mass

Human beings in a group, for example in a country

Ordinary people in a society who are not rich or powerful

People who are not rich or powerful

A large group of ordinary people in a society

People in a society who are not rich or powerful

Ordinary people who richer, more powerful people often talk about in a rude way

A small group of the most powerful or rich people in a society

A social group with the most money and power

Great damage to a wide area often caused by war or a big disaster

A thing that can kill or injure many people, like nuclear, chemical and biological devices

Killing many people on purpose at the same time or in a short time

A person who kills many people at one time

A way to send information to many people, like TV or radio

Enough people or support for something to start and keep going

Many people feel strong fear and act in a panicked, irrational way

Making large numbers of the same product on an assembly line

A large area of land that is not separated by water

A number that shows if a person's weight is healthy for their height

A lab test that finds which chemicals are in a sample

A set of shared ideas, styles, and entertainment spread by TV and the internet

Point in an object where we think its mass is concentrated for balance and movement

A machine that measures the masses of charged particles from a sample

A large area of air with about the same temperature, humidity, and pressure

Energy an object has because of its mass, as in E = mc²

A number that tells how heavy one atom of an element is in atomic mass units

A large public gathering where people meet to support or protest a cause

The smallest amount of nuclear material needed to start and keep a chain reaction

A solemn Catholic church service with full ceremony, music, and incense

A large area of ice that forms part of a glacier or ice sheet

A priest leads a short Roman Catholic church service with little or no singing

An object with mass but no size used to make physics problems easier

A word that names something you cannot count and usually has no plural form

The amount of matter in an object measured when it is not moving, not how heavy it feels

A measure of how hard it is to change an object's motion when a force pushes it

A card sent to someone who lost a loved one saying a Mass will be said for them

The total number of protons and neutrons in an atom's nucleus

A computer attack that can damage systems and harm many people

The total mass in a system that does not gain or lose matter stays the same over time

A unit used to measure how heavy something is, like a gram or kilogram

A graph that shows how many charged particles have each mass

The mass a moving object seems to have as its speed gets near the speed of light

A method that measures the mass of tiny charged particles

A system of underground or above ground trains that carries many people quickly

Large areas of the brain work together for complex tasks

The speed of a chemical reaction depends on the amounts of the substances that react

The idea that mass can turn into energy and energy can turn into mass

A small unit for mass used to measure atoms and molecules

Matter stays the same in a closed system

A large public discussion with many people about important issues

A measure of how strongly an object pulls other objects by gravity

A machine that separates tiny charged parts of atoms by mass and shows them on a graph

The mass of an atom compared with one twelfth of a carbon-12 atom

A mass with no size that physicists treat as if at a single point

A formal church service with set ceremonies and a serious mood

The mass difference between a nucleus inside an atom and the total mass of its protons and neutrons

Amount of mass missing when protons and neutrons join and release energy

A theory that large areas of the brain work together for complex tasks

The mass of all the atoms in one molecule compared with one twelfth of a carbon-12 atom