Physical/Chemical Changes Ls. 4-6

In addition to physical properties, substances have ___________ that describe how a substance reacts with other substances.

• chemical properties

• chemical equations

• indicators

• identities

If particles collide with enough _______, the bonds between the atoms can break. The atoms can rearrange and form new bonds.

• energy

• sunlight

• lava

• fire

Tags

NGSS.MS-PS1-2

The substances present before a chemical change happens are _________.

• reactants

• products

• symbols

• bonds

Tags

NGSS.MS-PS1-5

A chemical _________ tells at a glance the reactants, the products, and the proportions of each substance present in a chemical reaction.

• change

• equation

• symbol

• bond

The substances present after a chemical change are __________.

• reactants

• products

• symbols

• equations

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

When charcoal burns, new chemical bonds between carbon and _______ atoms can form.

• hydrogen

• oxygen

• helium

• sodium

Tags

NGSS.MS-PS1-2

During a chemical reaction, chemical bonds can ________ and atoms rearrange to form new substances.

• break

• multiply

• melt

• freeze

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Scientists can use ________ to represent the chemical names of substances.

• chemical formulas

• chemical changes

• reactants

• products

When atoms attach to other atoms, the forces that hold these atoms together are called _________.

• chemical bonds

• chemical equations

• chemical formulas

• chemical changes

Another term for chemical change is ____________.

• chemical bond

• chemical equation

• chemical formula

• chemical reaction

Tags

NGSS.MS-PS1-2