Using a piece of equipment not listed in the lab directions is
What is not allowed (against the safety rules)
100
The ability to do work
What is energy
100
The basic unit of matter
What is an atom
100
The density of an object that has a mass of 40.0 g and a volume of 20.0 cm3
What is 2 g/cm3
100
A proposed explanation that can be tested
What is an hypothesis
200
The best eye protection devices are
What is (approved) goggles
200
When a ball bounces the ____ potential energy is transferred into kinetic energy of motion.
What is elastic
200
Anything that takes up space and has mass
What is matter
200
The density of 1/2 of a homogeneous building brick will be ___ as the density of the whole brick.
What is the same
200
The variable in an experiment that responds to the change; the measured variable
What is the dependent variable
300
When you are finished in the laboratory you should
What is clean up; wash your hands with soap and water
300
Which state of matter has the most energy?
What is plasma
300
Tea with sugar dissolved in it would be___
What is a homogeneous mixture
300
A student uses a balance to find the mass of a rock to be 25 g and uses the displacement method starting with 30 ml and going up to 40 ml to find the rock's density of
What is 2.5 g/cm3 or 2.5 g/ml
300
For an experiment to be valid or reliable it must be ___
What is repeatable
400
Horseplay or practical jokes in the laboratory (or classroom) are
What is dangerous and against the rules
400
Liquid water cooling and forming a solid is said to ___
What is freeze (solidify)
400
The state of matter in which molecules are attracted to each other but can change position is a ____.
What is a liquid
400
What does the diagram on the board illustrate about turbidity currents?
What is muddy water is more dense than seawater
400
An explanation supported by data and observations, which allows scientists to make predictions
What is a (scientific) theory
500
The device used to determine the mass of an object
What is a balance
500
When a liquid changes into a vapor it ___
What is evaporates or boils
500
A special characteristic of water that makes life on earth possible
What is exists in solid, liquid, gas at Earth's surface; or has hydrogen bonding that makes it polar (cohesive)
500
Density is a ___ property of matter.
What is intensive
500
Which of these is an observation:
a. a piece of chalk is short
b. a piece of chalk is 8.0 cm long
c. a piece of chalk is long
d. a piece of chalk is odd looking