Unless acted on by a force, objects in motion tend to stay in motion and objects at rest remain at rest. This is the principal of: inertia It's harder to push a real truck than a toy truck because objects with more mass have: more inertia Which will light a bulb, an open or closed circuit? A closed circuit If your string of holiday lights goes dark when one little bulb burns out, the string of lights is a: series circuit This circuit has more than one pathway for the flow of electrical current. If one bulb burns the others will remain lit. It is a: Parallel circuit Electrical energy moves easily through materials that are: conductors. Wires are usual made from ____ because it conducts electricity well. metal (often copper) Material like rubber, plastic and wood do not conduct electricity well. They are: insulators This is a dry-cell battery. Common dry-cells usually have low: voltage (1.5v or 9v) Magnets attract these metals: iron cobalt, nickel The iron filings in this picture show ________created by a magnetic lines of force Magnetism and _______ are very closely related. electricity An electric current creates a magnetic field, and a magnetic field creates an _________ . electric current If you wrap wire around a nail and run electricity through the wire, you have created an: Electromagnets are useful because they can be turned on an off. electromagnet If you rub your feet on the carpet, or rub a balloon on a wool sweater, you may create: static electricity Static electricity occurs when negatively charged _____ are rubbed off of one surface and on to another. electrons Benjamin Franklin learned that lightning was a form of electricity. What kind of electricity? static electricity Thomas Edison Which plant part takes in water and nutrients? the root Which part supports the plant and allows the movement of water and nutrients? the stem Which plant part makes food for the plant? the leaves
All of the living and nonliving things in an environment make up: an ecosystem Everything in an ecosystem depends on everything else. Humans often destroy ecosystems by: polluting ponds, chopping down forests, etc. The specific place an organism has in the food web is the organism's: niche The niche of every organism is different, and an organism's niche changes as it grows. A niche is the organism's role in the community, and includes: what it does, what it eats, and what eats it. All organisms have _________ that allow it to survive in its environment. adaptations Structural adaptations are __________ that help an organism survive, like long beaks, webbed feet, camouflage. body parts Behavioral adaptations are things that organisms do to survive. Examples of behavioral adaptations are: migration, hibernation, instincts, etc The measure of the amount of heat energy in the atmosphere is: temperature The amount of moisture in the air is: humidity The weight of the air causes: air pressure Air circulates around the Earth in big chunks called: air masses The boundary between two air masses is called a: front A warm front occurs when a warm air mass pushes out a cold mass. A warm front usually brings: steady rain or drizzle followed by warmer temperatures. A cold front occurs when a cold air mass pushes out a warm air mass. A cold front usually brings: a short period of heavy rain or thunder, followed by clear colder weather. A falling barometer often means: rainy weather ahead. 106. What kind of brings stormy weather, thunderstorms, and sometimes even tornadoes? Cumulonimbus Puffy white clouds that look like cotton balls are: cumulus clouds High, thin, wispy clouds are: cirrus clouds Which cloud forms a gray blanket over the sky, often bringing steady rain or drizzle? stratus cloud This instrument measures air pressure is a: barometer This instrument measures wind speed: anemometer