Term
| How does electromagnetic energy travel? |
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Definition
| It travels through a space as waves. |
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Term
| What is an example of a heterogeneous mixture? |
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Definition
| A mixture where you can easily see the individual parts. Examples would be: a salad, vegetable soup, pizza. |
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Term
| Which energy is called "the energy of matter in motion?" |
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Definition
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Term
| TRUE/FALSE? Burning is a physical change. |
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Definition
| This is ABSOLUTELY false!! When something is burned, the original substance is changed and unrecognizable. |
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Term
| TRUE/FALSE? A stretched rubber band is an example of potential energy. |
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Definition
| This is TRUE. The rubber band has the potential to snap. At the moment it is just storing that energy. |
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Term
| What is the force that holds atoms together? |
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Definition
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Term
| TRUE/FALSE? Elements are the simplest substances. |
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Definition
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Term
| TRUE/FALSE? Thermal energy flows from warmer objects to cooler objects. |
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Definition
| TRUE! This is why we stand near a camp fire to get warm. The heat moves from the burning logs to warm us. |
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Term
| TRUE/FALSE? Weight does not change in different places. |
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Definition
| FALSE! Weight is relative to where you are. |
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Term
| TRUE/FALSE? In a physical change, matter changes into a new kind of matter. |
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Definition
| FALSE. A physical change just change how it looks. (Like grass being cut into smaller pieces) |
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Term
| TRUE/FALSE? Table sugar and table salt are pure substances. |
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Definition
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Term
| TRUE/FALSE? A solution, like sugar water, is an example of a homogeneous mixture? |
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Definition
| True. It is the same throughout. |
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Term
| TRUE/FALSE? When elements chemically combine, they usually form compounds that have properties that are similar to those of the uncombined elements. |
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Definition
| False! Consider table salt - NaCl. You can eat it. (Na is sodium, an explosive metal and Cl is chlorine, a poisonous gas) |
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Term
| TRUE/FALSE? You weigh more on the moon than you do on Earth. |
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Definition
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Term
| TRUE/FALSE? The density of a substance varies with samples of that substance. |
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Definition
| False. Each substance has a characteristic density. It does not matter how big the sample is. |
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Term
| TRUE/FALSE? Every chemical and physical change in matter includes a change in energy. |
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Definition
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Term
| TRUE/FALSE? Temperature is the AVERAGE of random motion of particles in matter. |
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Definition
| Yep! TRUE, TRUE, TRUE! When someone takes your temperature with a thermometer - the get an average of the temperature in your body. |
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Term
| TRUE/FALSE? Energy is the ability to do work or cause change. |
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Definition
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Term
| TRUE/FALSE? In chemical reactions, energy is never created or destroyed. |
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Definition
| True. It is just changed. |
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Term
| Physical/Chemical property? Texture. |
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Definition
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Term
| Physical/Chemical property? Ability to react with other substances. |
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Definition
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Term
| Physical/Chemical property? Hardness. |
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Definition
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Term
| Physical/Chemical property? Ability to conduct heat. |
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Definition
| Physical. The heat just moves through the object, like a spoon. It does not change it. |
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Term
| Physical/Chemical property? Ability to rust. |
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Definition
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Term
| Physical/Chemical property? Changing from a liquid to a solid through freezing. |
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Definition
| Physical. Consider ice. It is still water when it freezes. |
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Term
| A characteristic of a pure substance that can be observed without changing into another substance is called? |
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Definition
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Term
| A characteristic of a pure substance that describes its ability to change into a different substance |
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Definition
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Term
| The force of attraction between two atoms is called? |
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Definition
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Term
| A single kind of matter that is pure is called? |
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Definition
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Term
| The basic particle of an element is called? |
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Definition
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Term
| The study of the properties of matter is called? |
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Definition
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Term
| Anything that has mass and takes up space is called? |
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Definition
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Term
| A kind of homogeneous mixture? |
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Definition
| Solution (one thing dissolved in another, like salt water) |
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Term
| Tells the elements and ratio of atoms in a compound. |
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Definition
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Term
| A mixture in which you can see the different parts? |
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Definition
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Term
| A particle formed when two or more atoms combine is called? |
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Definition
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Term
| Any mixture in which different parts cannot be seen? |
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Definition
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Term
| Heterogeneous/Homogeneous? A dinner salad. |
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Definition
| Heterogeneous. (If you don't like a part, like tomatoes, you can pick them out!) |
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Term
| Heterogeneous/Homogeneous? Dam soil. |
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Definition
| Heterogeneous. You can see all the different pieces of bark, clay, etc. |
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Term
| Heterogeneous/Homogeneous? A pizza. |
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Definition
| Heterogeneous. It is easy to remove the items that you don't like. |
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Term
| Homogeneous. Brass - like for example, a brass lamp. |
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Definition
| Homogeneous. You can not see the individual metals that make up the brass. |
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Term
| Heterogeneous/Homogeneous? Milk. |
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Definition
| Homogeneous. It is well mixed so that all the individual parts don't separate. |
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Term
| The measure of the force of gravity on an object is called? |
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Definition
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Term
| The amount of space that matter occupies is called? |
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Definition
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Term
| A pure substance that cannot be broken down into any other substance by physical or chemical means is called? |
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Definition
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Term
| When atoms combine, the force of attraction that holds them together is called? |
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Definition
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Term
| Something that is made of two or more substances that are together in the same place but are not chemically combined? |
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Definition
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Term
| Why do scientists prefer to describe matter by its mass rather than its weight? |
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Definition
| Unlike weight, mass does not change with location, even when the force of gravity changes. |
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Term
| Describe two ways that mixtures are different from compounds. |
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Definition
1. Each substance in a mixture keeps its individual properties.
2. The parts of a mixture are not in a set ratio. |
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Term
| When milk sours, has a physical or chemical change taken place? |
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Definition
| Chemical. I know this because a smell is produced. New substances, like lumps, are produced. |
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Term
| Consider a candle burning on a table. Is the burning candle an example of endothermic or exothermic change? |
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Definition
| Exothermic. It gives off heat. Think EXIT (to leave) and EXothermic. |
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Term
| How are elements and compounds related? |
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Definition
| They are related because all compounds are makde of elements. |
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