| AB |
physics and also chemistry| the 2 key branches of science |
| technolgy | can ideal be characterized as used science |
| Pure science | continuing search for brand-new knowledge |
| scientific law | is the summary of a natural event |
| Make predictions | For a scientific theory to it is in valid, it must allow you to.... |
| scientific model | a representaion of a real event or object |
| Matter | has mass and takes increase space |
| element | a substance the cannot be damaged down into simpler substances |
| H2O | has 2 H atoms and also 1 O atom |
| chemistry | the science of what matter is made of and how the changes |
| molecule | the the smallest unit of a substance that behaves favor the substance |
| Dalton's atomic theory | every facet is made of atoms the cannot it is in subdivided, atom of the same aspect are alike, and atoms sign up with to type molecules |
| nucleus | made increase of protons and also neutrons |
| -1 | charge of one electron |
| no electrical charge | an atom that has the same variety of protons and electrons |
| Bohr's model | electrons behave choose planets orbiting the sun |
| chemical bonds | force that hold different atoms or ions together |
| mixture | substance that retains its own properties |
| compound | substance that always contans the same facets in the same propeortion |
| solid | molecules have actually the strongest attractions come one another in this state the matter |
| ionic bond | forms in between ions with opposite charges |
| covalent bonds | forms between nonmetal atoms |
| reactant | a substance the undergoes a adjust in a chemical reaction |
| Atoms are rearranged | this is what wake up to atom in a chemistry reaction |
| exothermic reaction | energy form the reactants room transferred come the surroundings |
| chemical energy | present within atoms and molecules |
| chemical equation | balanced by transforming or adding subscripts |
| balanced chemistry equation | the total mass that the products = the full mass that the reactants |
| heterogeneous mixture | a mixture that is uniform throughout |
| suspension | a mixture that seperates into different layers |
| distillation | can be offered to separate solutions of miscible liquids if the liquids have actually diff. Boil points |
| solubility | grams that solute every 100g that solvent |
| average speed | distance travel by an item divided by the time |
| 0 km/hr | speed of an object at rest |
| direction | difference in between speed and velocity |
| J , N.m , kg.m2/s2 | units because that work |
| W=F x d | equation because that work |
| watts, horsepower, na djoules per second | units because that power |
| machine | can multiply and adjust the direction of an imput force |
| scissors | an example of a link machine |
| lever | an example of a straightforward machine |
| 1 | MA that a solitary fixed pulley |
| inclined plane | changes both the magnitude and also the direction the the force |
| Universe | only one is well-known to exist |
| 4.3 irradiate years away | the street of the closestly stars to the earth |
| shape | galaxies room clasified according to their... |
| young stars | spiral galaxies often appear bluish early to an abundance of these |
| old stars | elliptical galaxies often show up reddish because of the diversity of these |
| spiral galaxy | our galaxy is classified as one of these |
| super clusters | clusters of galaxies can type larger teams called |
| Hubble | he first proposed the the cosmos is expanding |
| red shift | this suggests that the unverse is expanding |
| big bang theory | states the the universe started with an explosion 10 to 20 billion year ago |
| Stars | produce their own light, radiate warmth energy, and radiate electromagnetic waves |
| A usual star | the sun |
| gravitational forces | these forces hold stars together |
| Helium atoms | In stars, energy is produced when H atoms incorporate to form these |
| fusion reactions | energy is released in stars as a result of these kind of reactions |
| Nuclear fusion | a star is born as soon as this happens in a stars core |
| supergiat stars | they form supernovas |
