1. Indiana Science Grade 7 Pages 14 - 21
Living Things
Indiana Science Grade 7
Pages

2. Living Things How are living things, or organisms, alike?
Living things are organized.
The Cell – the smallest unit of an organism
Each cell contains an orderly structure
And contains genetic information

3. Living Things Living things respond.
A stimulus – anything that causes some change in an organism.
Response – the way an organism reacts to a stimulus.
Example: Getting a leash out = dogs go crazy!!
.Homeostasis – maintaining the proper conditions in a organism/cell.

4. Living Things Living things use energy. Living things reproduce.
Autotroph = produces own energy (plant-like)
Heterotroph = eats energy (animal-like)
Living things reproduce.

5. Living Things Living things grow and develop.
Growth of many-celled organism (multicellular) is due to an increase in the number of cells.
Growth of a single-celled organism (unicellular) is due to an increase in the size of the cell.
.Development – changes that take place during the life of an organism.

6. Living Things What do living things need? A place to live – habitat.
.Raw materials – like water, proteins, fats, and sugars.

7. Living Things Where Does Life Come From?
.Spontaneous Generation – early theory that living things could come from nonliving things; ie. mice from hay stacks, snakes from logs…
Was later disproved by Pasteur in mid-1800s.

8. Living Things
.Biogenesis – theory that living things come only from other living things.
Alexander Oparin’s hypothesis on the origins of life – gases on Earth’s early atmosphere combined to form complex compounds found in living things.

9. Living Things
4 Gases:
.Ammonia
.Hydrogen
.Methane
.Water Vapor
Miller and Urey tested Oparin’s hypothesis and showed that chemicals (amino acids) found in living things could be produced.

10. January
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday 1
Earth forms 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 31 25 26 27 28 29 30

11. February
Monday
Tuesday
Wednesday
Thursday
Friday
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Sunday 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
Oceans turn yellow from bacteria 27 28

12. March
Monday
Tuesday
Wednesday
Thursday
Friday
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Sunday 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
Bacteria begins to form into groups 23 24 25 26 27 28 29 30 31

13. April
Monday
Tuesday
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Thursday
Friday
Saturday
Sunday 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

14. May
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Tuesday
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Friday
Saturday
Sunday 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 30 24 31 25 26 27 28 29

15. June
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Tuesday
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Saturday
Sunday 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

16. July
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Tuesday
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Friday
Saturday
Sunday 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31

17. August
Monday
Tuesday
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Saturday
Sunday 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31

18. September
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday 1 2 3 4 5 6 7 8 9
(3.1 billion yrs)
Green Algae – oxygen appears 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

19. October
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 31 25 26 27 28 29 30

20. November
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday 1 2 3 4 5 6 7 8 9
Blue green algae appears 10 11 12 13 14 15 16
Trilobites appear 17 18 19 20 21 22 23 24 25 26
Fish and plants appear 27 28 29
Land animals &
Arthropods appear 30

21. December
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday 1
Amphibians appear 2 3 4 5 6 7 8 9 10 11 12 13
Dinosaurs appear 14 15 16 17 18 19 20 21 22 23 24 25 26
Dinosaurs extinct 27
Mammals appear 28 29 30 31
Last 2 hours humans
Last min = writing

22. Living Things Vocabulary Review (use the Living Things Voc sheet)
Organism
Heterotroph
Cell
Unicellular
Homeostasis
Multicellular
Autotroph
Stimulus
Response