| A | B |
|---|
| Troposphere | Layer of the atmosphere we live in |
| Nitrogen | Makes up most of the atmosphere |
| Thermometer | Measures temperature |
| Electronic scale | Measures mass |
| Density | Mass divided by volume |
| Speed | Distance divided by time |
| Force | Mass times acceleration |
| Inertia | Newton's 1st law of motion |
| Gravity | Force that pulls all things towards center of Earth |
| Friction | Force between two objects touching |
| Cell | Smallest unit of living things |
| 5 | Number of kingdoms |
| Animal | Kingdom we belong to |
| 7 | Classification groups |
| Homo Sapiens | Scientific name for humans |
| Circulatory system | System that delivers oxygen and nutrients to our bodies |
| Digestive system | System that breaks down food |
| Respiratory system | System that combines oxygen with food to get energy |
| 28000 | 2.8 x 10 4th power |
| Control | Part of an experiment that doesn't participate |
| Metals | Good conductors of heat/elec., high MP and BP |
| Nonmetals | Poor conductors, low MP and BP |
| Metalloids | Have properties of metals and nonmetals |
| Atom | Smallest part of an element that still has its properties |
| Molecule | Smallest part of compound |
| Positive | Charge on a proton |
| Negative | Charge on an electron |
| Neutral | Charge on a neutron |
| Sugars and oxygen | Two things produced by photosynthesis |
| Chlorophyll | Chemical that allows plants to create their own food |
| Cell walls and chlorophyll | 2 things plant cells have that animal cells don't |
| Water cycle | Evaporation, condensation, precipitation |
| Sexual reproduction | Reproduction involving sperm and eggs |
| Asexual reproduction | Reproduction involving only one parent |
| White | All colors of visible spectrum |
| Black | Absence of color |
| Conduction, convection, radiation | 3 types of heat transfer |
| Electromagnetic spectrum | Radio, microwave, infrared, visible light, UV, X-rays, gamma rays |
| Igneous, metamorphic, sedimentary | 3 types of rocks |
| Moon | This orbits the Earth |
| Sun | The Earth orbits this |
| 24 hours | One Earth rotation |
| 365.24 days | One Earth revolution |
| Rotation=revolution | Why we only see one side of the moon |
| Mercury | Closest planet to the sun |
| Jupiter | Largest planet |
| Venus | Planet closest in size to Earth |
| Milky Way Galaxy | Our galaxy |
| Tilt of the Earth's axis | Why we have seasons on Earth |
| Asteroid belt | Found between Mars and Jupiter |
