Life_Science_Grade7
Terms
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A well-tested idea that explains a wide range of observation in science.
- Theory
- A suggested solution to a scientific problem.
- Hypothesis
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The theory that living things come from non-living matter.
- Spontaneous generation
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The theory that living things come from living things.
- Biogenesis
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An organism that can make its own food.
- Producer
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An organism that cannot make its own food.
- Consumer
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Break down dead organic material and recycle it back into the environment.
- Decomposers
- Groups of similar cells make up these.
- Tissues
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Similar tissues make up organs. Similar organs make up organ systems. This is an example of
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Level of organization
- Includes being composed of cells, using energy, needing water, reproducing, and not living forever.
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Characteristics of living things
- The movement of water from an area of high concentration to an area of lower concentration and not requiring energy.
- Osmosis
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Coming to a conclusion based on observation.
- Inference
- An example of this occurs when yeast releases energy from sugar without the use of oxygen.
- Fermentation
- Sugar is an example of this, a compound that contains carbons.
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Organic compound
- What you see, hear, smell or taste with your senses.
- Observations
- The one variable that is changed to test a hypothesis.
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Manipulated variable
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A group in which all the variables except for one remain the same.
- Control group
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The factor that changes because of the manipulated variable.
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Dependent variable (sometimes called the experimental group)
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Cells use oxygen to break down sugar in a process called ...
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Respiration
- Are different forms of a gene.
- Alleles
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Letters are used to represent alleles in a ...
- Punnett Square
- Capital letters are used to represent these.
- Dominant alleles
- The basic unit of inheritance.
- Gene
- Chromosomes are composed of ...
- DNA
- This is the phase that the cell spends most of its time.
- Interphase
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Eggs and sperms are other names for ...
- Gamets
- 23 pairs is the number of ...
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human chromosomes
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Petrified wood is an example of ...
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fossils
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The change in species over time
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Evolution
- The largest number and diversity of organisms is found in this level of classification.
- Kingdom
- A group of organisms that can reproduce among themselves are considered to be part of the same ...
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Species
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Scientific names are made up of the ...and species names of the organism.
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Genus
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Organisms without an organized nucleus such as bacteria are described as ...
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Prokaryotes
- Organisms that produce their own food
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Autotrophs
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Members of this kingdom can be animla-lik, plant-like or fungus-like.
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Protist
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Fungi are made of a mass of thread-like tubed called ...
- Hyphae
- A waxy layer on the outer covering of leaves.
- Cuticle
- The openings on the underside of the leaves that allow water to exit the leaf while letting in Carbon Dioxide.
- Stomata
- The opening and closing of these holes (stomata) are controlled by ...
- Guard cells
- The organs of plants that are responsible for anchoring, absorbing water, and storing food.
- Roots
- Process that uses sunlight, water and carbon dioxide to make sugar and oxygen.
- Photosynthesis
- Parts of the plant that make the food by photosynthesis.
- Leaves
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The green pigment that most plants use to absorb sunlight for photosynthesis.
- Chlorophyll
- The vascular tissue that carries water and minerals in a plant.
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Xylem
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Food is carried throughout the plant using this.
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Phloem
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Animals with a backbone
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Vertebrates
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Animals without a backbone
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Invertebrates
- An external covering on all arthropods
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Exoskeleton
- Some arthopods go through stages which include egg, larva (caterpillar), pupa, and adult. This process is ...
- Complete metamorphosis
- Other arthropods go through stages which include egg, nymph, adult. This process is ...
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Incomplete metamorphosis
- An ecosystem is composed on biotic and abiotic factors. Fungi is an example of this type of factor.
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Biotic factor
- An ecosystem is composed on biotic and abiotic factors. Water is an example of this type of factor.
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Abiotic factor
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This is composed of producers and consumers.
- Food chain
- Plants are the first link in any ...
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food chain
- In the water cycle, this process involves water going from a liquid to a gas station.
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Evaporation.
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The process of rain, snow, sleet or hail falling upon the earth.
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Precipitation
- Evaporation and precipitation make up the water ...
- Cycle
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A flock of Canadian Geese in a field is an example of this.
- Population
- The flock of Canadian Gees, along with rabbits, robins, worms, flies and grass and weeds of the field make this up.
- Community
- Pennsylvania is part of the Deciduous Forest ...
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Biome
- Flagellates living in the gut of termites.
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Mutualism
- If you don't mow your grass for several years, your backyard will eventually become a field and then a forest. This gradual change in communities is ...
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Succession