6.1 Scientific Method
A series of steps used by scientists to solve a problem or answer a question
Electrons carry a _______________ charge and exist where?
Negative; electron cloud (outside of the nucleus)
Water is known as the universal _______________ because it can dissolve almost anything
Solvent
All of the non-living things in an environment is called..
What does the whole number in an element represent on the periodic table? It is usually in the top corner of the element's box
Atomic Number
A group of students design different model telescopes. The models are all different lengths and have different-sized lenses. Which tool should the students use to compare the sizes of the model telescopes?
Ruler
What two subatomic particles exist INSIDE the nucleus?
Protons and Neutrons
What type of weathering will cause nails to rust?
Chemical or physical?
Chemical weathering
A lowland area that is saturated with water that supports the natural habitat of wildlife is known as...
Wetlands
What separates watersheds?
Ridgelines
A student wants to test how different amounts of heat affect the time it takes for chemical reaction to occur with two different elements. The student hypothesizes that increasing the heat will make the reaction happen faster. In this experiment, what is the INDEPENDENT VARIABLE?
The amount of heat
A single element is represented by a symbol. How is a compound represented?
Formula or reaction
Formula
Which process of phase changes turns a gas back into a liquid?
True or false:
Turbidity, salinity, temperature, pH, and presence of macroinvertebrate organisms are all examples of factors that are used to monitor WATER QUALITY
True
What are the 3 main watershed systems in Virginia?
The Chesapeake Bay, North Carolina Sounds, and Gulf of Mexico
A science class is testing how different amounts of vinegar affect the speed of a baking soda reaction. They use different amounts of vinegar: 50 mL, 100mL, and 150mL. Then they mix each amount of vinegar with a fixed amount of baking soda and measure how quickly the bubbles form. What is the DEPENDENT VARIABLE?
The speed of the the bubbles form; how fast the bubbles form
What is the decimal number in an element represent?
Atomic Mass
The unique property of water that allows some insects to "walk on water" or paper clips to float is known as...
Surface tension or cohesion
Surface tension
Estuaries
Frost wedging is when water gets into the cracks of a rock, freezes, and causes the rock to bust open into smaller pieces. The rock breaking inot smaller pieces is an example of what type of weathering
Physical weathering
Read the hypothesis:
If wood is used to heat a house, then the amount of air pollution around the house will increase.
What is the dependent variable in this experiment?
Amount of wood used or amount of air pollution
Amount of air pollution
This equation models a change in matter that produces a new substance. This is a representation of a _________________.
4Fe + 3O2 --> 2Fe2O3
Chemical change or Bonding Change?
Chemical change
When water sticks to substances that are not water, we call this.....
Adhesion
A land area that water flows across on its way to a stream, lake, or other body of water
Watershed
Two or more atoms that are chemically combined are called...
Mixtures or compounds?
Compounds