Nature of Science
The variable in an experiment that is intentionally changed by the scientist.
What is the independent variable?
A characteristic of a substance that can be observed or measured without changing the substance's identity, such as color, density, or melting point.
What is a physical property?
The type of wave that sound is.
What is longitudinal?
A substance that is formed when two or more different elements are chemically bonded together, such as H2O or NaCl.
What is a compound?
This wave behavior occurs when a wave bounces off a surface, such as a mirror or a wall.
What is reflection?
Data that deals with descriptions that cannot be easily measured, such as color, texture, or smell.
What is qualitative data?
A marshmallow being toasted over a fire and lighting on fire.
What is a chemical change?
To increase the volume of a sound, this characteristic of a wave must be increased.
What is the amplitude?
Two or more atoms chemically bonded is this. H2O is example.
The distance between two ____ is the wavelength.
What is crests or troughs?
The number of grams in 1.35 kg.
What is 1350 g?
Iodine (I) is an example of this group of element. (Not the group number).
What is a halogen?
Waves are produced when energy is passed through a ___.
What is a medium?
When designing a cold pack, this type of reaction would be the most efficient.
What is endothermic?
True or False; Light waves traveling from a medium to another medium with the same index of refraction will slow down.
A student wants to see if taking different routes to school can get them to school faster. The time it takes to get to school is this.
An element that contains 5 valence electrons.
What is nitrogen, phosphorus, arsenic, antimony, or bismuth?
A wave has a speed of 20 cm/s and a wavelength of 5 cm. The frequency of the wave is this. (Correct answer needs to include units).
What is 4 Hz?
The coefficient in front of H2 when the following equation is balanced correctly:
N2 + H2 --> NH3
What is 3?
The part of the electromagnetic spectrum that has the least amount of energy.
What are radio waves?
A swimmer wants to know if listening to different types of music will increase their speed. A control in the experiment would be this.
What is:
-Distance swam?
-Type of bathing suit worn?
- Temperature of the water?
- Other answers may be considered.
Three pieces of evidence that confirm a chemical change has occurred.
What are production of a gas, change from colorless to clear (or vice versa), change in temperature, production of a solid (any of the 3).
Of a cement wall, a gallon of milk, or air, sound would travel the fastest through this.
What is the cement wall?
The number of protons, neutrons, and electrons in an atom of Palladium (Pd) with a mass of 106 amu.
What is 46 protons, 46 electrons, 60 neutrons.
This type of lens bends light into rays that converge and is used in a rear view mirror.
What is a convex lens?