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Grade 9 Science

Matter & Mass Set 3

The ability of a substance to change into a new substance a chemical property.
How a substance interacts with other substances , such as acids, or how it reacts to heat or light is referring to chemical properties
Anything that takes up space and has mass is matter.
A process in which a chemical change occurs is called a chemical reaction.
A measure of the amount of matter in an object is mass
A form of matter suh as a solid, liquid or gas is the state of matter
A measure of the amount of matter in an object. For Metric, measured in grams. mass
A chemical changes always results in the formation of a new substance or substances.
A measure of the amount of space an object takes up. For Metric, measured in in liters or cubic meters. volume
A universal system of measurement based on using multiples of 10. metric
the Metric unit of measurement for mass gram
The Metric unit of measurement for volume liter
The Metric unit of measurement for distance Meter
The Metric unit of measurement for temperature Celsius
A form of matter that has a definite shape and volume. The particles in this matter have a low amount of energy. solid
A chemical reaction is a process in which chemical change occurs.
What is matter? Anything that takes up space.
What are the three states of matter? Solid, liquid and gas.
What is physical change? Reversible phase changes
What are the 3 'clues' that a physical change has taken place? dissolving, phase change, reversible.
What is a chemical change? A change in the original substance as it reacts with another substance
What are the 5 'clues' that a chemical change has taken place? 1, Odour. 2. Gas produced. 3. Colour change. 4. Heat/light change. 5. Precipitate
What are these descriptions an example of: ice melting, cutting carrots, breaking glass, mixing salt and paper. A Physical Change
What are these descriptions an example of: baking a cake, a fire burning, a firecracker exploding, a car rusting. A Chemical change
The physical property of hardness can be described as the ability to be scratched
The physical property of malleability can be described as the ability to be hammered into thin sheets.
The physical property of solubility can be described as the ability to dissolve.
The physical property of melting or boiling point can be described as temperature that phase change occurs.
List the 5 points of the Particle Theory of Matter. 1. All matter is made of tiny particles 2. All particles of one substance are the same. 3. Different substances are made of different particles. 4. Particles are always moving. 5. There are attractive forces between particles.
When testing for hydrogen gas, a flaming splint will pop.
A chemical reaction is a process in which what happens? A chemical change occurs.
When is the only time chemical properties can be observed? When a chemical change occurs.
If you mix baking soda and vinegar, you will produce a chemical change that involves the formation of gas bubbles.
Evidence of chemical chamge can include a great variety of changes which include (name 2) colour, odour, temperature, the production of light, the formation of a new solid inside a liquid or the production of a new gas.
Absorbs heat during reaction, combustible, forms gas when heated, reacts with acid all describe chemical properties
Forms a precipitate (solid) in a solution, emits light during reaction, emits heat during reaction, reacts with water all describe chemical properties
Chemicals made from corn have been used to make items to support a sustainable environment. Corn is put through a chemical change called fermentation.
Once corn has been put through a chemical change called fermentation new substances are developed. Name 2 of these recovered, purified, made into solvents, biodegradable plastics and automobile fuel.
Solvents are substances that dissolve other substances.
An advantage of corn-based biodegradable plastics is they can be broken down by bacteria.
A product that is flexible, heat resistant and strong and that children play with all the time is polyethylene plastic.
Polyethylene plastic is considered safe to use as food containers.
The types of polyethylene plastic that break down more easily when exposed to sunlight are known as photodegradable.
What is the main difference between a pure substance and a mixture? Pure substance: Matter that has the same composition and properties throughout is called a substance. Mixture: It is the combination of two or more pure substances where each substance retains its own identity.
What is chemical change? A chemical change is a process where one or more substances are altered into one or more new and different substances.
Explain the difference between cohesion and adhesion. 'Hesion' means to stick. They describe a state of molecules sticking together. Cohesion occurs between the same kind of substance, whereas adhesion occurs between different kinds of substances.
How can the application of heat result in a chemical change? adding heat to a substance might produce a new gas, resulting in a chemical change such as when baking powder is heated it produces carbon dioxide gas.