Late KHATIJA College of education Subject - ICT Topic – Generate Test Guided by Dr. Sufiya ma’am Submitted by Shaikh Bilqis Md. Gayasuddin Roll No – 75/M SY B.Ed.
Some Criteria for the Classification of Matter • Properties • State (solid, liquid, gas) • Composition
Properties • Physical: observed without without changing the composition of the substance. • Chemical: the ability of a substance to undergo a specific chemical change
Examples of Physical Properties • Color, odor, hardness, density, melting point, boiling point, state, solubility.
States of Matter • Solid • fixed shape and volume, incompressible • Liquid • fixed volume, takes the shape of its container • Gas • takes the volume and shape of its container
Change of Phase Melting solid liquid Condensation gas liquid Freezing liquid solid Evaporation liquid gas Sublimation solid gas Boiling: Evaporation occurring beneath the liquid’s surface.
(Pure) Substance • Matter that has a uniform and definite composition. • Elements • Compounds
Mixture: a physical blend of two or more substances that are not chemically combined. • Homogeneous • Heterogeneous
Homogeneous mixture (solution) • Uniform composition throughout. • One phase. A homogeneous mixture of: -Iron (Fe) -Chromium (Cr) -Nickel (Ni)
Heterogeneous Mixtures Example: Oil and vinegar • Non-uniform composition throughout the mixture • Two or more phases.
Elements • The simplest substances. • Can not be separated into simpler substances. • Building blocks of all matter. • More than 100 known elements. • Represented by chemical symbols.
Examples: • Americium, Am • Einsteinium, Es • Bromine, Br • Helium, He • Lead(Plumbum), Pb • Niobium, Nb • Iron (Ferrum), Fe • Mendelevium, Md
Compound • A substance that contains two or more elements chemically combined. • Compounds have different properties from the individual substances. (Ex: H2O)
Substance or mixture? • If composition is fixed and may not changesubstance
Chemical Properties • The ability of a substance to transform into a new substance (to undergo a chemical change). • Example: Magnesium reacts with oxygen to form magnesiumoxide.
Physical Changes • Physical change: a change in the physical properties of a substance. • Composition does not change. • May be reversible or irreversible. • Examples: Reversible: Irreversible:
Chemical Change • A change that produces matter with a different composition than the original matter. • Atoms rearrange themselves into new combinations.
Start Test Q1 – A type of matter composed of only one kind of substance A - compoundB - Element C -Mixture
Q2 – Which of the following has lusture? A - Salt B - Glass C -Gold
Q3 – Arsenic , Silicon and selenium are example of? A - Metals B - Metalloids C – Non - Metals
Q4 – When two or more metals and non-metals are fused then it is an ? A - Mixture B - Alloy C – Compound
Q5 – Material that do not conduct electricity ? A - Copper B - Paper C – Water
Q6 – Liquids that are soluble in water ? A - Oil B – Lemon juice C – Honey
Q7 – Which of the following is an insulator? A - Metals B – Woods C – Glass
Q8 – Wooden objects are? A - Transparent B – Translucent C – Opaque
Q9 – Which of the following is not a characteristic feature of a gas? A – Definite shape B – Particles closely packed C – All of them
Q10 – A mixture which is not uniformly mixed throughout is called ? A – Suspension B – Colloids C – Heterogeneous