Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Science
| Question | Answer |
|---|---|
| What is matter? | Matter is anything that has weight and takes up space. |
| What is volume? | Volume is the measure of the amount of space an object or liquid takes up. |
| What are the three main states of matter? | The three main states of matter are solid, liquid, and gas. |
| How can you prove that air takes up space using a balloon? | An inflated balloon cannot fit into a small box that an empty balloon easily fits into because the air inside takes up space. |
| How can you prove that air has weight using a meter stick balance? | A meter stick with one inflated balloon and one empty balloon tilts toward the inflated balloon because air adds weight. |
| What is an element? | An element is a pure substance made of only one type of atom that cannot be broken down into simpler substances. |
| What is an atom? | An atom is the smallest single unit of an element. |
| What three subatomic particles make up an atom? | An atom is made up of protons, neutrons, and electrons. |
| Where are protons and neutrons located in an atom? | Protons and neutrons are located inside the nucleus at the center of the atom. |
| Where are electrons located in an atom? | Electrons orbit outside the nucleus of an atom. |
| How are elements organized on the Periodic Table? | Elements are organized on the Periodic Table based on their number of protons. |
| What is the rule for writing a single-letter chemical symbol? | A single-letter chemical symbol is ALWAYS uppercase. |
| What is the rule for writing a two-letter chemical symbol? | The first letter is ALWAYS uppercase and the second letter is ALWAYS lowercase. |
| What element is represented by the chemical symbol O? | Oxygen is represented by the single letter O. |
| What element is represented by the chemical symbol C? | Carbon is represented by the single letter C. |
| What element is represented by the chemical symbol Au? | Gold is represented by the two-letter symbol Au. |
| What element is represented by the chemical symbol Li? | Lithium is represented by the two-letter symbol Li. |
| What element is represented by the chemical symbol Ca? | Calcium is represented by the two-letter symbol Ca. |
| What element is represented by the chemical symbol Fe? | Iron is represented by the symbol Fe. |
| What element is represented by the chemical symbol Ar? | Argon is represented by the symbol Ar. |
| What element is represented by the chemical symbol Mg? | Magnesium is represented by the symbol Mg. |
| What is a compound? | A compound is a pure substance made of two or more different elements chemically combined in a specific ratio. |
| How do the properties of a compound compare to the elements that make it up? | A compound has entirely different properties than the individual elements that formed it. |
| What liquid compound is formed when hydrogen gas and oxygen gas combine chemically? | Hydrogen gas and oxygen gas combine to form liquid water (H2O). |
| What compound is formed from sodium and chlorine? | Sodium and chlorine combine chemically to form table salt (NaCl). |
| What is a molecule? | A molecule is a substance with two or more same or different atoms chemically bonded together. |
| What is the key phrase that describes the relationship between molecules and compounds? | All compounds are molecules, but not all molecules are compounds. |
| Why is O2 classified as an element and a molecule, but not a compound? | O2 is made of two atoms of the exact same element, so it is a molecule but not a compound. |
| Why is CO2 classified as both a molecule and a compound? | CO2 is made of two different elements (Carbon and Oxygen) chemically joined. |
| What is a chemical formula? | A chemical formula uses chemical symbols and numbers to represent the exact types and numbers of atoms in a compound. |
| What is a subscript in a chemical formula? | A subscript is a small number set below and to the right of an element showing how many atoms of that element are present. |
| What is the rule if an element symbol has no subscript? | If an element has no subscript, it is assumed that there is 1 atom of that element. |
| Can you ever change a subscript in a chemical formula? | No, you must NEVER change a subscript in a chemical formula. |
| What is a coefficient in a chemical formula? | A coefficient is a large number placed in front of a formula that multiplies every atom in that compound. |
| How do you calculate total atoms when a formula contains parentheses? | You distribute and multiply the subscript outside the parentheses by every element inside the parentheses. |
| How many Carbon, Hydrogen, and Oxygen atoms are in (CH3)2CO? | There are 3 Carbon atoms, 6 Hydrogen atoms, and 1 Oxygen atom (total 10 atoms). |
| How many Iron and Sulfur atoms are in 2FeS? | There are 2 Iron atoms and 2 Sulfur atoms (total 4 atoms). |
| How many Hydrogen, Sulfur, and Oxygen atoms are in H2SO4? | There are 2 Hydrogen atoms, 1 Sulfur atom, and 4 Oxygen atoms (total 7 atoms). |
| How many elements and total atoms are in CaCl2? | CaCl2 has 2 elements (Calcium and Chlorine) and 3 total atoms. |
| How many elements and total atoms are in CH3OH? | CH3OH has 3 elements (Carbon, Hydrogen, Oxygen) and 6 total atoms. |
| How many total atoms are in Ca3(PO4)2? | Ca3(PO4)2 contains 3 Calcium, 2 Phosphorus, and 8 Oxygen atoms, totaling 13 atoms. |
| How many total atoms are in 3Ca(OH)2? | 3Ca(OH)2 contains 3 Calcium, 6 Oxygen, and 6 Hydrogen atoms, totaling 11 atoms. |
| How many total atoms are in 2Al2(SO4)3? | 2Al2(SO4)3 contains 4 Aluminum, 6 Sulfur, and 24 Oxygen atoms, totaling 34 atoms. |
| How many Carbon, Hydrogen, and Oxygen atoms are in 6C9H8O4 (aspirin)? | It contains 54 Carbon atoms, 48 Hydrogen atoms, and 24 Oxygen atoms (total 126 atoms). |
| What are reactants in a chemical reaction? | Reactants are the starting materials written on the left side of a chemical equation. |
| What are products in a chemical reaction? | Products are the new chemical substances formed on the right side of a chemical equation. |
