Chemical vs Physical Changes Quiz

True (A)

A chemical reaction involving oxygen that forms a new product.

<p>combustion</p> Signup and view all the answers

<p>Melting ice = Physical change Rusting of iron = Chemical change Cooking an egg = Chemical change Crushing a can = Physical change</p> Signup and view all the answers

<p>Melting ice (A)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>Physical properties can be observed without changing the substance, while chemical properties describe a substance's ability to undergo chemical reactions.</p> Signup and view all the answers

<p>cooked</p> Signup and view all the answers

<p>Melting Point = Ice to water Flammability = Burning of gasoline Solubility = Salt dissolving in water Tendency to Rust = Iron exposed to moisture</p> Signup and view all the answers

<p>A fuel reacts with oxygen, producing heat and light energy. (C)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>Air/Oxygen, Fuel, Heat</p> Signup and view all the answers

<p>carbon dioxide, water</p> Signup and view all the answers

<p>Hydrogen = Combines with oxygen to form water Carbon = Combines with oxygen to form carbon dioxide Oxygen = Supports the combustion process Heat = Initiates the combustion reaction</p> Signup and view all the answers

<p>Heating (C)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>Rust is the oxide formed when iron reacts with moisture and oxygen.</p> Signup and view all the answers

<p>mass</p> Signup and view all the answers

<p>Color = The visual perception of an object Melting Point = The temperature at which a solid becomes a liquid Solubility = The ability of a substance to dissolve in another substance Magnetic Response = The tendency of a material to attract or repel magnets</p> Signup and view all the answers

<p>Cooking Pot (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>CaCO3</p> Signup and view all the answers

<p>car engines</p> Signup and view all the answers

<p>Flammability = Describes how a substance burns Acidity = Describes the pH level of a substance Electrical Conductivity = Ability to conduct electricity Solubility = Ability of a substance to dissolve in a solvent</p> Signup and view all the answers

<p>Iron oxide (A)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>Oxygen and water</p> Signup and view all the answers

<p>electroplating</p> Signup and view all the answers

<p>Rusting = Reddish-brown compound formation Tarnishing = Loss of shiny surface Electroplating = Protective coating Corrosion = Chemical attack on metal surface</p> Signup and view all the answers

<p>Silver (A)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>The paint acts as a barrier to oxygen and moisture.</p> Signup and view all the answers

<p>Flammability (B)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>Atoms and molecules</p> Signup and view all the answers

<p>calcium carbonate</p> Signup and view all the answers

<p>Natural Gas = Highly flammable Plastic = Not suitable for acetone Chromium coating = Resists corrosion Metals = High melting and boiling points</p> Signup and view all the answers

<p>Sulfur (D)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>It damages natural resources, including stonework and vegetation.</p> Signup and view all the answers

<p>carbon, hydrogen</p> Signup and view all the answers

<p>Carbon Dioxide = Burning fossil fuels Methane = Cattle waste Nitrous Oxide = Agricultural fertilizers Fluorinated gases = Industrial processes</p> Signup and view all the answers

A change in the form or appearance of a substance without a change in its chemical composition.

A change that results in the formation of one or more new substances.

A chemical reaction that releases energy in the form of heat and light, usually involving oxygen.

A characteristic of a substance that can be observed or measured without changing its chemical composition.

A property of matter that describes a substance's ability to undergo a chemical change, forming a new substance.

A change in the physical state of a substance without forming a new substance.Example - Ice melting

A change that forms a new substance with different properties than the original substance. Example - Burning wood

A chemical reaction that involves oxygen and forms a new product. Example: Rusting

A chemical reaction where fuels react with oxygen to produce heat and light. Produces carbon dioxide, water, smoke etc.

A change that cannot be easily reversed. Cooking an egg, or burning toast, are examples of irreversible changes, because the molecules of the substances have re-arranged into new molecules.

A chemical reaction where a substance combines with oxygen to form an oxide.

Burning, or the rapid chemical reaction of a fuel with oxygen, producing heat and light.

A diagram showing the three elements needed for a fire: fuel, oxygen, and heat.

A substance that can be burned to produce heat and light energy.

A type of fuel containing the elements carbon and hydrogen.

Stopping metals from reacting with air and water to avoid rusting and tarnishing.

A reddish-brown coating formed when iron reacts with oxygen and water.

Protected from corrosion, because the paint creates a barrier to keep air and water from the metal.

A characteristic of a substance that can be observed without changing its chemical makeup, like color, texture, or melting point.

Anything that takes up space and has mass.

Corrosion of iron. Iron combines with oxygen and water forming iron oxide (rust).

Corrosion of other metals like copper or silver. Oxidation weakens the metal surface.

Chemical reactions between a metal and its environment (air, water, acids).

Protective coatings like paint or electroplating to prevent metal from interacting with elements.

Coating a metal with a less reactive metal to prevent corrosion.

Air (oxygen) and water are needed for iron to rust

Metals reacting with chemicals in the air (specifically oxygen).

Anything that has mass and takes up space.

Metals easily transfer heat.

Certain chemicals can dissolve plastic.

Metals often have very high melting and boiling points.

Agricultural lime increases the pH of acidic solutions.

Chemical properties describe how a substance acts in reactions.

How a substance acts during a chemical reaction; it's not directly seen but needs a change to be observed

A characteristic observed without changing the substance's makeup. Example: colour, melting point

Agricultural lime (calcium carbonate) makes soil less acidic.

A substance's ability to burn.

Matter is made up of atoms and molecules.

Acid rain contains substances like sulfur and nitrogen, which react with water in the atmosphere to form acidic compounds.

Increased carbon dioxide levels trap heat from the sun, leading to a rise in Earth's temperature.

Hydrocarbons are chemical compounds made only of carbon and hydrogen.

Methane, a greenhouse gas, comes from sources like swamps, cattle, and rice fields.

Greenhouse gases, like carbon dioxide and methane, trap heat in the atmosphere.