The _______ properties of matter can be _______ or _______ without changing (39) the composition of the matter. We can describe the _______ and _______ by (40) looking and feeling the sample, we can detect an _______ by smelling, and we (41) can use a thermometer to measure the _______ and _______ points.

Question

(42) The _______ properties of matter are determined by the matter’s ability to (43) combine with or change into one or more different _______. The _______ of a (44) substance is how likely it is to react or have a chemical change. If the matter will (45) catch fire easily then it is considered _______. Another chemical trait is if the (46) chemical is poisonous, or its _______.
(47) A physical change is a change of the state of _______ or form, but it remains the (48) _______ substance. Ice, _______, and steam are all H2O even though one is a (49) _______, one a liquid, and one a _______.
(50) A chemical change cannot be undone, it is _______. During a chemical change it (51) becomes a _______ substance. Forms of evidence of a chemical change include (52) a release of _______, _______ absorbed or generated (substances gets colder or (53) hotter), or a change of_______.

Answer 1

The physical properties of matter can be observed or measured without changing the composition of the matter. We can describe the appearance and texture by looking and feeling the sample, we can detect an odor by smelling, and we can use a thermometer to measure the melting and boiling points.

The chemical properties of matter are determined by the matter's ability to combine with or change into one or more different substances. The reactivity of a substance is how likely it is to react or have a chemical change. If the matter will catch fire easily then it is considered flammable. Another chemical trait is if the chemical is poisonous, or its toxicity.

A physical change is a change of the state of matter or form, but it remains the same substance. Ice, water, and steam are all H2O even though one is a solid, one a liquid, and one a gas.

A chemical change cannot be undone, it is irreversible. During a chemical change it becomes a different substance. Forms of evidence of a chemical change include a release of gas, heat absorbed or generated (substances gets colder or hotter), or a change of color.