| What does the arrow in a chemical equation represent? | The arrow represents the chemical reaction and is read as yields or produces. |
| What is a physical change? | A physical change alters the form or appearance of a substance without changing it into a new substance. |
| Are physical changes usually reversible? | Yes, physical changes are usually easily reversible. |
| What happens to the chemical formula of a substance during a physical change? | The chemical formula remains exactly the same before and after a physical change. |
| Is melting ice a physical or chemical change? | Melting ice is a physical change because it is simply water changing state from solid to liquid. |
| Is cutting paper a physical or chemical change? | Cutting paper is a physical change because only the shape and size are altered. |
| Is dissolving salt or sugar in water a physical or chemical change? | Dissolving in water is a physical change because you can separate the solute back out. |
| Is boiling water a physical or chemical change? | Boiling water is a physical change because it changes liquid water to water vapor. |
| What are three clues that ice melting in lemonade is a physical change? | The ice disappears, the liquid becomes colder, and water vapor condenses on the outside of the glass. |
| What is a chemical change? | A chemical change occurs when substances undergo a reaction to form entirely new substances with different properties. |
| Are chemical changes easily reversible? | No, chemical changes usually cannot be undone or reversed. |
| What happens to original reactants during a chemical change? | Original reactants are used up as atoms rearrange into completely new products. |
| What are six common signs of evidence for a chemical change? | Effervescence (gas production), unexpected color change, temperature change, light/sound production, new smell, and precipitate formation. |
| What is effervescence? | Effervescence is the production of gas bubbles during a chemical reaction. |
| What is a precipitate? | A precipitate is a solid that forms and settles out of a liquid during a chemical reaction. |
| Is burning wood a physical or chemical change? | Burning wood is a chemical change because wood reacts with oxygen to form ash, carbon dioxide, and water vapor. |
| Is baking a cake a physical or chemical change? | Baking a cake is a chemical change because heat transforms batter into a new substance that cannot be undone. |
| What evidence of chemical change occurs when baking a cake? | Absorption of heat, color change to golden brown, delicious new smell, and CO2 gas bubbles creating spongy holes. |
| What evidence shows a burning match undergoes a chemical change? | Color change to black ash, release of light and smell, giving off heat, and impossibility of reversing the ash back into a match. |
| Why is leaves changing color in autumn a chemical change? | It is a chemical change because chemical reactions break down chlorophyll and create new pigment molecules. |
| What is an endothermic reaction? | An endothermic reaction absorbs heat energy from its surroundings, causing temperature to drop. |
| What does the prefix Endo mean? | The prefix Endo means inside or taking in. |
| What is an exothermic reaction? | An exothermic reaction releases energy into its surroundings in the form of heat or light. |
| What does the prefix Exo mean? | The prefix Exo means outside or giving off. |
| What is a mixture? | A mixture is a combination of two or more substances that are physically mixed together but not chemically joined. |
| What is a solution? | A solution is a homogeneous mixture that looks uniform and identical throughout. |
| What does homogeneous mean? | Homogeneous means that a mixture has a uniform composition and looks exactly the same all the way through. |
| What is a solute? | A solute is the substance that gets dissolved in a solution. |
| What is a solvent? | A solvent is the substance that does the dissolving in a solution. |
| In a saltwater solution, what is the solute and what is the solvent? | Salt is the solute and water is the solvent. |
| In lemonade made from powder and water, what is the solute and what is the solvent? | Lemon powder is the solute and water is the solvent. |
| What is an aqueous solution? | An aqueous solution is any solution where water acts as the solvent. |
| What does the root word Aqua mean? | Aqua means water. |
| What are two examples of aqueous solutions in the human body? | Sweat and tears are aqueous solutions in the human body. |
| Why can solutions not be separated by filtering? | Solution particles are so tiny that they pass directly through filters without settling out. |
| Do solution particles settle out over time or scatter light? | No, true solutions do not settle out over time and do not scatter a beam of light. |
| What is solubility? | Solubility is the measure of how much solute can dissolve in a given amount of solvent at a specific temperature. |
| What does it mean for a substance to be soluble? | A substance is soluble if it is capable of dissolving in a liquid. |
| What does it mean for a substance to be insoluble? | A substance is insoluble if it fails to dissolve in a liquid. |
| Name three substances that are soluble in water. | Salt, sugar, and baking powder are soluble in water. |
| Name three substances that are insoluble in water. | Chalk, starch, and sand are insoluble in water. |
| How do soluble and insoluble solid particles typically differ in texture? | Soluble substances are usually crystalline and grainy, while insoluble substances are powdery and dry. |
| What does miscible mean? | Miscible describes two liquids that mix completely together to form a clear uniform solution, like water and ethanol. |
| What does immiscible mean? | Immiscible describes two liquids that fail to mix together, like oil and water. |
| What is an unsaturated solution? | An unsaturated solution can still dissolve more solute at a given temperature. |
| What is a saturated solution? | A saturated solution contains the maximum amount of dissolved solute possible; no more can. |
Created by:
user-2060504