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SCI_3B_FEB13_v2
Science Guide - 3er Bimester
Question | Answer |
---|---|
Matter | Anything that has mass and takes up space |
Mass | The amount of material that an object has |
Volume | The amount of space that matter takes up |
Length | The measured distance from one point to another point |
Density | The amount of mass in a certain volume of matter |
How is length measure? The tool | With a meter stick |
The basic unit of measure: Length | Meter |
How is volume of a solid measure? The tool | With a meter stick |
The basic unit of measure: Volume of a solid | Cubic meter |
How is the volume of a liquid measure? The tool | With a graduated cylinder |
The basic unit of measure: Volume of a liquid | Liter |
How is the mass of an object measure? The tool | With a balance or a scale |
The basic unit of measure: Mass | Gram |
Physical change | Change in matter that changes shape, size, color or estate but does not produce a difference kind of matter |
Chemichal change | A change in matter that produces a different kind of matter is |
Physical change, samples | + Cutting a paper + Painting a paper + Cutting an apple + Boiling water + Cutting a paper in a circle shape + Melting ice |
Chemical change, samples | + Burning paper + Burning gasoline + Making cheese with milk + Making paper from a tree + Iron pipe rusted + Baking a cake + Cooking an egg |
Force | A push or a pull on an object that can cause it to change motion |
Gravity | Force that pulls two objects toward one another because of their mass |
Inertia | The tendency of a moving object to stay in motion or a resting object to stay at rest |
Friction | A force that slows the motion of moving objects |
Energy | The ability to do work |
Potential energy | Energy that an object has because of position |
Kinetic energy | Energy of motion |
Potential energy, samples | + Bow and arrow, when a pull the cord + A snowball at the top of the hill + A stretched rubber band + A kid on the top of the slide + A boy hanging a ball + A boy in the swing |
Kinetic energy, samples | + Bow and arrow, when the cord is release + A snowball going down the hill + A kid going down the slide + A boy dropping the ball + A boy in the swing |
Mechanical energy | The kind of energy an object has because it can move or because is moving |
Chemical energy | Energy that comes from chemical changes |
Electrical energy | Energy that comes from the flow of electricity |
Work | The result of a force moving an object |
Tool | Machine that makes work easier |
Simple machine | Is a machine made or one or two parts |
Simple machine, samples | + Inclined plane + Wheel and axle + Pulley + Lever + Screw + Wedge |