Science Flashcards
What is the closest planet to the sun?
Mercury
The tendency of an object to resist change in motion is called?
Inertia
Fossils are most often found in what kind of rocks?
Sedimentary
Organisms that are in the same biological class must also be in the same?
Phylum
The density of a liquid is commonly expressed using what units?
Milliliters
What organism primarily regulates its internal body temperate by external means?
Butterfly
In the food chain, animals that primarily graze on grass as their food source are?
Primary Consumers
When light passes from the air into a glass lens, the light changes direction. This is known as:
refraction
What is an example of a mineral?
Diamond
The boundary where two air masses converge is called?
A front
What is an example of a chemical change?
Cooking of an egg
The DNA in an animal cell is found is what location?
Nucleus
What is an example of an amphibian?
Salamander
What is the most common gas in Earth’s atmosphere?
Nitrogen
What is the order of the planets?
Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune
pH scale definition
From the range 7-14, a solution is basic.
Whenever the value of pOH is greater than 7, then it is considered basic.
At pH 7, the substance or solution is at neutral and means that the concentration of H+ and OH- ion is the same.
From the range 1-7, a solution is acidic. So, whenever the value of a pH is less than 7, it is considered acidic.
What is the definition of an element?
An element is a substance consisting of atoms which all have the same number of protons - i.e. the same atomic number.
Elements are chemically the simplest substances and hence cannot be broken down using chemical methods. Elements can only be changed into other elements using nuclear methods.
What is the definition of an amphibian?
any cold-blooded vertebrate of the class Amphibia, comprising frogs and toads, newts and salamanders, and caecilians, the larvae being typically aquatic, breathing by gills, and the adults being typically semiterrestrial, breathing by lungs and through the moist, glandular skin.
What is the definition of natural selection?
the process whereby organisms better adapted to their environment tend to survive and produce more offspring. The theory of its action was first fully expounded by Charles Darwin and is now believed to be the main process that brings about evolution.
What is the definition of a renewable energy resource?
Renewable energy is generally defined as energy that comes from resources which are naturally replenished on a human timescale such as sunlight, wind, rain, tides, waves and geothermal heat.
What is homeostasis?
the tendency toward a relatively stable equilibrium between interdependent elements, especially as maintained by physiological processes.
What is electrostatic attraction?
Electrostatic attraction is the attraction between atoms of opposite charge that holds the atoms together in ionic bonds.
What is inertia?
the property of matter by which it retains its state of rest or its velocity along a straight line so long as it is not acted upon by an external force.
- resisting change!
What are biotic factors?
Biotic factors are the living parts of an ecosystem—the animals, plants and microorganisms.
