chemistry
What is a chemical reaction?
a) A change in the state of matter.
b) A process where substances combine or break apart to form new substances.
c) A physical change that does not alter the substance.
d) The mixing of two liquids.
B
What is Newton's First Law of Motion?
an object at rest stays at rest, and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
True or False: The visible spectrum is the only part of the electromagnetic spectrum that can be seen by the human eye.
true
what is our galaxy
milky way galaxy
Which of the following is a chemical formula for a compound?
a) O2
b) NaCl
c) H
d) Ar
B
What is the difference between speed and velocity
Speed is a scalar quantity that refers to how fast an object is moving, while velocity is a vector quantity that includes both the speed of the object and the direction in which it is moving.
Which of the following has the shortest wavelength?
a) Radio Waves
b) Visible Light
c) Ultraviolet Light
d) Gamma Rays
d
how is our galaxy shaped
spiral
What information can you find in a square on the periodic table?
a) Atomic number, symbol, and atomic mass
b) Name of the element only
c) Only the atomic weight
d) Chemical properties only
A
How does mass affect gravitational force between two objects?
Mass affects gravitational force between two objects according to Newton's law of universal gravitation.
All electromagnetic waves travel at the speed of light in a vacuum.
true
where are we located
orion arm
What is an atom?
a) The smallest unit of a chemical element.
b) A type of molecule.
c) A mixture of substances.
d) A phase of matter.
A
difference between potential energy and kinetic energy
Potential energy is the stored energy of an object due to its position or condition, Kinetic energy is the energy of an object in motion
Name two uses of infrared radiation in everyday life.
remote controls, thermal imaging, night vision, and heating food.
what is an elliptical galaxy
oval shape with a bulge in the middle
What is the difference between an element and a compound?
a) An element can be broken down into simpler substances, while a compound cannot.
b) An element is made up of one type of atom, while a compound is made up of two or more different types of atoms.
c) There is no difference; they are the same thing.
d) An element is a mixture, while a compound is a pure substance.
B
Define kinetic energy
Kinetic energy is the energy an object has due to its motion.
what happens to light when it passes through a prism
When light passes through a prism, it is refracted, or bent, which causes the different colors of light to spread out and form a spectrum.
what is an irregular galaxy
no defined shape