The pull of gravity on the Earth is a direct result of what?
Mass of the Earth
How would the measure of a golf ball change if it were moved from the Earth to the moon?
It would have the same mass, different weight.
The measure of the force of gravity on an object
The measure of how much matter an object contains
The measurement of how much mass is contained in a given volume
How do you calculate density?
divide mass by volume
The density of ice is 0.9g/cm cubed. The density of water is 1.0 g/cm cubed. Which is more dense, water or ice?
The density of gasoline is 0.7g/cm cubed. If gasoline is poured into water will it sink or float?
the amount of space that a gas takes up is its what?
The volume of an irregular object can be measured how?
By submerging the object in water in a graduated cylinder.
Volumes of liquids are usually measured with a what?
A carefully measured amount of soil is placed in an oven and heated to burn off the organic material. Which tool is best used to measure the mass of the remaining soil?
Triple beam balance
Suppose 20 grams of liquid hydrogen peroxide is heated so it completely breaks down into liquid water and oxygen gas. Which best describes the total mass of the water and oxygen that were produced?
20 grams, because no matter is added or removed, just rearranged.
A candle is put on a triple beam balance and lit. As a candle burns, the the size of the candle decreases, but its mass does not change. What is demonstrated by this experiment?
The total mass of the system is constant.
In the lab a sealed container with 100 grams of steam is cooled until all the steam becomes a liquid. The container is then cooled further until all the water becomes a solid. Which remians a constant during these changes?
the mass of the water remains constant.
The Periodic Table is systematically organized according to what?
The structure of the atoms of the elements.
From an element's location in the periodic table, you can predict what?
If Sodium has an atomic number of 11, 11 protons, and 12 neutrons, what is The atomic mass number of sodium?
If Sodium has an atomic number of 11, 11 protons, and 12 neutrons, What is the total number of electrons in an atom of sodium?
If aluminum has 13 protons, what is its atomic number?
If magnesium has an atomic mass number of 24 and has 12 protons, How many neutrons are in an atom of magnesium?
If Phosphorus has an atomic mass number of 31 and 16 neutrons, How many protons are in an atom of phosphorus?
Draw a model for the compound phosphorus trichloride.
In an atom, the number of protons equals the number of what?
which parts of the atom move around the nucleus?
The elements that do not ordinarily form compunds are called what?
the noble gases
table sugar and table salt are examples of what?
Substances that cannot be broken down chemically into other substances are called what?
what is the smallest part of the element gold that can still be classified as gold?
H2O and CO2 are examples of chemical what?
Which of the folowing substances can be separated into several elements?
Nitrogen, zinc, air, or aluminum?
air- the others are already elements.
Soil, a salad, and sugar water are all examples of what?
Draw a diagram (example) of a pure substance
Lemonade consist of several substances that are NOT chemically combined, so lemonade is classified as a what?
Why might you need to study at least two or three characteristics before you can accurately identify a substance?
Many substances share characteristic properties
Boiling point is considered what type of property?
Dissolving salt in water is an example of what kind of change?
Gas burning, rust forming, and using electricity to break down water into hydrogen and oxygen are what type of changes?
If you describe methane as a gas that easily catches fire, what kind of property are you describing about methane?
The change from liquid to solid, or thr reverse of melting is called what?
An uncovered pot of soup is simmering on a stove and there are water droplets on the wall above the back of the stove. What has occured?
vaporization, then condensation
Rusting a car fender is an example of what kind of change?
What do you know about how the molecules in ice move compared to the molecules in water?
The molecules in water can move more freely that the molecules in ice because the molecules are more spread out in a liquid.
Draw a model demonstrating the Law of Conservation of Mass. (Matter is neither created or destroyed- just rearranged).
Read and measure the volume of a liquid in a graduated cylinder.
Aluminum's atomic number is 13 and phosphorus's atomic number is 15. If Silicon comes between them on the periodic table, would you be able to tell its atomic number? What else could you tell about silicon, based on this information?
Yes, and its atomic number would be 14. You could also tell the number of protons and electrons based on that information.