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Stack #4730275
| Question | Answer |
|---|---|
| What is sustainability | The harvesting of reasources year after year withought harming the environment |
| 3 laws of sustainability | Protects bio diversity, use renewable energy, recycle nutrients into the soil |
| What is science | Science is the study of how nature works, using that knowledge to predict how humans may affect nature |
| Define scientific hypothesis | A possible and testable explanation of what scientists observe in nature or in the results of their experiments |
| Define scientific theory | A widely accepted and well tested hypothesis that can change something or add new information |
| What is the difference between a scientific hypothesis and a scientific theory | A hypothesis is a possible explanation and a theory is a tested and accepted hypothesis that can change something’s outcome |
| What is the process of scientists questioning the data of their peers and trying their own experiments to prove or disprove the published results | Peer review |
| What is a scientific law | A scientific law is a theory that has been tested over and over again with the same outcome every time |
| What is the difference between a theory and a law | A law describes it and a theory explains why or how it happens |
| List 4 questions you can ask to determine the reliability | 1:have other scientists reproduced these results 2:are their no other reasonable explanations of the data 3:have the data and conclusions been subjected to peer review 4:are the conclusions of this research widely accepted? |
| What is a controlled experiment | A controlled experiment changes, one variable at a time while keeping all other conditions the same to see what happens |
| What did botanist F. H. Bormann and forest ecologist G. Likens try to measure in their controlled forest experiments | Soil depth, water depth, and nutrients from uncut forests |
| What where the results of Bormanns experiment | In an uncut forest, nutrient levels went down, along with the amount of water/soil/nutrients |
| How many scientific laws or rules of nature govern the changes that matter and energy undergo | 3 laws |
| What is step 1 of the scientific method | 1: make an observation |
| What is step 2 of the scientific method | 2: ask a question |
| What is step 3 of the scientific method | 3: make a hypothesis |
| What is step 4 of the scientific method | 4: gather/collect your data |
| What is step 5 of the scientific method | 5: do an experiment |
| What is step 6 of the scientific method | 6: analyze your results and come to a conclusion |
| What is step 7 of the scientific method | 7: put it out for peer review |
| Are variables changed in a controlled experiment or in a controlled group | Controlled experiment |
| What do we call the basic unit of matter used to make up all living and nonliving things? | Atoms |
| What are the charges that make up atoms? | Protons: positive charge, electrons: negative charge, neutrons: neutral or no charge |
| What makes up the nucleus of the atom? | Protons and neutrons |
| Where when you find negative charge particles of an atom | In the energy level surrounding/orbiting the nucleus |
| What is the number of protons to the number of electrons with a neutral charge in an atom? | Equal to |
| What is the term given to pure substance consisting entirely of the same type of atom? | Element |
| Define isotope | Atoms with extra neutrons in the nucleus |
| What do we call isotopes that have unstable nucleic that breakdown at a constant rate overtime | Radioactive |
| What do we call a molecule of two or more different kinds of atoms bonded together | Compound |
| Are the physical and chemical properties of the compound the same as the original element elements from which they were made | No |
| What holds two atoms together | Energy in chemical bonds |
| What do we call the compounds created by living things? | Organic |
| What does the word macromolecules mean? | Big molecule |
| What is the term referring to many molecules linked together to form a long chain | Polymer |
| Atomic mass is | The bottom number |
| Atomic number is | The top number |
| Electrons and protons are equal to | Atomic number |
| Atomic mass - atomic number= | Neutrons |
| What charge does an ion have? | They can have both positive and negative |
| Define matter | Matter is anything that has mass and takes up space |
| What are the four states of matter? | Solid liquid gas and plasma |
| What particle is the most basic building block of matter? | An atom |
| What is an atom made out of? | Other particles |
| What is the first form that matter can exist in define it? | Elements: cannot be broken down into simpler substances |
| What is the second form matter can exist in define it | Compounds: combinations of two or more different elements |
| What is the basic type of matter? | Element |
| What is the most common form of matter? | Compounds |
| What type of particles make up the center or nucleus of an atom and what are those charges? | Protons: positive electrical charge, neutrons: negative electrical charge |
| What makes a solution basic | A basic solution has more hydroxide ions and has a pH greater than seven |
| What is the law of conservation of matter? | Whenever matter goes under any type of chain matter cannot be created or destroyed |
| Are compounds and molecules the same thing | All compounds are molecules but all molecules are not compounds |
| What is a molecule | Any 2 atoms with a bond |
| Define fison | Splitting of atoms in nuclear power plants on earth |
| Define fusion | Joining of atoms under great heat and pressure that is caused by stars |
| What is hydroxide ions | OH- |
| what is OH- | Determine how basic or acidic a solution is |
| Protons are | Positive charge + |
| Neutrons are | No charge ≠ |
| Electrons are | Negative charge- |
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30fernanme