Interactive Science Dictionary

1st Nine Weeks Science Words

1. autumnal equinox – the time when the length of daylight and the length of night time is about the same or 12 hours each
2.    density -  the amount of matter compacted into a given volume    
3.     liquid – a state of matter that has definite volume but no definite shape
4.     gas – a state of matter that has no definite shape or volume
5.     solid – is a state of matter that has a definite shape and a definite volume   
6.     mass – the amount of matter in an object.                                       
7.     weight – is a measure of the pull of gravity on an object.
8.     volume – is the amount of space an object takes up                                 
9.     amphibian an animal that has a backbone and lives in the water when it is young and on land when it is an adult
10.  mammalan animal that has a backbone and hair or fur    
11.  reptilean animal that has a backbone and dry leathery skin or scales
12. physical property – a characteristic of matter (such as: size, shape, or state) that can be observed or measured without changing the matter.
13.  observe– to gather information by using your 5 senses and/or measurement to describe matter
14.  vertebrate an animal that has a backbone           
15.  invertebratean animal that does not have a backbone      
16.  scienceknowledge about things of the real world
17.  matteranything that has mass and takes up space in another substance   
18.  mixture - the combination of two or more substances that do not form a new substance
19.  solution – a mixture with one substance spread out evenly in another substance   
20.  dissolve – to form a solution with another substance    
21.  hypothesis – a statement of what you think will happen in an experiment
22.  materials – all the things you use in an experiment
23.  procedure – a list of all the steps that you follow during an experiment     
24.  data – pieces of information collected in an experiment
25.  results – all the data that is collected from an experiment organized into tables and graphs
26. conclusion - whether the results of an experiment support the hypothesis and why it did or it didn’t 
27. physical changea change in size, shape, color, or state of matter
28.  compound – a substance whose molecules contain atoms of different elements
29. magnetic field – the area around a magnet where the force of magnetism can be felt
30. friction - a force between two surfaces rubbing against each other
31.  buoyant forcethe upward push of a liquid or gas on an object
32.  magnetism– a force that pulls magnetic materials across a distance
33.  magnet – any object that attracts objects made of iron, steel, cobalt, or nickel     
34.  force – a push or a pull
35.  gravity - a pulling force that attracts objects to each other                                                                        
36.  circuit -  a complete pathway of conductors through which electrons flow
37.  electricitya form of energy that is produced when electrons move from one place to another
38.  conductora material that allows electricity and heat to flow through it easily