Science Flashcards
Chemical weathering
the erosion or disintegration of rocks, building materials, etc., caused by chemical reactions (chiefly with water and substances dissolved in it) rather than by mechanical processes.
Sedimentary
Common sedimentary rocks include sandstone, limestone, and shale. These rocks often start as sediments carried in rivers and deposited in lakes and oceans. When buried, the sediments lose water and become cemented to form rock
Igneous
Form when hot, molten rock crystallizes and solidifies. The melt originates deep within the Earth near active plate boundaries or hot spots, then rises toward the surface. Igneous rocks are divided into two groups, intrusive or extrusive, depending upon where the molten rock solidifies.
Metamorphic
Form when rocks are subjected to high heat, high pressure, hot mineral-rich fluids or, more commonly, some combination of these factors. Often start out as igneous or sedimentary.
Chemical change
change of materials into another, new materials with different properties and one or more than one new substances are formed. (frying an egg)
Element
a pure substance consisting only of atoms that all have the same numbers of protons in their atomic nuclei.
pH
Scale of acidity from 0 to 14. It tells how acidic or alkaline a substance is. More acidic solutions have lower pH. More alkaline solutions have higher pH. Substances that aren’t acidic or alkaline (that is, neutral solutions) usually have a pH of 7
How is density of liquid expressed?
grams per milliliter
Biological classification
Kingdom, Phylum, Class, Order, Family, Genus, Species
How does the moon affect the tides?
The moon’s gravitational pull generates something called the tidal force. The tidal force causes Earth—and its water—to bulge out on the side closest to the moon and the side farthest from the moon. These bulges of water are high tides.
Cell Mitosis
a type of cell division in which one cell (the mother) divides to produce two new cells (the daughters) that are genetically identical to itself.
Homeostasis
tendency toward a relatively stable equilibrium between interdependent elements, especially as maintained by physiological processes.
In an atom, what is positively charged and negatively charged?
Protons are positive electrons are negative. a neutral atom has an equal number of protons and electrons.
Salinity
the saltiness or amount of salt dissolved in a body of water. High rates of evaporation cause high surface salinity rates.
Plant life cycle
seed, germination, stems and roots, leaves, flowers, pollination.
