1. Compounds Study Guide 6 th Grade

2. Correct Your Study Guide 1.What are the building blocks of elements? Atoms 2.What are the building blocks of compounds? Molecules 3.What are compounds made of? More than 1 element 4.How are compounds formed? Through a chemical reaction 5.Which are essential for life? Compounds, Elements, or both? Both 6.Which are found on Earth? Compounds, Elements, or both? Both

3. 7.List the evidence that a chemical reaction has taken place. 1.Production of a gas 2.Change in temperature 3.Production of a precipitate (a solid) 4.Change in color

4. 8.How many elements are in the following chemical formula? CO2 2 9.List the elements that are in the following chemical formula. CO2 Carbon, Oxygen 10.How many atoms of each element are in the following chemical formula? CO2 Carbon = 1, Oxygen = 2 11.What is the name of the 2 in the following formula? CO2 subscript 12.Label the following as a compound or element: element O compound CO element Na element Fe element Co compound NaCl

5. 13.Describe what happened when we mixed the vinegar and baking soda in lab. A chemical reaction had produced a gas. 14.How did you know how to dispose of the chemicals we used in lab? The teacher will instruct you on how to safely dispose of chemicals in lab. 15.Label the following as a chemical or physical change: physical Paper tearing physical Kool-Aid dissolving in water physical Changes in state of matter chemical Silver tarnishing chemical Iron rusting chemical Leaves changing colors in the fall

6. 16.Iron (Fe) is solid metal. Oxygen(O) is a colorless gas. Both are elements. When they are mixed, a new red solid (Rust) is formed. What is occurring? A chemical reaction is taking place. The elements are combining to make a new substance. That new substance is a compund. 17.CO is carbon monoxide. CO 2 is carbon dioxide. Describe the similarities and differences between these two compounds. Carbon monoxide and carbon dioxide are both compounds. They are both made of the same two elements: carbon and oxygen. However, they do not have the same number of atoms in their molecules. Carbon monoxide only has 1 atom of oxygen. Carbon dioxide has 2 atoms of oxygen. 16.What is the best piece of equipment to measure an exact volume of water in our lab? Graduated Cylinder

7. Water Temperature A student heats a water sample and records its temperature at the end of every minute, as shown above. If this trend continues, what temperature in degrees Celsius will the student observe at the end of the eighth minute? 45 The student did not record the temperature for the third minute. By analyzing her data, what temperature was the water after 3 minutes had passed? 20 Time (min) Temperature (°C) 1 10 2 15 3 X 4 25 5 30