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Science Final Exam
| Question | Answer |
|---|---|
| What is the safety symbol for poisonous substance? | The skull head thingy |
| What is the best lab practice for unlabeled beakers? | Wait for teachers direction |
| Which tools do you use to measure the boiling point of a liquid? | Thermometer, Hot Plate, Beaker |
| Compare and contrast Chemical Change and Physical Change. | Same: A change occurs Chemical: Creates a new substance (ex.splitting of water into Hydrogen and Oxygen Gases) Physical Change: New substance is NOT created. (ex. change in shape size or stante of change) |
| True Or False:The properties of a new substance formed from the original substance are always the same as the properties of the original substance. | False |
| What is a hypothesis? | An educated guess |
| What is an independent variable? | Manipulated change (change on purpose) |
| Give an example of independent variable: | Type of gum youre chewing |
| If a density of a rock is 10g/ml and its mass is 2 g, What is its volume? | 0.2 ml |
| Density= | M/V mass divided by volume |
| True or False: The denser an object is the higher it will float in water. | False |
| Characteristics of metals, nonmetals, metalloids. | Metals:Luster,malleable,Good conductor Nonmetals: Dull, brittle, poor conducter Metalloids: Properties of both metals and nonmetals. |
| What is the symbol for Carbon Dioxide? | CO2 |
| What element makes up a large part of living matter? | Carbon |
| A burning candle releases ___ energy and ___ energy. | Light and Heat |
| 17. A car battery causing the headlights to shine is an example of ______ energy converting to _______________ energy. | Chemical To Electrical To Light |
| Define Convection, Conduction, Radiation | Convection: Fluid moving Conduction: Heat transferred through touch Radiation: EM Waves from heat or when you feel heat |
| Examples of convection, radiation, and conduction. | Convection: Heater in a room Radiation: Sun Conduction: Ironing clothes. |
| ______ energy form is most commonly used in households. | Electrical |
| A flashlight battery converts chemical energy to what 3 others? | Chemical to Electrical to Heat to Light |
| When molecules gain thermal energy, their potential / kinetic (circle one) energy increases. | Kinetic |
| Earthquakes are an example of ____ energy transforming into _____ energy | Potential to Kinetic |
| Energy is defined as the ability to ____________. | Do work or cause change. |
| Explain the energy conversions from the sun that provides energy to the grass through photosynthesis: | Light to Chemical |
| Kinetic or Potential: Boulder sitting at the top of a cliff | Potential |
| Kinetic or Potential: Water flowing through a hose | Kinetic |
| Kinetic or Potential: Book resting on a table | Potential |
| Kinetic or Potential: Car driving up a hill | Kinetic |
| A hand pencil sharpener uses ____ energy from you to move the sharpener which converts to _____ energy to sharpen the pencil. | Chemical to Mechanical |
| Solar Energy is a renewable energy source that would best be used in which geographical location? Dense Forest Dry Desert Near mouth of a river Near an ocean Base of a high mountain range | Dry Dessert |
| List one major Disadvantage of Nuclear Energy: | Radioactive Waste |
| List one major Advantage of using Biomass as a renewable energy source: | DECREASES WASTE PRODUCTS AND INEXPENSIVE!!!(know this) |
| Coal is ___________________ (Circle ALL that apply): Inexpensive Non-Polluting Abundant Renewable | Inexpensive and Abundant |
| True or False: ________________ One important factor to consider, when deciding to use solar or wind power as renewable energy source is, whether there is a backup system when there are cloudy days or no wind to power the turbines. | True |
| Things to do help your community in managing energy resources: (Circle ALL that apply): Recycle Aluminum/Glass/Plastic Carpool Ride your bike Support businesses that use reusable materials Walk | Recycle Aluminum/Glass/Plastic Carpool Ride your bike Support businesses that use reusable materials Walk |
| Geothermal energy is ____from underground that is used to make energy. Which is the best example of Geothermal Energy? (Circle ONE): Oil Coal Magma Solar Wind | Magma |
| Biomass is a renewable energy source that is burned to produce ________ energy and electricity. | Heat/Thermal |
| Solar energy is a Renewable / Nonrenewable (Circle one) resource. | Renewable |
Created by:
Niiickeyy
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