functions of plant roots.
26. Define the following terms:
Taproot:
Root hairs:
Fibrous Roots:
Diffusion:
Differentially Permeable Membrane:
Osmosis:
Photosynthesis:
Stomata:
Respiration:
Transpiration:
27. What are the functions of the stem?
28. What are the leaves used for in plants?
29. What makes the leaves green?
Topic 3 – Plant reproduction and Breeding
30. What is selective breeding?
31. Define the following terms:
Genes:
Sexual reproduction:
Asexual/vegetative reproduction:
Grafting:
Cones:
Pollination:
Flowers
32. What is a flower’s main job?
33. Define the parts of the flower:
Stamen:
Pistil:
Petals:
Sepals:
Stigma:
Style:
Ovary:
Filament:
Anther:
34. Draw a flower and label the parts.
35. List the three steps of pollination.
36. What is fruit?
37. List three ways seeds are dispersed.
38. What is Germination?
39. What are the following plant tissues used for?
Xylem –
Phloem –
Cambium –
Heartwood –
Topic 4 – Meeting the Need for Food and Fibre
40. What is irrigation and why do farmers use it in their fields?
41. What does monoculture mean?
42. What does the term erosion mean and what causes it?
Topic 5 - Sustaining the Soil
43. List the 5 main factors of soil development.
44. What is humus and what is it used for?
45. What does salinization mean and what causes it?
46. List the four key types of decomposers used to break down dead organisms so plants
can use the nutrients.
47. What are the six nutrients required by plants?