Glossary results for "P"

an unpleasant feeling that we get when something is wrong with our body

a medication that is used to reduce or relieve pain

the study of life that existed on Earth before the present

a chemical element with the symbol Pd and atomic number 46

a device that uses air resistance to slow the descent of an object through the atmosphere

an organism that lives in or on another organism, called the host, and gets its food from the host

the biological or adoptive adults who raise children

a very small piece of matter

a pattern is a regular or repeated sequence of events or objects

to enter or pass through a surface or substance

an optical instrument that uses a system of mirrors or prisms to reflect light around an obstacle and allow the observer to see objects that would otherwise be hidden

a series of rhythmic muscle contractions that move food through the digestive tract

the ability of a material to allow fluids to pass through it

lines that intersect at a right angle

chemicals that are used to control pests

an animal that lives with people and is not forced to work or eaten

a modified leaf that is part of a flower

a shallow, round dish with a lid that is used to grow microorganisms in a controlled environment

a measure of how acidic or basic a substance is

any observable event or occurrence

a type of tissue in plants that transports food from the leaves to the rest of the plant

a chemical compound that contains phosphorus and oxygen

a chemical element with the symbol P and atomic number 15

the process by which plants use sunlight to make food

a change in the physical properties of a substance, but not in its chemical composition

a branch of science that deals with the physical properties of matter and energy

the process by which rocks and minerals are broken down into smaller pieces by physical forces

the study of matter

the study of the functions of living organisms

a substance that gives colour to other materials

a tool used to transfer small amounts of liquid

the highness or lowness of a sound

a group of mammals that have a placenta

tiny organisms that live in the water

living things that make their own food using sunlight

a sticky film that forms on teeth

the fourth state of matter, after solid, liquid, and gas

a synthetic material made from polymers

small, round blood cells that are essential for blood clotting

a chemical element with the symbol Pt and atomic number 78

a chemical element with the symbol Pu and atomic number 94

the two ends of a magnet

a fine powder produced by plants

the transfer of pollen grains from the male anthers of a flower to the female stigma

an animal that helps to transfer pollen from the male anthers of a flower to the female stigma

anything that makes our environment dirty or unhealthy

a chemical element with the symbol Po and atomic number 84

a synthetic fibre that is made from repeating units of a chemical called terephthalic acid

a large molecule made up of repeating units of smaller molecules called monomers

a small, shallow body of water that is surrounded by land

a chemical element with the symbol K and atomic number 19

a member of the nightshade family, which also includes tomatoes, eggplants, and peppers

energy that is stored in an object because of its position or condition

the rate at which work is done

a chemical element with the symbol Pr and atomic number 59

a solid that forms when two liquids are mixed together

food that has been cooked before it is packaged and sold

an animal that hunts and eats other animals

a statement about what you think will happen in the future

a female animal is carrying a fetus inside her body

the force pushing on an object per unit area

a mammal that has a large brain, forward-facing eyes, and opposable thumbs

a scientist who studies primates

food that has been changed in some way from its natural state

an organism that makes its own food

a rare chemical element with the symbol Pm and atomic number 61

to spread or grow

to move forward or to cause something to move forward

the characteristics of something

a rare chemical element with the symbol Pa and atomic number 91

large molecules made up of amino acids

tiny particles that are found in the nucleus of an atom

tiny, single-celled organisms that live in water, soil, and the bodies of other organisms

a period of rapid physical and emotional changes that occurs during adolescence

a force that makes an object move towards something else

a simple machine that uses a wheel and a rope to change the direction of a force

the rhythmic beat you can feel in your arteries

the third stage in the life cycle of an insect that undergoes complete metamorphosis

the black circle in the center of your eye

made up of only one type of substance

a force that moves an object away from something else