Scientific Investigations
What is the variable that is changed on purpose in an experiment?
Independent Variable
What are the three main subatomic particles?
Protons, Neutrons, Electrons
What is the term for water’s ability to dissolve many substances?
Universal Solvent
What are the two types of weathering?
Physical (Mechanical) and Chemical
What does the word "biotic" mean?
Living
What is the variable that is measured or observed in response to the change?
Dependent Variable
What part of the atom has a positive charge and is located in the nucleus?
Proton
The property of water that allows insects to walk on water or paper clips to float is known as
Surface Tension
Which type of weathering will cause nails to rust over time?
Chemical weathering
What does the term "abiotic" mean?
Nonliving
If you used wood to heat a house, then the amount of air pollution around the house will increase. What is the dependent variable? (Responding variable)
Amount of air pollution
What is the main difference between an element and a compound?
An element is made up of one type of atom (O = Oxygen) and a compound is 2 or more atoms of different elements chemically bonded (OH = Oxygen and Hydrogen)
What process causes the phase change of gas to a liquid such as dew in the morning or water droplets on the outside of the glass?
Condensation
What type of weathering cause a crack to form in a rock?
Physical Weathering
Turbidity, salinity, temperature, pH, and presence of macroinvertebrate organisms are all examples of factors that are used to monitor what?
Water quality
A scientist wants to test which fertilizer helps plants grow the tallest. What is the independent variable?
Type of fertilizer used
How are elements represented compared to how compounds represented?
Elements are represented by symbols and compounds are represented by formulas
Why do areas near water tend to be cooler in the summer and warmer in the winter
Because water is able to absorb heat energy with relatively little temperature change
When rocks are carried by wind, water, or gravity what is that process called?
Erosion
A lowland area that is saturated with water that supports a natural habitat of wildlife is known as a ___________ (it's very important for filtering out sediments and pollutants from getting in our water)
A wetland
An observation is made using your 5 senses and an inference is an interpretation made based on observations and prior knowledge
The equation 4fe + 3o2 → 2fe2o3 models a change in matter that produces a new substance. What kind of change is occuring?
A chemical change
Water molecules tend to stick together because they have a polar shape. What does it mean that water is a polar molecule?
A water molecule is positive on one side and negative on the other
When stalagmites are formed in a cave what process is that?
Deposition
Why are estuaries considered "nurseries" of the sea?
Because they are home to many organisms that live in the environment to raise their young