This is a change of matter from one form to another WITHOUT change in chemical properties.
What is a physical change?
100
This is a group of atoms that are held together by chemical forces. It is also the smallest unit of matter that can exist by itself and retain all of a substance's chemical properties.
What is a molecule?
100
This is a change that occurs when one or more substances change into entirely new substances with different properties.
What is a chemical change?
100
The temperature at which a liquid becomes a gas.
What is the boiling point?
100
A mixture where components are evenly distributed.
What is homogenous?
200
This is the capacity of a substance to combine chemically with another substance.
What is reactivity?
200
This is the smallest unit of an element that maintains the chemical properties of that element.
What is an atom?
200
This is a combination of two or more substances that are not chemically combined.
What is a mixture?
200
Flammability, non-flammability, and reactivity are all this.
What are chemical properties?
200
A mixture in which substances are not evenly distributed.
What is heterogeneous?
300
Anything that has mass and volume.
What is matter?
300
This is a substance that cannot be separated or broken down into simpler substances by chemical means.
What is an element?
300
The ratio of the mass of a substance to the volume of the substance.
What is density?
300
Why is Co an element and CO a compound?
Co is the element Cobalt and cannot be broken down into a simpler substance. CO is a compound of Carbon and Oxygen and can be broken down.
300
Solid, liquid, and gas are all this.
What are states of matter?
400
This is a substance made up of atoms of two or more different elements joined by chemical bonds.
What is a compound?
400
A sample of matter, either a single element or a single compound, that has definite chemical and physical properties.
What is a pure substance?
400
The temperature and pressure at which a solid becomes a liquid.
What is the melting point?
400
Can a physical change reverse a chemical change? Explain.
No. Atoms must rearrange to reverse a chemical change. Atoms do not rearrange in a physical change.
400
Give two clues that indicate a chemical change.
Production of gas bubbles, change in color, change in odor, release of light, sound, or heat.
500
Size, shape, color, mass, volume, density, boiling point, melting point, states, and odor are all this.
What are physical properties?
500
Find the Density of an object that has a mass of 1640 g and a volume of 240 cm^3.
What is 6.83 g/cm^3
500
Iron is much denser than a feather. Yet, a particular sample of feathers weighs more than a sample of iron. Explain how this is possible.
The feathers have more volume. That is,there is a greater sample of feathers than iron.
500
Find the Mass of a substance that has a Density of 3.4 g/cm^3 and a volume of 60 cm^3.
2040 g
500
Dissolving a substance is an example of this type of change.