## General Science Flash Card Set 857391

 Cards 10 Topics Acceleration, Blood Cells, Classification of Life, Curved Mirrors, Domain, Health Benefits of Vitamins & Minerals, Kinetic Energy, Power, Vectors

#### Study Guide

###### Acceleration

Acceleration is the rate of change of velocity per unit of time. In physics, the delta symbol ($$\Delta$$) represents change so the formula for acceleration becomes $$\vec{a} = { \Delta \vec{v} \over t }$$

###### Blood Cells

Blood is created in bone marrow and is made up of cells suspended in liquid plasma. Red blood cells carry oxygen, white blood cells fight infection, and platelets are cell fragments that allow blood to clot.

###### Classification of Life

Classifications of life are too numerous to enumerate, here's an overview of the classifications from broadest to narrowist:

Classification Contains Related
Kingdom phyla
Phylum classes
Class orders
Order families
Family genera
Genus species
Species organisms

###### Curved Mirrors

A concave (or converging) mirror bulges inward and focuses reflected light on the mirror's focal point where the mirror's angles of incidence converge. In contrast, a convex (or diverging) mirror bulges outward and diffuses the light waves that strike it. A common use of a concave mirror is in a reflecting telescope, a common use of a convex mirror is in the side view mirror of a car.

###### Domain

The broadest classification of life splits all organisms into three groups called domains. The three domains of life are bacteria, archaea and eukaryota.

###### Health Benefits of Vitamins & Minerals
Vitamin / Mineral Sources Health Benefits
Calcium Dairy products (milk, yogurt, cheese), spinach. Aids bone growth and repair, muscle function.
Iron Red meat, beans, whole grains. Allows red blood cells to transfer oxygen to body tissues.
Magnesium Nuts, whole grains, green leafy vegetables. Muscle, nerve, and enzyme function.
Potassium Bananas, nuts, seeds. Helps balance fluid levels in the body.
Vitamin A Liver, milk, eggs, carrots. Vision, immune system, cell growth.
Vitamin C Green and red peppers, citrus fruits, broccoli. Collagen formation, immune system function, antioxidant (helps protect cells from damage).
Vitamin D Exposure to sunlight. Helps calcium strengthen bones, muscle, nerve, and immune system function.
###### Kinetic Energy

Kinetic energy is the energy posessed by a moving object. Potential energy is stored energy in a stationary object based on its location, position, shape, or state.

###### Power

Power is the rate at which work is performed or work per unit time: $$P = {w \over t}$$ and is measured in watts (W).

###### Vectors

Velocity and displacement are vector quantities which means each is fully described by both a magnitude and a direction. In contrast, scalar quantities are quantities that are fully described by a magnitude only. A variable indicating a vector quantity will often be shown with an arrow symbol: $$\vec{v}$$