LIFE SCIENCE (Biology)
EARTH SCIENCE
(Astronomy, Weather, Geology)
PHYSICAL SCIENCE (Matter, Elements)
SCIENTIFIC METHOD
MISCELLANEOUS
100
What is the difference between sexual and asexual reproduction?
Asexual reproduction is one parent "cloning" itself. Sexual reproduction involves two parents and produces more VARIETY.
100
How long does it take for the moon to revolve around the earth once?
28 days Also acceptable: about a month.
100
What are the three states of matter AND which one has the most energy?
Solid, liquid, gas GAS has the most energy
100
What is an educated guess called?
A hypothesis.
100
What is the main source of power that keeps our weather going?
The sun
200
Which kingdom of living things is multicellular and is a decomposer? (eats dead things)
The Fungi Kingdom
200
If you are looking at a cross section of rocks and see an earthquake fault line, how can you tell if the rocks or the fault line is youngest?
A fault line is younger than the rocks it cuts across.
200
What is the difference between a chemical and a physical change?
A physical change is a change in which the original substances stay the same substance. (No new stuff.) A chemical change is a change in which a new substance is produced. (New stuff, like a gas, etc.)
200
The scientific method's steps include a QUESTION, RESEARCH, a HYPOTHESIS......then what are the remaining steps?
Procedure or method Data collection Observations Conclusions (Communication with other scientists)
200
Water soaking into the ground gets filtered and cleaned. But when water does not go down there before it is reused, it can cause what in humans?
Disease (example, cholera in Haiti)
300
Name three of the six characteristics of living things.
1. Have cells. 2. Made of the chemicals of life (ex: carbon) 3. Use energy 4. Grow 5. Respond to their surroundings 6. Reproduce
300
Earthquakes, volcanic eruptions, and mountain building can all result from the movement of WHAT?
Tectonic plates
300
Explain how we separated the sand, salt, and iron filings in our 7th grade "Messy Mixtures" lab.
1.A magnet removed the iron. 2. Then we mixed the sand and salt with water. 3. We poured the saltwater through a filter and the sand stayed in the filter. 4. We heated the saltwater to evaporate the water.
300
A student is testing plants to see if more water will make them grow taller. Identify the CONSTANTS, the INDEPENDENT VARIABLE, and the DEPENDENT VARIABLE for this experiment.
In this experiment, the INDEPENDENT VARIABLE is the ONE THING that is being tested: the amount of water. The DEPENDENT VARIABLE is how tall the plants grow. The CONSTANTS are the other things that need to stay the same: amount of soil, type of plant, amount of sunlight, etc.
300
Oil (from which we get gasoline and plastics), coal, and natural gas are sources of NONRENEWABLE energy. We cannot renew them. Why not?
They are "fossil fuels," which took millions of years to form.
400
Pick one organ system besides the skeletal system and list the three levels of organization of that system. Example: The skeletal system is made of bones (organs) which are made of bone tissue, which are made of bone cells.
Example: The circulatory system is made of organs such as the heart, which is made of heart muscle tissue, which is made of heart cells. The nervous system is made of organs like the brain, which is made of nerve tissue, which is made of nerve cells.
400
What is the greenhouse effect?
Certain gases, like carbon dioxide, trap heat from the sun in our atmosphere.
400
The two main types of elements in the periodic table are the METAL and the NONMETAL. Name three differences between metals and nonmetals.
Metallic luster Good conductors of heat and electricity Malleable (easily hammered into a sheet) Ductile (easily drawn into a wire) Solid at room temperature High densities High melting and boiling points
400
Explain how it likely came to be that the finches on the different islands of the Galapagos Islands could NOT interbreed with each other.
1. Finches from the mainland migrated to the different islands and were SEPARATED from each other. 2. The finch populations eventually ADAPTED to the food and other conditions on their own islands. 3. The finch populations on the different islands became so different that they couldn't interbreed. (DIVISION) 4. The result of this process is SPECIATION.
500
Compare and contrast photosynthesis and respiration. Include their chemical equations and examples of organisms they occur in.
Photosynthesis: Energy + CO2 + H2O = glucose +O2 Respiration: Glucose + O2 = energy + CO2 + H2O The formulas are reversed. Photosynthesis occurs in plants and other organisms with chlorophyll. Respiration occurs in ALL organisms to convert food into energy.
500
Explain what causes the seasons.
A combination of Earth's tilted axis and Earth's revolution around the sun causes the sun to reach different parts of earth more directly at some times (summer) and less directly at other times (winter).
500
What are the three types of heat transfer? Give an example of each.
Conduction, convection, and radiation. Examples will vary.
500
What is the difference between a LAW and a THEORY?
A LAW is something which is known to be TRUE. Example: the law of gravity. A THEORY is a hypothesis with a great body of evidence behind it. It has NOT been proven to be false.
500
Give an example and describe how 1. Glaciers formed Minnesota's landscape. 2. Erosion formed Minnesota's landscape.
Glaciers formed our lakes by burying ice blocks in gravel as they melted. They also formed some river beds as massive amounts of ice melted. Erosion formed the Mississippi river gorge, where water dug a deep ditch through Mpls and St. Paul.
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