PASS Vocab Science

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amphibian
A cold-blooded animal with a backbone and smooth. wet skin. It usually grows into an adult in water, and then spends part of its life on land.
astronomy
The study of stars, planets, and outer space.
atmosphere
The air that surrounds a planet.
backbone
A set of bones that runs down the middle of the back; also called the spine.
carnivore
An animal that eats moslty other animals.
circuit
A path through which an electric current can flow.
climate
The usual weather in a place.
cold-blooded
Having a body temperature that changes based on the temperature of the environment.
condensation
The process by which a gas turns into a liquid.
conduct
To allow energy, such as electricity or heat, to pass through.
conifer
A tree that forms seeds inside cones.
ecosystem
A group of plants and animals, along with their environment. The members of an ecosystem depend on one another.
electric current
Electricity flowing through a circuit. When you turn on a light, an electric current flows to the light bulb and lights it up.
electromagnet
A temporary magnet formed when electricity flows through a coil of wire.
endangered
At risk of becoming extinct because t here are few left. Certain types of whales and bears are endangered.
energy
A supply or source of power. Plants use energy from the sun to make food.
environment
The natural world, where people, animals, and plants live.
evaporation
The process by which a liquid turns into a gas.
extinct
No longer existing. Dinosaurs used to roam the earth, but now they are extinct.
food chain
The order in which one living thing eats another. In the food chain, worms and insects eat plants. Then birds eat the worms and the insects.
force
The push or pull on an object caused by another object.
fruit
The part of a plant that forms around a seed.
galaxy
A very large group of stars and planets. We live in the Milky Way galaxy.
hypothesis
A prediction, or guess, about how an experiment will turn out.
instinct
Behavior that is natural, not learned. A mother bear's instinct is to protect her cubs.
magnet
A piece of metal that attracts iron steel towards it.
mammal
A warm-blooded animal with a backbone and hair or fur on its skin. The female gives birth to live young and produces milk to feed her babies.
meteor
A large piece of rock from outer space that burns up as it travels through Earth's atmosphere.
microscope
A tool that makes very small things look bigger, so that they can be viewed and studied.
migrate
To move from one place to another. During the winter, many birds migrate to warmer places.
moon phases
The shapes of the moon, as it is seen from Earth throughout each month. The new moon, half moon, and full moon are moon phases.
moss
A small, fuzzy green plant that grows on damp soil, rocks, or tree trunks. Mosses do not have roots or flowers. They have spores instead of seeds.
orbit
To travel around the sun or a planet. The Earth orbits the sun. The moon orbits the Earth.
organism
A living thing. All plants and animals are organisms.
planet
A large heavenly body that orbits, or travels around, the sun.
precipitation
Water that falls from clouds in the form of rain, sleet, snow, or hail.
predator
An animal that hunts other animals for food.
prey
An animal that is hunted by other animals.
reflect
To throw back light or sound.
refract
To bend or change the direction of light or sound.
reptile
A cold-blooded animal with a backbone and scales that cover its body. Reptiles creep along the ground or crawl on short legs.
revolve
To move on a path around a point. The moon revolves around the earth.
satellite
A heavenly body that orbits, or travels around, a planet. An object that orbits the Earth. The moon is a satellite of Earth.
seed
The part of a plant from which a new plant can grow.
telescope
A tool that makes things that are far away seem closer and larger.
temperature
The measure of how hot or cold something is.
thermometer
A tool that measures temperature.
tsunami
A huge wave caused by an underwater earthquake.
warm-blooded
Having a body temperature that stays the same regardless of the outside temperature. Mammals and birds are warm-blooded animals.
water cycle
The path that water follows, from evaporation, to condensation, to precipitation.
water vapor
Water that is in the form of a gas. When water evaporates, it turns into water vapor.
adaptation
A physical change, or change in behavior, that helps tan organism live in its environment.
arthropod
An invertebrate with a hard outer skeleton, three or more pairs of legs that bend, and a body made up of segments. Spiders, centipedes, and lobsters are arthropods.
camouflage
The ability of an animals to hide itself by blending into its surroundings.
circuit breaker
A switch that automatically cuts off the electric current in a circuit when the current gets too high.
cirrus cloud
A white, feathery cloud made up of tiny ice crystals.
cold front
An area in which a cold mass moves toward a warm air mass. The cold air pushes up the warm air.
conduction
The transfer of heat or electricity from one substance to another.
conductor
A substance that allows energy, such as heat or electricity, to pass through it.
cumulus cloud
A puffy white cloud that looks like cotton.
electrode
A point through which an electric current can flow in and out.
fern
A plant that has spores instead of seeds, and does not have flowers.
hydroelectricity
Electricity produced by moving water.
insulator
A substance that does not allow energy, such as heat or electricity, to pass through it.
invertebrate
An animal that does not have a backbone, or spine. Jellyfish, butterflies, and crabs are invertebrates.
meteorologist
A scientist who studies weather.
natural resources
Something found in nature that is useful to people, such as wood, water, or oil.
nimbus cloud
A dark, gray rain cloud.
parallel circuit
A circuit that has more than one path along which an electric current can travel.
prism
A solid figure that seperates light into the spectrum, or rainbow, of colors.
rain gauge
An instrument used to measure how much precipitation has fallen.
reflection
The bouncing of light waves off of a surface, or the image that appears in a mirror or other reflecting surface.
rotate
To spin around a fixed point.
series circuit
A circuit that has only one path along which an electric current can travel.
species
The smallest category into which organisms are classified, or grouped. Members of a species have the same traits and can reproduce more of their own kind.
spore
A plant cell produced by non-flowering plants, such as ferns or mosses, that can grow into a new plant.
static electricity
An electric charge that stays on an object.
stratus cloud
A gray or white cloud that forms in layers and spreads across the sky.
translucent
Letting some light through.
transparent
Letting light through so that objects on either side can be seen clearly.
visible spectrum
The range of light waves that people can see.
weather vane
An instrument that tells the direction in which the wind is blowing.
white light
Light that is a mixture of all the colors of the rainbow, even though it looks colorless. Sunlight is an example of white light.
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