Variables
In an experiment, the variable that "I" changed is called the __________ variable.
Independent Variable
Which TWO of the following subatomic particles are inside the nucleus?
protons & neutrons
What is a blow dryer energy transformation?
electrical → thermal
A renewable resource is
Something that is always available and replaced quickly
How can solar radiation be classified?
Visible light, Infrared Light, Ultraviolet
An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, sunlight, and listens to the same music. In this investigation, the independent variable is ...
The type of liquid
Neutrons have a ______________ charge.
neutral
Which are related to light energy?
electromagnetic , radiant
Which renewable resource is created using a dam or control gates?
Hydroelectric Power
C3H8 is a . . . .
Compound
A student wants to test the effects of different types of exercise on heart rate. What is the dependent variable?
heart rate
What is the atomic number?
the number of protons in the nucleus
Which is NOT associated with Chemical energy ?
batteries,food,burning of fuel,atoms
atoms
Biomass Fuels are created from
materials that were once part of living things
How many total atoms are in this compound?
C3H8
11
What the scientist is measuring in the experiment is the...
Dependent Variable
What is the mass number?
the number of protons and neutrons in the nucleus
Ability to do work is __.
Energy
What are examples of fossil fuels?
coal, oil, natural gas
How may different elements are in this compound?
CO2
2
Which of the following best describes the relationship between an independent variable and a dependent variable?
The independent variable is changed to observe its effect on the dependent variable.
An atom has an atomic number of 15 and a mass number of 31. How many protons are there in the atom?
15
Energy transformation from wind farm?
mechanical → electrical
Nuclear energy is a ___ resource.
nonrenewable
Chemical reactions are modeled by chemical equations. If all the atoms are accounted for on both sides of the equation, it is said to be (a)
Balanced