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Energy Science Test
| Question | Answer |
|---|---|
| List the types of energy | electrical energy, heat energy, kinetic, potential, and chemical |
| What are two ways that we can distinguish between different forms of energy? | With our body (touch, seeing, hearing) and where they come from |
| What is temperature measured with? | a thermometer |
| Sound energy is detected using what? | our ears |
| Solar energy comes from what? | the sun |
| Geothermal energy comes from what? | within the Earth |
| Identify one way that we can distinguish between light energy and sound energy. | Using our sight and ears |
| What is the difference between a qualitative and a quantitative measurement of heat? | Qualitative measurement is a description such as 'that is very hot.' On the other hand quantitative measurement is an exact number such as 99.9 degrees Celsius. |
| How many joules make up 1 MJ? | 1 million |
| How many joules make up 4.2 kJ? | 4.2 x 1000 = 4200 |
| Convert 5000 kcal to calories. | 5000 x 1000 = 5 000 000 |
| Convert 5000 kcal to kJ. | 5000 x 4.2 = 21 000 |
| What is renewable energy? | A resource that is unlikely to disappear or run out over time. |
| What is non-renewable energy? | A resource that cannot be replaced. |
| Name three fossil fuels. Why are they called non-renewable resources? | Oil, natural gas, and coal. They are non-renewable, because they cannot be replaced for a few thousand years. |
| Why are people encouraged to use their cars less and turn off lights when they are not in use? | So that they can use less energy, resulting in a better environment. Also, they can save money, because gas and electricity cost. |
| What is primary energy? | Primary energy is the total amount of energy available to us from a basic resource. |
| What is energy transfer? | Energy transfer is movement of one form of energy from place to place without change. |
| Give me an example of energy transfer. | the sun going through space and reaching earth (radiation) |
| What are the three ways that heat is transferred? | Conduction, Convection, and Radiation |
| What is conduction? | Energy transfer through solid objects |
| What is Convection? | energy transfer by fluid movement or current. |
| What is radiation? | Energy transfer across space. |
| What is the Law of Conservation of Energy? | A law which states that energy cannot be created or destroyed, but may be changed from one form to another. |
| When does the greatest heat transfer from the inside of a house to the outside occur? | When there is the most difference in temperature |
| Why does primary energy often become heat? | So that we can cook our food, warm our houses and make steam to drive turbines and engines. |
| How does a burning biscuit release energy as heat? | When a biscuit (mostly carbs) is burned in the air, the oxygen in the air combines with the chemicals in the biscuit to form new compounds. The new substance requires less energy to stick together. The extra energy is let out creating heat. |
| If a 50 kg person needs 5 MJ of energy to keep their body temperature at 37 degrees C, how much would be needed by a person of (a) 100 kg (b) 60 kg (c) 40 kg. List two factors that might affect the energy needs that you just calculated. | (a) 10 MJ (b) 6 MJ (c) 4 MJ How active one might be and if they are in puberty or not. |
| What is geothermal energy? | the energy sourced from the heat of the Earth's molten core |
| How is geothermal energy related to thermophiles? | It powers the thermophile communities of living organisms, which do not need sunlight to power their living processes. |
| Why are humans solar-powered animals? | Because we eat plants that use the sun to grow, and we eat animals that eat plants that use the sun to grow. |
| Is kilowatt hour a unit of power or energy? Explain | power, because it is made up of joules and watts. |
| What is an audiometer? | a measuring device for sound energy |
| what is bagasse? | fuel produced from plants after all juices have been extracted |
| What is the Big Bang Theory? | an idea that the universe started out of energy that exploded, causing particles to form, in the process of which space and time began |
| What is biofuel? | primary energy from plant or animal products |
| what is biomass? | fuel material from living processes |
| What is a calorie? | unit of energy equal to 4.2 J |
| What is chemical energy? | energy released from chemical reactions. |
| What is form of energy? | the way energy transfers and transformations are recognised; a form of energy is recognised by the way it is experienced or measured or by its origin |
| what is fuel? | chemical source of energy |
| what is fossil fuel? | The remains of once-living organisms that formed over thousand of years into coal, oil and natural gas |
| What is heat energy? | form of energy measured by skin or thermometer |
| What is an insulator? | a material that does not let heat pass through easily |
| What is a convection current? | a large-scale movement of a fluid as a result of heating |
| What is an ecosystem? | a basic unit of ecology. An ecosystem has an input, a set of processes and output (as waste heat). |
| What is energy transformation? | one type of energy changing into another form |
| What is an environment? | a place where energy is collected, used, stored and released |
| What is a joule (J) | the basic unit of energy |
| What is a kilowatt hour (kWh) | unit of energy equal to 3.6 MJ |
| What is kinetic energy? | Energy of movement |
| What is light energy? | a form of energy measured by eyes or photometer |
| What is a photometer | a measuring device for light energy |
| What is power? | energy delivered in a given amount of time |
| What is a Sonometer? | a measuring device for sound energy. |
| What is sound energy? | a form of energy measured by ears or a sonometer |
| What is a thermogram? | photograph using heat radiation |
| What is a thermophile? | a living thing that uses heat, not sunlight, for its living processes |
| What is a watt (W) | a unit of power equal to one joule of energy delivered each second 1 W = 1 J/s |
Created by:
kaylee72sommers
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