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Vocab #4
Weekly 8th grade vocab
Question | Answer |
---|---|
Magnitude | the strength of a force or object |
Balanced forces | forces that cause no change in the motion of an object |
Unbalanced forces | forces that always cause the motion of an object to change its speed and/or direction |
Medium | a material thru which waves can travel |
Crest | highest point of a wave |
Trough | lowest point of a wave |
Metamorphic | rocks that are changed into different kinds of rocks by heat and/or pressure |
Igneous | rocks that form when magma cools and hardens |
Magma | molten (hot liquid) rock inside the earth |
Lava | magma that reaches the earth |