Term
|
Definition
| Science is an organized way of using evidence to learn about the natural world. The word science also refers to the body of knowledge that scientists have built up after years of using this process. |
|
|
Term
|
Definition
Observations: the process of gather information about events or processes in a careful, orderly way. Data: information gathered from observations |
|
|
Term
What is the difference between a Hypothesis and a Theory |
|
Definition
| A hypothesis is a proposed scientific explaination, while a theory is a well-tested explaination that unifies a broad range of observations. |
|
|
Term
| How do you design an affective experiment? |
|
Definition
1: Ask a question 2: For a hypothesis 3: Set up a controlled Experiment- Whenever possible, a hypothesis should be tested by an experiment in which only one variable is changed at a time. All other variables should be kept unchanged, or controlled.
4: Record and analyze the results 5: Draw a conclusion Extra Notes: An experiment should be repeatable. |
|
|
Term
|
Definition
| Biology is the science that employs the scientific method to study living things |
|
|
Term
| What are the characteristics of life? |
|
Definition
- made up of units called cells
- reproduction
- based on a universal genetic code
- grow and develope
- obtain and use materials and energy
- respond to their environment
- maintain a stable internal environment
- change over time, as a group
|
|
|
Term
| what are the levels of organization? |
|
Definition
Molecules Cells Groups of Cells Organism Population Community Ecosystem Biome Biosphere Universe |
|
|
Term
|
Definition
atoms are the basic unit of matter. they are too small to cut, supposedly, and they have a neutral charge. they consist of electrons, protons and neutrons. protons have a positive charge, neutrons have a neutral charge and electrons have a negative charge. the protons and neutrons form the nucleus. the electrons orbit the nucleus. |
|
|
Term
|
Definition
| isotopes are atoms of the same element but differ in the number of neutrons. |
|
|
Term
|
Definition
| a compound is a substance formed by the chemical combination of two or more elements in definate proportions. |
|
|
Term
Whats the difference between Ionic Bonds and
Covalent Bonds? |
|
Definition
| an ionic bond is formed when one or more electrons are transferred from one atom to another, while a covalent bond is when one or more electrons are shared by two or more atoms. |
|
|
Term
|
Definition
| an ion is an atom with some kind of charge due to an ionic or covalent bond |
|
|
Term
| what is unusual about water molecules? |
|
Definition
A water molecule is polar because there is an uneven distribution of electrons between the oxygen and the hydrogen atoms. |
|
|
Term
whats the difference between Cohesion and Adhesion? |
|
Definition
| cohesion is an attraction between molecules of the same substance, while adhesion is an attraction between molecules of different substances. |
|
|
Term
What is a solution? what is a suspension? |
|
Definition
| a solution is a mixture of two or more substances that are evenly dissolved throughout the mixture, while a suspension is a mixture of two or more substances that do not dissolve, so the solvent is suspended in the solute. |
|
|
Term
|
Definition
| the pH scale tells you the concentration of H+ ions are in the solution. it ranges from 0-14, and @ 7, the H+ ions and the OH- |
|
|
