ABeka Science 7 - Chapter 1 - Bold Words
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- (p.27) What is a "self-pumping" well called?
- Artesian well
- (p.26)Where do plant roots get their oxygen they need?
- Pore spaces
- (p.27) What is the upper surface of the saturated ground known as?
- Water table
- (p. 22) Nitrogen moved from the air to the soil to be used by plants and returned to the atmosphere to be used again is called ?
- Nitrogen cycle
- (p. 22) When nitrogen is combined with other elements it forms a compound known as ?
- Nitrates.
- (p.23) Where does bacteria live?
- Nodules
- (p.23) What does anaerobic mean?
- They thrive in the absence of oxygen
- (p.23) What is essential for cell division and cell growth?
- Phosphorus
- (p.16) Name the soil which is course and grity with large particles that may be easily seen and allows air and water into the soil.
- Sand
- (p.16) Smaller than sand, this type of soil feels similar to flour or talcum powder. Some particles may be seen only with a microscope.
- Silt
- (p.16) What type of soil has the smallest and most tightly packed particles?
- Clay
- (p. 16) What are pedologists?
- Scientist who study soil.
- (p.16) What soil contains a high weight percentage of silt?
- Silty soil
- (p.16) What type of soil contains a high weight percentage of sand?
- Sandy soil
- (p. 16) What soil has particles that are packed closely together, macking it difficult for water and air to move through?
- Clayey soil
- (p.18) Name the two types of pH substances scientists use to describe the soil.
- Acidic, basic, or neutral.
- (p.21) Define nutrients.
- Mineral and organic portions of the soil which supply nourishment for plants.
- (p.3.) What did the early scientist beleive about God?
- Most of them believed that God created us.
- (p.3) What is the pupose of science?
- to carefully observe nature and to try to discover the laws of creation so these laws can be put to work for the benefit of mankind.
- (p.4) Why was bacon important?
- he was important to the development of natural science because he promoted learning and introduced the scientific method of studying nature.
- (p.4) What is the scientific method?
- It is a systematic way in which scientists gather and pursue scientific knowledge.
- (p.4) What are the three main parts of the scientific method?
- Hypothesizing, observing, and experimenting.
- (p.6) Name the six steps of the scientific method.
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1. State the problem
2. Gather information
3. Formulate a hypothesis
4. Test your hypothesis
5. Record and analyze
6. State the conclusion - (p.6) What is an experimental group?
- the group on which a test is performed
- (p.6) What is a control group?
- the group used as a standard for comparison.
- (p.6) What is a constant?
- conditions present in both the control group and the experimental group throughout the experiment.
- (p.7.) What are variables?
- conditions present only in the experimental group.
- (p.7) What do you do when you are testing a hypothesis?
- always limit the number of variables to one
- (p.9) What is an environment?
- The surrondings of an organism or group of organisms.
- (p.9) What is a mineral?
- material not derived from living organisms.
- (p.9) What are organic?
- material derived from living organisms.
- (p.10) What does decompose mean?
- to break down, to leave behind.
- (p.10) What does humus mean?
- rich organic particals
- (p.10) What does recycling mean?
- using materials again and again
- (p.10) What does weathering mean?
- rocks are broken down into soil
- (p.10) What does subsoil mean?
- Weathered particles wash down through the topsoil and settle into a lower layer.
- (p.11) What does bedrock mean?
- Below the soil lies a layer of solid rock.
- (p.12) What is exfoliation?
- rocks continually crack, pieces break away as large boulders or pebbles.
- (p.12) What is quartz?
- the most common mineral in the earth's crust
- (p.13) What is chemical weathering?
- changes the composition of the original material.
- (p.13) What is erosion?
- The natural process by which wind, streams, or ice (glaciers) carry away fragments caused by weathering.
- What is a "self-pumping" well called?
- Artesian well