Answer: The density, ρ, of an object is defined as the ratio of its mass to its volume. ... Mass and volume are extensive (or extrinsic) properties of matter - they ... In this experiment, you will measure masses and volumes to determine density.
Explanation:
Answer is Middle Paleozoic era.
Paleozoic era was in 542 Ma - 245 Ma and it has 6 periods as Cambrian, Ordovician, Silurian, Devonian, Carboniferous and Permian.
360-280 Ma - forming of vascular plants with woody tissues, seeds and veins.
430 - 410 Ma - forming of jawed fishes and first amphibians.
420 Ma - forming of scorpions
360 Ma - forming of crustaceans.
Answer:
Secondary succession occurs when the severity of disturbance is insufficient to remove all the existing vegetation and soil from a site. Many different kinds of disturbances, such as fire, flooding, windstorms, and human activities (e.g., logging of forests) can initiate secondary succession.
Answer:
Compound
Explanation:
everything else only produces a single image also I've used compound microscopes to observe living things
