Matter and Energy

the number written to the right and slightly below an element in a chemical formula; represents the number of atoms of an element present in a chemical formula

• Subscript

• Reactant

• Product

when temperature differences cause liquids and gases (fluids) to expand and move; the less dense areas continually rise, and the more dense areas continually sink creating a cyclical current

• Convection current

• Atmosphere

• Anemometer

Tags

NGSS.MS-ESS2-6

equipment, such as goggles and gloves, used for protection in an investigation

• Personal protective equipment (PPE)

• Patterns

• Ethical practices

use of evidence to construct testable explanations and predictions of natural phenomena, as well as the knowledge generated through this process

• Science

• Properties

• Personal protective equipment (PPE)

Tags

NGSS.MS-LS1-5

smallest particle of an element that maintains the properties of that element

• Atom

• System

• Science

Tags

NGSS.MS-PS1-1

average mass number of all atoms of an element (from particles in the nucleus)

• Atomic mass

• Atom

• System

the number of protons in the nucleus of an atom; used to determine an element's position in the Periodic Table

• Atomic number

• Atomic mass

• Atom

a characteristic of a substance that describes how it combines with other substances to form new ones

• Chemical property

• Atomic number

• Atomic mass

a property of a subatomic particle; positive (protons), negative (electrons), or neutral (neutrons)

• Electrical charge

• Chemical property

• Atomic number

a pure substance that cannot be broken down chemically into simpler substances

• Element

• Electron cloud

• Electron