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5th Gr Energy Test
Science
| What sorts of things can be a medium? | Matter (solids, liquids, gases) |
| How does sound travel? | Sound travels through a medium |
| How is sound made? | Sound is produced by vibrating objects |
| What is sound energy? | Sound waves (vibrating air) |
| What are some forms of energy? (Name 7) | Sound, Light, Heat (thermal), Chemical, Mechanical, Kinetic, Potential |
| Can energy be transferred? | Yes. Energy can be transferred from one form to another, |
| What is Energy? | The ability to cause motion or create change |
| Can sound travel through a vacuum? Why or why not? | No. A vacuum is an absence of matter |
| In sound energy what is pitch? | Pitch is how high or low a sound is. The more something vibrates in a specific amount of time, the higher the frequency of sound waves and the higher the pitch |
| In sound energy what is volume? | How loud or soft a sound is |
| In sound energy what is an echo? | Sound waves bouncing off of a hard surface |
| In which direction does light normally travel? | Light travels in a straight line - unless it strikes an object or it travels from one medium to another |
| Name 3 things that can happen to light when it strikes an object? | 1. Refracted (bends) when it goes from one transparent medium to another 2. Reflected (bounces back) when it hits an object 3. Absorbed (light that hits an object & is absorbed turns into heat the rest is reflected-this is what allows us to see colors) |
| What happens when light hits a prism? | Light is refracted (bent) |
| What happens when light hits a mirror? | Light is reflected (bounces back) |
| Does a black or white shirt keep us cooler in the summer? Why? | A white shirt because it reflects every color on the spectrum. A black shirt absorbs all of the colors of light (holds heat) |
| What is electricity? | The movement of electrons that can produce light, heat and sound |
| What is an electron and where would you find one? | Negatively charged particles in an atom |
| What is static electricity? | A negative charge jumps to a positive charge |
| How is heat energy measured? | With thermometers |
| What is mechanical energy? | Any energy that has the ability to do work |
| What is kinetic energy? | The energy of movement (rolling ball, light, sound) |
| What is potential energy? | Stored energy (water held in a tank, a ball at the top of a hill) |
| What is thermal energy? | Energy that tranfers forms (states) gives off heat |
| What can heat (or its absence) do to matter? | It can cause it to change states |
| What happens when heat is removed from gases? | Gases turn to liquids (steam to water) |
| What happens when heat is removed from liquids? | Liquids turn to solids (water to ice cubes) |
| What happens when heat is added to solids? | Solids turn to liquids (melt - ice cubes to water) |
| What happens when heat is added to liquids? | Liquids turn to gas (steam) |
| What happens to light when it hits a blacktop (pavement)? | Light is absorbed (and turns into heat) |
| Is energy matter? | Energy is NOT matter; it is not a solid, liquid, or gas (which all have mass) |
| What often happens when energy is transferred from 1 form to another? | Energy releases heat |
| Sound travels travels through a medium. Give an example of a medium. | A medium can be any form of matter (solids, liquids, gases) |
| T/F The higher the frequency of sound waves, the higher the pitch | T |
| Give an example of an insulator | Rubber, plastic, wood, glass |
| Give an example of a conductor | Water, metal, air |
| Are humans conductors or insulators? | Conductors |
| T/F Every magnet has 2 poles | True |
| Name the poles of a magnet | North and South |
| Same poles repel or attract? | Repel |
| South facing North poles repel or attract? | Attract |
| What materials are magnetic? | Only iron, nickel or cobalt (or any material made with these ingedients like steel) |
| Is steel magnetic? | Yes |
| What happens to an electromagnet when electricity is turned off? | It is no longer magnetic - the magnetism stops |
| What is an electromagnet? | An object that becomes a magnet when electricity passes through it |
| What shape do wires in an electromagnetic circuit need to be? | Coiled (around an iron core) |
| What does an electrical circuit need for an electric current to flow? | A complete unbroken loop of conductors with a power source |
Created by:
jackiejohnsonskills
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