Describing Matter
Solid, liquid, and gas are the three __________ of matter.
states
Water, ammonia, and carbon dioxide are all compounds?
True
T/F: On another planet, the force of gravity will be more if the planet is more massive than Earth and less if the planet is less massive than Earth.
True
Which of the following is a physical change? Freezing, burning, rusting, or oxidation
freezing
In a Carbon Dioxide Molecule, how many oxygen atoms are there?
2 oxygen atoms
Basic particle from which all elements are made
Atoms
What is the chemical formula for Ammonia?
NH3
What system do scientists use to measure the properties of matter?
International System of Units
Suppose you leave a small puddle of liquid on the kitchen floor. When you come back hours later, it is gone. What happened? Is this a physical or chemical change?
Physical change; the liquid water changed into water vapor (a gas) and mixed with the air drying it up.
A ___________ change releases energy.
Exothermic
A substance that cannot be broken down into any other substances by chemical or physical means.
Element
chemical bonds
A suitcase had a length of 62.3cm, a width of 45cm, and a height of 27cm. Calculate the volume.
75,694.5cm3
Yesterday during our lab we saw the vinegar and baking soda react with one another. What was one substance that was created?
Carbon Dioxide
__________ energy naturally flows from warmer matter to cooler matter.
Thermal
What is made of more than 100 different substances called elements?
matter
T/F: Guacamole, ketchup, and salad dressing are all examples of homogeneous mixtures.
False, they heterogenous mixtures because you can see the different parts and they can easily be separated out.
27.06 or 27.1 g/cm3
The energy stored in the chemical bonds between atoms is a form of energy called what?
Chemical energy
Another term for the ability to burn
Flammability
The study of matter and the changes in matter
Chemistry
What are the four methods used to separate mixtures?
distillation, evaporation, filtration, and magnetic attraction
T/F: An object's weight is less on the moon than on Earth. On the moon, the object's mass decreases.
False; remains the same
The fact that matter is not created or destroyed in any chemical or physical change.
The Law of Conservation of Mass
The ratio of hydrogen atoms to sulfur atoms in sulfuric acid, H2SO4.
2 to 1