the structure of matter
Which of the following can be made up of two or more atoms of the same element, chemically bonded? a. atom b. mixture c. compound d. molecule
d. molecule
The speed in a particular direction
velocity
A balloon is rubbed all over with wool. The balloon will now attract the wool because the balloon and the wool a. are magnets b. have opposite charges c. have like charges d. have neutral charges
b. have opposite charges
Name 5 types of energy
mechanical, sound, chemical, electrical, heat, nuclear, light
Which of the following is not a medium? a. space b. air c. water d. wood
a. space
Which of the following is smaller than a single atom? a. proton b. mixture c. element d. solution
a. proton
the rate of change in velocity
acceleration
A circuit in which all parts are connected end to end to provide a single path for current is ?
a series circuit
Burning a candle.
Chemical energy -> heat energy + light energy
What are light waves?
refers to electromagnetic radiation of any wavelength, whether visible or not OR electromagnetic radiation, particularly radiation of a wavelength that is visible to the human eye.
A student is investigating a sample of an element. The student observes that the element is solid, shiny, and can be bent into a new shape. The student is most like observing a. carbon b. hydrogen c. aluminum
c. aluminum
What happens to an object of the forces acting on it are balanced? a. the motion changes direction b. the motion does not change c. the motion speeds up d. the motion slows down
b. the motion does not change
The potential difference across a component in a circuit is?
a voltage
A hungry football player eating a large sandwich to use the food for energy.
Chemical energy -> mechanical energy
What are sound waves?
A wave of compression and rarefaction, by which sound is propagated in an elastic medium such as air
Which of the following is a chemical symbol representing an element? a. C b. CO c. CO2 2. H2O
a. C
A person produces the least friction moving across which of these surfaces? a. carpet b. ice c. sand d. wood floor
b. ice
The unit of electric current, equivalent to one coulomb per second is?
ampere (amp)
Using a solar-powered calculator.
Radiant energy -> electrical energy ->light energy
What are compressional waves?
a shock wave that compresses the medium through which it is transmitted.
The Law of conservation of matter states that...
matter cannot be created or destroyed
a noncontact force that attracts objects toward one another
gravity
A device that converts electrical energy into mechanical energy is?
an electric motor
A solar panel on the roof of a building used to heat and cool the building.
Radiant energy -> electrical energy
What are compressional waves, also refered to as?
"LONGITUDINAL WAVES"