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Science T1, L3-T2L1
Study for the topic one Lesson 3 and topic 2 lesson 1 test
| Question | Answer |
|---|---|
| What is a physical change? | A physical change is something that changes the appearance of matter, but doesn't change the substance. |
| What are three examples of a physical change? | 1. Glass breaking 2. tearing paper into two pieces 3. When Ice melts |
| What is a chemical change? | It's a change in matter that creates a new substance. |
| What is another word/words for chemical change? | Chemical reaction. |
| What are 3 examples of chemical changes? | 1. When rust forms 2. When gasoline burns 3. When wood burns |
| True or false: Photosynthesis is a physical change. | False |
| What are some signs that a chemical change has occurred? | Change in color, formation of gas (bubbles), temperature change. |
| Define energy | The ability to cause change or do work. |
| All changes in matter require some kind of ________. | Energy. |
| The fact that matter is not created or destroyed is called the... | Law of conservation of mass. |
| This means that the mass does what after a physical or chemical change? | This means that the mass stays the same. |
| Temperature | The measure of the average kinetic energy of particles inside a substance. |
| What is kinetic energy? (A simple synonym for it) | motion |
| What is thermal energy? | The TOTAL Kinetic energy of all the particles in a substance. |
| How does thermal energy move? | From warm to cold. |
| Give an example of how Thermal energy works. | I'm are holding a piece of ice. It starts to melt in my hand. I'm moving the thermal energy from my hand (warm) to the ice cube. (cold). |
| Define Kinetic Energy... | Energy obtained through motion. |
| Question: Ice cube; 35 degrees C 1/2 cup of water; 35 degrees C || Which has more KE? | The 1/2 cup of water because it has more particles. |
| What are some examples of physical changes? | Melting, boiling, evaporation, baking. |
| What are some examples of when TE is released? | When something freezes, condensation forms, when fire works are shot off. |
| Define... Physical Change | Matter stays the same before and after the change. |
| Chemical change | Two or more substances combined to form different substances. |
| Physical property.. | Characteristics that can be observed without change. |
| Chemical Property.. | Describes an objects ability to change. |
| Examples of physical property | Luster, shape, size, smell, color, taste, the ability to desolve |
| Examples of Chemical property.. | The ability to rust, mold, burn, combust, and the ability to react. |
| Physical changes of state.. (Examples) | Melting; solid to liquid, evaporation; liquid to gas, freezing; liquid to solid, |
| Signs that a PHYSICAL change has occurred: | If the form or appearance has changed. |
| What are the four types of Chemical Changes? | Oxidation, tarnishing, objects catch fire, and bubbles are created/bubbling. |
Created by:
runner522
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