Science Test 1

Suspension

A mixture in which the particles of a substance are mixed throughout but are large enough to settle

Colloid

A mixture in which the particles of a substance are dispersed throughout and are not large enough to settle

Physics

The study of matter, energy, motion, and forces

Chemistry

The study of how atoms, molecules, and chemical interact with each other

Atom

The smallest unit into which an element can be divided and still maintain its properties

Molecule

The smallest unit into which an element can be divided and still maintain its properties

Heterogeneous Mixture

A combination of substances in which the particles are not uniformly distributed

Matter

Anything that has mass and takes up space

Mixture

A combination of two or more substances that are not chemically combined

Tyndall EffectB

The scattering of light by colloids

Benefits of Physics

medicines, machinery, better foods, those are transportation, and more rapid communication methods

Drawbacks of Physical Science

Air and water pollution, radioactive waste, and other harmful environmental effects

Benefits of Chemistry

Plastics, pesticides, fuels, fabrics, paper, fertilizers, rubber, allies, and drugs

Characteristics of Suspensions

• Can block light

• Can be separated using filtration

• Particles are large enough to settle

Examples of Suspensions

• Salad dressing

• Clay and water

• Paint

• Flour and water 

• Liquid antibiotics

• Sunscreen 

• Red blood cells

Characteristics of Compounds

Two or more atoms chemically combined in a fixed proportion

Examples of Compounds

• Water (H₂O)

• Hydrogen peroxide ( H₂O₂)

• Salt (NaCl)

Characteristics of Homogeneous Mixtures

Properties and appearance are the same throughout

Examples of Homogeneous Mixtures

• Sugar in hot water

• Gold jewelry

Chromatography

A method of separating mixtures according to how the different components are absorbed

Distillation

A method of separating a liquid mixture by heating it so the liquid evaporates and condenses

Filtration

The use of paper or other materials to remove solid particles from a liquid mixture

Matter Breakdown