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Bell Ringer 9/19 & 9/20 – pg. 16

Bell Ringer 9/19 & 9/20 – pg. 16. PLEASE DATE BELL WORK!!!

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Bell Ringer 9/19 & 9/20 – pg. 16

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  1. Bell Ringer 9/19 & 9/20 – pg. 16 PLEASE DATE BELL WORK!!! SI is built upon seven metric units, known as __(1)__. In SI, the base unit for __(2)__, or the straight line distance between two points, is the __(3)__. The base unit for __(4)__, or the quantity of __(5)__ in an object or sample, is the __(6)__. ALL BAGS ON FLOOR PLEASE!!!

  2. Bell Ringer 9/21– pg. 19 PLEASE DATE BELL WORK!!! Another important quality in measurement is __(1)__. Accuracy is the closeness of a measurement to the actual __(2)__ or what is being measured. For example, suppose the digital clock is running 15 minutes slow. Although the __(3)__ would remain __(4)__ to the nearest second, the __(5)__ displayed would not be __(6)__. ALL BAGS ON FLOOR PLEASE!!!

  3. Bell Ringer -9/24 – pg. 47 PLEASE DATE BELL WORK!!! __(1)__ can be used to test the purity of a substance. Recall that density is the ratio of the __(2)__ of a substance to its __(3)__. At room temperature, silver has a density of 10.5 g/cm3. If a coin has a density of __(4)__ at room temperature , either the coin is not made from __(5)__ or the coin contains substances in addition to the silver. ALL BAGS ON FLOOR PLEASE!!!

  4. Bell Ringer - 9/25 – pg. 39 & 40 PLEASE DATE BELL WORK!!! Matter that always has the same __(1)__ is classified as a pure substance or simple a substance. An element is a __(2)__ that cannot be broken down into simpler pieces. An atom is the __(3)__ particle of an element. A compound is a substance that is made from two or more __(4)__ substance and can be broken down into those simpler substances. ALL BAGS ON FLOOR PLEASE!!!

  5. Bell Ringer – 9/26 & 9/27 PLEASE DATE BELL WORK!!! Peter is curious what type of candy is the densest. He decides to buy three types of candy to test and measures their volume and mass. • What is the IV in the experiment? • What is the DV? • What formula will he use to find the density of the candy? ALL BAGS ON FLOOR PLEASE!!!

  6. Bell Ringer 9/28 – pg. 39 & 40 PLEASE DATE BELL WORK!!! Every sample of a given substance has the same __(1)__ because a substance has a fixed, uniform __(2)__. Substances can be classified into two categories--__(3)__ and __(4)__. An element is a __(5)__ that cannot be broken down into simpler pieces. An atom is the __(6)__ particle of an element ALL BAGS ON FLOOR PLEASE!!!

  7. Bell Ringer 9/19 – pg. 40 PLEASE DATE BELL WORK!!! Water is classified as a __(1)__. A compound is a substance that is made from __(2)__ or more simpler substances and can be broken down into those simpler __(3)__. The simpler substances are either __(4)__ or compounds. The properties of a compound differ from those of substances from which it is made. For instance, hydrogen and __(5)__ are gases at room temperature, but water is a __(6)__. ALL BAGS ON FLOOR PLEASE!!!

  8. Bell Ringer 9/20 – pg. 41 PLEASE DATE BELL WORK!!! Mixtures tend to retain some of the __(1)__ of their individual substances. But the properties of a __(2)__ are less constant than the properties of a substance. The properties of a mixture can __(3)__ because the __(4)__ of a mixture is not __(5)__. ALL BAGS ON FLOOR PLEASE!!!

