4th grade science Unit 1

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bdoering
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224900
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4th grade science Unit 1
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2013-06-24 19:44:39
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ASLS 4th grade science unit 1 flashcards
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  1. When an organism is no longer alive on earth.
    extinct
  2. The smallest unit that makes up all living things.
    Cell
  3. The living and nonliving things in an environment, and all their interactions.
    ecosystem
  4. The set of steps in which organisms get the food they need to survive.
    food chain
  5. Any evidence of an organism that lived in the past.
    fossil
  6. A organism's home.
    habitat
  7. The largest group into which an organism is classified.
    kingdom
  8. A group of tissues that work together to do a certain job.
    organ
  9. Harmful substances added to Earth's water, air, and land.
    Pollution
  10. The smallest group into which an organism is classified.
    spicies
  11. A group of similar cells that work together to carry out a job.
    tissue
  12. A group of organs that work together to carry out life functions.
    Organ system
  13. Any of the one-celled organisms that live in water.  They look like a blob with a dot in the middle.
    Protist
  14. What is one thing looking at fossils can help you know?
    How loving things have changed over time.
  15. What part of a cell is missing from all bacteria?
    Nucleus
  16. Scientists classify organisms into 6 groups:  ancient bacteria, true bacteria, protist, fungus, plant, and animal - these are called.....
    kingdoms
  17. Many fossils are skeletons preserved in this...
    rock
  18. The oldest fossils are in the oldest rock layers found in this layer of rock...
    bottom layer
  19. The youngest fossils are int he youngest rock layers found in this layer of rock...
    The top layer
  20. A period when many different species died out.
    mass extinction
  21. What do we call the living part of an ecosystem?
    Community
  22. What do we call a part of a community made up of one type of organisms.
    population
  23. What is an organisms home called?
    A habitat
  24. What do we call the organisms that break living and dead matter into simple chemicals?
    Decomposers
  25. What do we call the steps by which organisms get the food they need to survive?
    food chain
  26. What do we call acids in smoke from factory smokestacks mixed with water in the air that falls to Earth?
    acid rain
  27. If a drought changes an ecosystem into a desert what will happen to the plants?
    Only those that can live with little water will survive.
  28. A consumer is something that uses the food produced by a producer.  Name 3 consumers...
    beetle, bird, person....
  29. What can you find in a plant cell that you won't find in animal cells?
    chlorophyll
  30. Name another animal that would fit into this animal group:  tiger, cheetah, lion, cougar...
    cat
  31. Name 5 basic life functions that all living things carry out.
    • 1.   They all grow and develop.
    • 2.  They all use energy.
    • 3.  They all reproduce.
    • 4.  They all respond to the environment.
    • 5.  They all get rid of wastes.
  32. Name a producer....
    tree, flower, grass...
  33. Name a decomposer...
    fungi, bacteria, mold...
  34. Name a few things plant cells have that animal cells do not.
    chlorophyll, cell wall, and chloroplast
  35. All living things need these 4 things...
    water, oxygen, food, and shelter
  36. Name the three basic differences in plant and animal cells.
    covering, color, and shape
  37. The characteristics of a living thing that organisms in each kingdom share.
    traits
  38. Organisms are scientifically named by naming these two things in the correct order.
    genus and species (in that order)
  39. Name four things that can change an ecosystem.
    overpopulation, diseases, drought, and pollution.

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