Something that is not (or never used to be) a living thing. Rocks, rain, and metals are all examples of things that are abiotic. In looking for evidence of possible life elsewhere in the universe (like Mars), scientists need to figure out if what they are analyzing comes from something abiotic or biotic.
related words: biotic
word roots: a = not, bio = life
Non-living parts of an ecosystem. This can include things like rocks or chemicals that could somehow affect the living things in an ecosystem. For example, if a landslide blocks a river from flowing, scientists would then be studying the changes that occur to the animals and plants that are no longer living in a river ecosystem, but a lake ecosystem.
related words: biotic factors absorb
word roots: ab = from, sorb = suck in
To take in or soak up. When you use a sponge to clean up a wet mess, the sponge will absorb liquid.
related words: absorbent ammonia
A really smelly gas made from nitrogen and hydrogen. You can smell ammonia in urine. Ammonia can build up in fish tanks if you don't change the water often. Fish pee too!
word root: atomos = cannot be divided up A very small, basic part of matter.
Something that is (or used to be) a living thing. Plants, animals, and bacteria are all examples of things that are biotic. In looking for evidence of possible life elsewhere in the universe (like Mars), scientists need to figure out if what they are analyzing comes from something abiotic or biotic.
related words: abiotic
word roots: bio = life
Living parts of an ecosystem. This can include things like plants, animals, and bacteria that are found in an ecosystem. In ecosystems, scientists study how these living things affect each other (like predator-prey relationships).
A way of measuring temperature, using the metric system. Water freezes at 0°C, and boils at 100°C.
word roots: centi = hundred, meter = measurement
A metric unit used for measuring smaller distances. It is about as long as your pinky finger is wide. There are 100 centimeters in a meter.
Saying that something is true without providing evidence or proof. A good experiment should be able to test a claim to see if it is true or not.
conservation of matter
A limitation. For example, plastic put on the soil in strawberry fields must be thick enough to keep weeds from growing through, and dark enough to heat the soil and kill unwanted bacteria. However, the plastic cannot make the soil so hot that the strawberry plants cannot grow. For scientists, constraints help to focus experiments upon a particular goal.
word roots: crite = judging
Rules or expectations that are used to decide if something meets or fails certain requirements. For example, drone inventors have to meet the criteria of designing flying machines that are both strong and lightweight. For scientists, criteria help to focus experiments upon a particular goal.
word roots: kilo = thousand, gramma= small weight A metric unit used for measuring larger masses. It is about as heavy as a textbook. There are 1000 grams in a kilogram.
word roots: kilo = thousand, meter = measurementA metric unit used for measuring larger distances. It is about as long as the distance you can walk in 15 minutes, or 3 times around a PE running track. There are 1000 meters in a kilometer.
The amount of stuff (matter) that something has. We can think of this as weight (which measures how much something can be pulled on by Earth's gravity).
word roots: mater = mother, materia = wood or substance
Something that takes up space and has mass. Matter makes up everything in the universe.
word root: meter = measure
A metric unit used for measuring distances. It is about as long as a doorway is wide.
word roots: milli = tiny thousands, gramma= small weight A metric unit used for measuring tiny masses. It is about as heavy as a single grain of sand. There are 1000 milligrams in a gram.
word roots: milli = tiny thousands A metric unit used for measuring tiny volumes of liquid or gas. It is about as much liquid as a single drop of water. There are 1000 milliliters in a liter.
word roots: milli = tiny thousands, meter = measurementA metric unit used for measuring tiny distances. It is about as long as a dime is thick or a pencil mark is wide. There are 10 millimeters in a centimeter, and 1000 millimeters in a meter.
One or more atoms stuck together. The atoms can be the same type or different types.