  9. Bell Ringer 9/21 & 9/22 – pg. 41 & 42 PLEASE DATE BELL WORK!!! Sand is an example of a __(1)__ mixture. Heterogeneous comes from the Greek words hetero and genus, meaning __(2)__ and kind. In a heterogeneous mixture, the parts of the __(3)__ are noticeably different. The water in a swimming pool is a __(4)__ mixture of water and substances that dissolve in water. In a homogeneous mixture, the substances are so evenly distributed that it is difficult to __(5)__ one substance in the mixture from another. ALL BAGS ON FLOOR PLEASE!!!

  10. Bell Ringer 9/23 – pg. 45 PLEASE DATE BELL WORK!!! A __(1)__ is any characteristic of a material that can be observed or measured without changing the __(2)__ of the substances in the material. __(3)__, conductivity, __(4)__, hardness, melting point, boiling point, and __(5)__ are examples of physical properties. ALL BAGS ON FLOOR PLEASE!!!

  11. Bell Ringer 9/26 – pg. 54 PLEASE DATE BELL WORK!!! As a candle burns, the __(1)__ combine with oxygen in the air to form water and __(2)__. The ability to burn is a __(3)__. A chemical property is any ability to produce a change in the __(4)__ or matter. Chemical properties can be observed only when the substances in a sample of __(5)__ are __(6)__. ALL BAGS ON FLOOR PLEASE!!!

  12. Bell Ringer – 10/7 – Need Calculator PLEASE DATE BELL WORK!!! • Calculate the density of a hunk of metal if the density is 4.0 g/ml and the volume is 44.2 ml? ALL BAGS ON FLOOR PLEASE!!!

  13. Bell Ringer - 9/30 – pg. 48 & 49 PLEASE DATE BELL WORK!!! • Properties determine which __(1)__ are chosen for which uses. For example, you wouldn’t want __(2)__ made from wood. Shoelaces must be __(3)__, that is, they must be able to bend without breaking. The must also be __(4)__, that is, they must be able to withstand repeated use. 5) On pg. 49, which materials are used to make the sculpture? ALL BAGS ON FLOOR PLEASE!!!

  14. Bell Ringer – 10/4 – pg. 56 PLEASE DATE BELL WORK!!! Figure 18 shows what happens to banana peels as bananas ripen. The __(1-two words)__ in a banana peel is caused by __(2-two words)__ taking place in the cells of the banana. A chemical change occurs when a substance __(3)__ and forms one or more __(4-two words)__. Chemical changes occur when a cake is baked, leaves on trees change color, and __(5-six words)__. ALL BAGS ON FLOOR PLEASE!!!

  15. Bell Ringer – 10/5 & 10/6 – pg. 58 PLEASE DATE BELL WORK!!! It is not always easy to distinguish a __(1)__ change from a physical change. Even if you observe a __(2)__ change, a __(3)__, or a precipitate, you cannot be sure that a chemical change has taken place. When the iron __(4)__ in the figure is heated, its color changes from __(5)__ to red. Despite this change in color, the __(6)__ is still iron. ALL BAGS ON FLOOR PLEASE!!!

  16. Bell Ringer – 9/30 PLEASE DATE BELL WORK!!! • Grab a scantron form from the front tables. • Write name on scantron. • For subject please write “Common Assessment #1”. • At the top please fill in your ID number (skipping the last two boxes) and fill in the appropriate bubbles. ALL BAGS ON FLOOR PLEASE!!!

  17. Bell Ringer – 10/30 – Need Calculator • Calculate the mass of a hunk of metal if the density is 4.0 g/ml and the volume is 44.2 ml? • When you are finished, please grab a clicker from the front.

  18. Bell Ringer – 10/10 – pg. 58 PLEASE DATE BELL WORK!!! Before you decide whether or not a __(1)__ change has occurred, ask yourself this question: Are different __(2)__ present after the change take place? If not, then the change is __(3)__, not __(4)__. When __(5)__ undergoes a chemical change , the composition of the matter __(6)__. When matter undergoes a physical change, the composition of the matter __(7)__ the same. ALL BAGS ON FLOOR PLEASE!!!

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