Students explore the concept that chemical reactions involve the breaking of bonds between atoms in the reactants, and the rearrangement and rebonding of these atoms to make the products. Students ...

The speed of a chemical reaction is affected by temperature, concentration, particle size and the presence of a catalyst. It can be calculated by measuring changes in reactants/products.

Can be used to recap on tritation or could lead into a classroom discussion on chemical changes and structures.

The lesson can also be used to lay a foundation for learning about changes in state and chemical changes which can be further developed in later grades. If water is cooled enough it can change to ice.

When physical change occurs substances change their state ... water molecules themselves remains the same – one oxygen atom is chemically bonded to two hydrogen atoms. [INSERT CHEM_CI_01_ima] A ...

The White House announced a new executive order signed by President Trump on Tuesday to "protect[] children from chemical and surgical mutilation." ...

An effort is underway to convince Georgia’s Environmental Protection Division that changes to a chemical plant’s permit will worsen Augusta's air.