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Science Vocabulary - 3rd Grade
Review of 3rd Grade Science vocabulary terms.
Terms in this set (125)
Rock that was once melted, but has hardened and cooled.
Rock that is made of bits of broken down rock, dirt, sediment, and other debris and squeezed into layers.
Rock that has been changed by heat and pressure over a long period of time.
The process by which rocks break apart, change and turn into a different rock over millions of years.
A type of soil that has the smallest grain size and holds water very well. It can be very sticky and is found near water or wet areas.
A type of soil that has a medium grain size and can be powder-like. May be found near water.
A type of soil that has a large grain size and can be very rough to the touch. Water flows easily and quickly through this soil.
A type of soil that is usually very dark in color; contains decaying parts of dead plants and animals; is very good for plants.
the energy of moving particles of matter
a tool that is used to measure temperature.
a material through which heat moves easily.
a material through which heat does not move easily.
the process of changing from a gas to a liquid by cooling. to get smaller.
the process of changing from a liquid to a gas by adding heat.
the process of changing from a solid to liquid by adding heat.
to change from a liquid to a gas.
matter that has no definite shape or volume.
matter that has a definite shape and volume.
matter that a definite volume, but not shape. It takes the shape of the container.
the measure of the pull of gravity on an object.
state of matter
a form of matter that is a solid, liquid, or a gas.
a measure of how much matter is in an object.
a measure of how much space an object takes up. How loud or soft a sound is.
how high or low a sound is.
to move back and forth quickly.
a force that occurs when one object rubs against another object.
a push or a pull.
an object with a magnetic force. Magnets attract or repel certain metals.
a change in position of an object.
how fast an object moves over a certain distance.
the amount of space between two objects or places.
the location of an object.
a pulling force between two objects.
a tool used to measure mass or weight of objects.
a system of measurement based on the power of 10.
any characteristic of matter that you can observe.
the process though which gas changes into a liquid by cooling down.
water in a gas form.
the process through which liquid changes into a gas by heating up.
the measure of how hot or cold something is.
water that falls to the ground from the atmosphere.
the deepest layer and hottest layer of the Earth.
the outermost layer of the Earth where we live.
the layer of the Earth that is below the crust.
a solid, non-living substance found in nature.
a non-living material made of one or more minerals.
the dropping off of weathered and broken down rock.
melted rock that is below Earth's surface.
melted rock that is on Earth's surface after erupting from a volcano.
tiny bits of weathered rock or once-living animals and plants.
a large sheet of ice that moves slowly over the land.
the movement of weathered rock to another place.
the breaking down of rocks into smaller pieces.
the rapid movement of rocks and soil down a hill or mountain.
a mountain that builds up around an opening in Earth's crust from which lava flows onto the land.
a sudden, rapid movement of Earth's crust.
a feature of land on Earth's surface.
a very large area of land on Earth.
a resource that cannot be replaced or reused easily.
energy from the Sun.
a material that is burned for energy.
a resource that can be replaced or used again and again.
a material on Earth that is necessary or useful to people.
a body structure or a behavior that helps a living thing survive in its environment.
a behavioral adaptation where an animal moves to another place in search of what it needs.
a behavioral adaptation where an animal sleeps through the cold winter.
a behavioral adaptation in which an animal is active during the night and rests during the day.
a physical structure that some animals use to take in oxygen from the air.
a vertebrate that has hair or fur, is born alive, is warm-blooded, and feeds it's young milk.
a vertebrate that is cold-blooded, lays soft eggs, lives under water, breathes with gills and is covered with scales.
a vertebrate that is cold-blooded, lays hard eggs, breathes with lungs, and is covered in dry, scaly skin.
a vertebrate that is cold-blooded, lays soft eggs, lives in water when it is young and lives on land as an adult, has soft, moist skin.
a vertebrate that is warm-blooded, lays hard eggs, has two legs and a beak, can fly and is covered in feathers.
a hard outer covering, or shell, that holds up and protects an invertebrate's body.
an animal with a backbone or spine.
an animal that does not have a backbone or spine.
a structure that animals use to take in oxygen from water.
a physical adaptation that allows an organism to blend into its surroundings.
a very dry habitat that receives less than 10 inches of precipitation each year. It has very little plant and animal life. It can have a hot or cold climate.
the pattern of weather at a certain place over a long time.
the living and non-living things that share an environment and interact.
the struggle among organisms for water, food, nutrients, or other needs.
all the living things in one place that interact.
the process through which plants make food using water, sunlight and carbon dioxide.
an ecosystem where water covers the soil for most of the year.
a living thing - either a plant or an animal.
to make more of one's kind - plants make seeds and animals have babies.
all the living and non-living things that surround an organism.
a place where an animal can stay safe.
the home of a living thing or organism.
all the stages in an organism's life - birth, growth, and death.
the stage in some insects' life cycles before becoming an adult. The cocoon or chrysalis stage.
the second stage in some insects' life cycle which comes after hatching from an egg.
the first stage in the life cycle of a fish, reptile, amphibian, and a bird. The structure that protects and feeds some very young animals.
a series of changes in which an organism's body changes form.
several food chains that are interconnected.
an organism that breaks down dead plant and animal material.
a series of organisms that depend upon one another for food - including producers and consumers.
a large body of salt water.
an animal that eats plants or other animals.
an organism - plant - that makes its own food.
a physical adaptation in which one kind of organism imitates the traits of another in color or shape.
a substance that living things need to grow and stay healthy.
the basic building block that makes up all living things.
to react to something or a stimulus.
substances in the environment that help an organism survive.
a plant structure where seeds are made in some nonflowering, conifer plants.
the plant structure that holds a plant upright and carries water from the roots to the rest of the plant.
a young organism that is just beginning to grow.
the plant structure that takes in water and nutrients from the soil and holds a plant in the ground.
a mixture of minerals, weathered rocks, and decayed plant and animal matter.
the plant structure that takes in carbon dioxide and releases oxygen and is responsible for making food for the plant.
the plant structure that is usually bright colored and scented to attract insects for pollination. It also makes seeds for the plant.
the plant structure that grows around and protects seeds.
the plant structure that can grow into a new plant.
died out, leaving no more of that type of organism alive.
the trace or remains of something that lived long ago.
having very few of a kind of organism left - close to becoming extinct.
when there is an unusual lack of rain or dry period in an area for a long time.
heavy rains and water flowing over land that is usually dry.
when pollen moves from one flower to another, after which a seed can form.
an ecosystem or habitat with many trees.
a form of thermal energy that moves from a hot object to a cold object.
to change from a liquid to a solid by removing heat.
anything that has volume, mass, and takes up space.
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