Science Vocab
The amount of space that an object takes up
Volume
What is the formula to calculate density?
density = mass / volume
What unit is mass usually measured in?
grams or kilograms
This type of change occurs when a substance changes from one state to another, such as from liquid to gas.
Phase Change or Physical Change
A characteristic of a substance that can be observed and measured
Property
The ratio of mass to volume (how much mass is packed into a certain volume)
Density
A block of wood has a mass of 200 grams and a volume of 100 cm³. What is its density?
What is 2 g/cm³? (Density = 200 g ÷ 100 cm³)
Objects that are more dense than water will __________ when placed in water.
Sink
The production of gas bubbles, a change in color, or the release of energy can indicate a __________.
Chemical Reaction
This property describes whether a substance can dissolve in another substance
Solubility
Signs that show a new substance has been made
Indicators of a chemical reaction
If a substance has a density of 1.5 g/cm³, and you have a 10 cm³ sample, what is its mass?
What is 15 grams? (Mass = Density × Volume)
If I have two liquids in a beaker sitting in layers, which one is denser?
The bottom liquid
When you dissolve salt in water, is it a physical or chemical change?
Physical Change
A substance that is made during a chemical reaction
Product
A starting substance in a chemical reaction that gets used up as it changes into a new substance
Reactant
If a box has a length of 4 cm, a width of 3 cm, and a height of 5 cm, what is its volume?
What is 60 cm³? (Volume = 4 cm × 3 cm × 5 cm)
What is the tool most commonly used to measure the volume of a liquid (you used this in the lab)
Graduated Cylinder
When a substance undergoes a change that does not alter its chemical identity, it is called a __________ change.
Physical Change
Bonus Question: This doesn't have to do with vocab (surprise!) - Which state of matter is the most dense?
Solid
A solid that is formed from mixing two liquid substances together
Precipitate
If an object with a mass of 10 grams displaces 5 cm³ of water, what is its density?
What is 2 g/cm³? (Density = Mass ÷ Volume)
This term refers to the upward force exerted by a liquid on an object that is placed in it (how something is able to float)
Buoyancy
A change that is irreversible is what type of change?
Chemical Change
A substance made of two or more elements that are chemically bonded together.
Compound