| A | B |
|---|
| atmosphere | the thick layer of air around the earth. |
| weather | the changing of the atmosphere |
| climate | what the weather is usually like in a particular place |
| meterologist | someone who studies and predicts the weather. |
| forecast | a weather prediction |
| wind | moving air |
| anemometer | used to measure the SPEED of the wind |
| weather vane | used to measure the DIRECTION of the wind |
| temperature | how hot or cold something is |
| thermometer | used to measure the temperature |
| cloud | made of tiny drops of water which form around bits of dust |
| fog | a clould that is close to the ground |
| smog | a mixture of fog and smoke |
| matter | anything that takes up space, can be one of three states |
| solid | a state of matter that has its own shape, can be picked up |
| liquid | a state of matter this is wet, takes the shape of the container and cannot be picked up |
| gas | a state of matter that floats away in the air, takes the shape of its container, and cannot be picked up |
| evaporation | when water is heated and becomes a gas |
| condensation | water droplets come together to form clouds |
| precipitation | when water droplets in the clouds get heavy and fall to the ground as rain, snow, sleet or hail |
| accumulation | water that collects on land surfaces in oceans, rivers, lakes or puddles |
| humidity | how much water vapor is in the air |
| rain | water falling from the clouds |
| flood | what is caused by too much rain |
| drought | what is caused by too little rain |
| snow | tiny ice crystals frozen in the air before it falls to earth |
| sleet | rain that is partly frozen |
| hail | frozen ice pellets falling from the sky |
| lightning | zigzag streak of light made from clouds charged with electricity |
| thunder | crashing in the sky of hot and cold air |
| thunderstorm | rain storm with thunder and lightning |
| hurricane | a storm that forms over the Atlantic Ocean with winds between 75 and 200 mph. They are named after people |
| Eye of the hurricane | the calm part in the middle of the storm |
| tropical storm | a storm like a hurrican but with winds less than 75 mph |
| typhoon | a hurricane in the Pacific Ocean |
| tornado | storm that forms a funnel of wind that may touch the ground |
| cyclone | any kind of wild, destructive windstorm. Typhoons, hurricanes, tornados and tropical storms are all cyclones |
| hibernation | the sleep-like behavoir of some animals, such as bears, to adjust to seasonal changes in temperature |
| migration | the movement of some animals, such as birds, to adjust to seasonal changes in temperature |
| camouflage | how some animals hide by matching their color to their surroundings |
| erosion | the wearing away of the soil by wind or water |
| seasons | the four times of the year marked by changes in daylight, air temperatures, and plants life. |
| spring | season after winter. days and nights almost equal, temperature rises, new plant life begins |
| summer | season after spring, days are long, nights are short, temperatures are warm or hot. |
| autumn | the season after summer, some trees lose their leaves, temperatures are cooler, days and nights almost equal |
| winter | the season after autumn, temperatures are cold, days are short and nights are long, plants rest from growing |
