Final 6 Flashcards
What do we call a mixture in which the individual parts cannot be seen as separate?
Homogeneous
What do we call a mixture in which the individual parts can easily be seen?
Heterogeneous
Which law states that objects at rest tend to stay at rest and object in motion tend to stay in motion in a straight line unless acted upon by a force?
Newton’s First Law of Motion
Which law States that for every action there is an equal and opposite reaction?
Newton’s Third Law
True or false: Friction is a force that resists movement between to objects
True
True or false: Friction is a force that resists movement between two objects
True
True or false: lubricant increases friction to make something difficult to move
False
Can energy be created or destroyed
No
True or false: kinetic energy is stored energy?
False
True or false: stored energy is referred to as Potential energy
True
Name two kinds of renewable energy
Wind energy and solar energy
Name two forms of energy we get from fossils
Oil and natural gas
What do we call vibrations that travel through a material from a source?
Sound waves
True or false: ultrasound is too low for our ears to hear
False
What does ROY G. BIV stand for?
Red Orange Yellow Green Blue Indigo Violet
What are two kinds of invisible light at each end of the light spectrum?
Ultraviolet and infrared
True or false: Radiant heat and travel through space
True
What three things are needed to start a fire?
Oxygen
Fuel
Heat
True or false: electricity flows into your house through a direct current
False
What is the region around a magnet that produces a magnetic force?
Magnetic field
True or false: the earth core is made out of marshmallow
False
True Or false: a magnet powered by an electric current that can be turned off, it’s called an electromagnetic
True
What lever has the fulcrum in the center and a load and effort on opposite ends?
First class lever
What must a wheel have to work?
Axle
Which pulley system makes work easier?
Double pulley system
