science voc for exam
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| What are safety goggles used for? | The are used to protect your eyes. EX: When you are mixing chemicals. | ||||
| When would you use a triple beam balance? | When trying to find the mass of an object. EX: During lab, you you try to find the mass of a rock. | ||||
| What should you do when you break something during a lab? | Tell the teacher as soon as possible. EX: When you break a beaker, you tell the teacher. | ||||
| When you are trying to find the volume of a liquid, what lab equipment would you use? | graduated cylinder EX: When you are trying find out how much liquid in a graduated cylinder. | ||||
| What would you use a ruler for? | To measure how long something is. EX: Measuring how long your pencil is. | ||||
| What is a physical change? | A change where a substance physically changes,but its chemical properties dtay the same. EX: melting ice | ||||
| What are the parts of an atom? | Electron, protons, netrons. EX: hydrogen has 1 electron, 0 netrons, 1 proton | ||||
| What does the periodic table show? | It shows all the elements by the order of increasing atomic number. EX: Hydrogen, Helium... | ||||
| What is a chemical change? | A change in which a subatance changes its chemical properties. EX: baking soda and vinigar. | ||||
| what is a chemical equation? | It is a way to describe chemical ractions using chemical formulas. EX: 2H+20->2HO | ||||
| What is Newton's 1st Law? | An object at rest stays at rest until acted on by an unbalanced force. An object in motion will stay in motion unless acted on by an unbalanced force. EX: Riding a skateboard and then falling when you hit the curb. | ||||
| What is Newton's 2nd Law? | The acceleration of an object depends on the mass and size of the object. EX: when your dad throws a pebble farther then you because he is using more force. | ||||
| What is Newton's 3rd Law? | For every action there is an equal and opposite reaction. EX: Rowing a conoe. | ||||
| What does it mean whan the line on an acceleration graph is straight? | It means there is a constant acceleration. EX: Not speeding up. | ||||
| What does it mean when the line on a speed graph is going down? | It means you are going back to were you started. EX: returning home. | ||||
| Describe an elliptical galaxy. | A galaxy that is usually large and bright. | ||||
| What is a light year? | It is the distance light travels in one year. EX: The distance between one star and another is 1 light year. | ||||
| Where can gamma rays be found in space? | It is found all over the universe. | ||||
| Describe black holes. | They can suck up galaxies and light can't even escape. | ||||
| What are ultraviolet rays? | rays thta are found in the sun. |
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Created by:
waq
on 2010-12-07