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Mrs. L Unit 1 BIO


explain why it is important to test a hypothesis in science? To see if the results of the hypothesis makes the hypothesis true.
What is the definition of science? An organized way of gathering and analyzing evidence about our natural world.
How is a hypothesis different than a theory? A hypothesis is just and idea and has not been tested, a theory has been tested many times with results being the same
How does an independent variable affect a controlled experiment? Only one Independent Variable (I can change) is changed so a scientist knows what caused a change if there was one.
How does a dependent variable affect a controlled experiment? When an independent variable causes a change in the results, this change is called the dependent variable.
Why is it important for a scientist to be curious (wonder about something or have questions)? In order to make a hypothesis a scientist must wonder about things and have questions about it.
What would be the independent variable in a paper airplane throwing contest? Why? The Independent variable would be the thickness of the paper used to make the airplane. The weight of the paper will affect the distance the airplane will fly.
Why is a peer review important to a scientist? To make sure there are no mistakes, claims that are not true, or unfair testing.
While doing a peer review, a scientist is skeptic about what he is reading. What is he thinking? He is questioning whether or not the hypothesis is true. He doesn't believe that the end result is correct.
What is homeostasis? When a living thing (a person) keeps itself healthy and stable when something from their environment (a virus) changes.
What is something our body does to maintain homeostasis? When it is cold outside, our body will react and produce more heat to help keep our body temperature at a healthy temperature of 98.6 .
What is data? Information learned from by performing an experiment and observing the results.
What is quantitative data? Information that can be measured or written in numbers
What is qualitative data? Information you get by using your five senses. Things you see, smell, hear, taste, touch.
What is a hypothesis? an IF and Then statement about science. ( Ex. If I drop this egg on to the carpet then it will break. Ex. If I turn on the faucet then water will flow out)
What would be a hypothesis for a plant growing experiment when the amount of light is the independent variable? If I put the plant on the window sill then it will grow faster than the plant not on the window sill.
If you do an experiment and it SUPPORTS the hypothesis , what needs to be done before this hypothesis can become a theory? It needs to be tested many times by other scientists and still get the same results.
How is the common DNA among all living things related to the idea of evolution? Through generations, living things have adapted to changes in their environments (evolve).
Are scientific theories considered to be facts or the absolute truth? Fact. If an experiment gets the same results then it is a fact that the results are the same.
Why does an organism need to be able to respond to a stimulus in its environment? To maintain homeostasis (be stable and healthy)
How does an earthworm (organism) respond to rain (stimulus)? They come out of the ground
A "tree of life" showing that all organisms came from a common ancestor (or relative) is what biology idea? evolution
What particles make up a carbon atom protons, neutrons, electrons
where are electrons found in an atom? outside of the nucleus in a area called the electron cloud
what atoms make up a water molecule and how many of each? Hydrogen--H--2 and Oxygen----O--1 = H2O (Micky Mouse)
What is a COvalent bond? atoms that SHARE electrons with each other like a COuple
How does a water meniscus form in a graduated cylinder? cohesion causes the water molecules to stick together accept the water close to the glass sides. This is where adhesion pulls the water molecules to the glass creating a curve.
Why is water a polar molecule? The uneven distribution of the electrons between the hydrogen and the oxygen. oxygen has the negative charge and hydrogens have the positive charge. (Mickey Mouse ears +++ )
What is a solution? the mixture you get when you combine different things and they are evenly distributed (pitcher of red kool-aid)
What is a solutE? A substance that gets dissolved. (Kool-Aid powder)
What is a solVent The substance that a solute gets mixed with (usually water)
What are acids? Anything that has below a 7 on the pH scale
What are bases? Anything that has above a 7 on the pH scale.
What is the chemical difference between an acid and a base? Acids contain Hydrogen ions (H+) and bases contain Hydroxide ions (OH-).
Why is carbon special in the kind and number of bonds it can make? Carbon can form so many different compounds because it can form 4 single covalent bonds.
what is the structure of an amino acid? it has a two-carbon bond. One of the carbons is part of the carboxyl group which has one Carbon and two Oxygen atoms.
What monomer makes up a protein? an amino acid
What monomer makes up a carbohydrate? a monosaccharide such as glucose
What monomer makes up a nucleic acid? A nucleotide
What are the functions of proteins? 1. controls the rate of chemical reactions 2. regulates cell processes 3. Forms cell structures 4. transports substances into or out of cells 5. Help fight disease
What happens to atoms during a chemical reaction? bonds between atoms in reactants are broken, and atoms rearrange and form new bonds to make the products.
How are reactants different than products? The reactants are molecules/compounds that go into chemical reactions and products are what are created by the chemical reaction.
What is the activation energy in chemical reactions? the least amount of energy required to activate atoms or molecules to a state in which they can go through a chemical reaction.
What is enzyme structure and function? Enzymes are catalysts for chemical reactions . They speed up reactions by providing an alternative reaction pathway of lower activation energy.
What is a catalyst? a substance that increases the rate of a chemical reaction.
Created by: mschlinks



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