BY BRENDA AND ELENA

SOLIDSTHEY HAVE A DEFINITE SHAPE AND A

DEFINITE VOLUME BECAUSE THEY TAKE UP THE SAME SPACE.

LIQUIDSLIQUIDS DON`T HAVE A DEFINITE SHAPE

BECAUSE THEY ADAPT TO THE CONTAINER THERE ARE IN, BUT THEY HAVE A DEFINITE VOLUME BECAUSE THEY ALWAYS TAKE UP THE SAME SPACE.

GASESGASES don`thave a definite shape

because they adapt to the shape of the container they are in and they don`t have a definite volume because they spand to fill the container they are in.

CHANGES IN MATTERPHYSICAL CHANGES CAN HAPPEN WHEN

MATTER CHANGE STATE AND SHAPE ,BUT THE SUBTANCE DOESN`T CHANGE. PHYSICAL CHANGES CAN HAPPEN WHEN WE HEAT, FREEZE,BEND,TWIST,STRETCH OR SQUASH A SUBSTANCE.

CHEMICAL CHANGESA CHEMICAL CHANGE IS WHEN A NEW

SUBSTANCE IS PRODUCED.CHEMICAL CHANGES CAN HAPPEN WHEN

WE BURN A SUBTANCE OR EXPOSE A SUBTANCE TO AIR.

MIXTURESA MIXTURE IS SOMETHING THAT

CONTAINS TWO OR MORE SUBTANCES.AIR IS A MIXTURE OF GASES.SALTWATER IN THE SEA IS A MIXTURE OF WATER,SALT AND OTHER MINERALS.MANY ROCKS ARE A MIXTURE OF DIFFERENT MINERALS.

HETEROGENOUSIN A HETEROGENEOUS MIXTURE IT IS

EASY TO SEE THE DIFERENTS SUBSTANCES.

HOMOGENEOUS IN A HOMOGENEOUS MIXTURE IT IS

DIFFICULT TO SEE THE DIFERENT SUBTANCES.