Scientific Method
What is a hypothesis?
A prediction that can be tested, must use the words "If....Then"
Is air matter? Why or why not?
Yes, it has mass and takes up space. Has molecules that are spread apart and continuously moving
What tool measures air pressure?
Barometer
Which of the following is a renewable energy resource?
A) Coal
B) Natural gas
C) Solar energy
D) Oil
C) Solar Energy
Which of the following best defines matter?
A) Anything that emits light
B) Anything that has mass and takes up space
C) Only solids and liquids
D) Only substances you can see
B) Anything that has mass and takes up space
What is a constant variable?
Something that remains the same the entire time
What’s the difference between a mixture and a solution?
In a solution, substances dissolve evenly; in a mixture, they don’t.
What type of weather pattern can best be inferred for this location during this week? (SHOW PICTURE)
A. Mostly stormy with some sunny days
B. Mostly sunny with some stormy days
C. Mostly cloudy with no sunny days
D. Constantly rainy
A. Mostly stormy with some sunny days
Which is an example of a way to conserve natural resources?
A. Leaving the water running
B. Turning off lights when not in use
C. Throwing away recyclable cans
D. Cutting down more trees
B. Turning off lights when not in use
Which measurement tool is best for measuring the temperature change in an experiment involving heating a liquid over time?
A) A meter‐stick
B) A digital thermometer in degrees Celsius
C) A spring scale in Newtons
D) A stopwatch in seconds
B) A digital thermometer in degrees Celsius
You’re testing how sunlight affects plant growth. You put the plant on a table near a window. You water the plant 5 mL everyday. What’s your independent variable?
The sun
Which phase change happens when water vapor cools and becomes liquid water?
A) Freezing
B) Evaporation
C) Condensation
D) Sublimation
C) Condensation
Stratus clouds that cover the entire sky often bring —
A. Clear weather
B. Light rain or drizzle
C. Strong winds
D. Tornadoes
B. Light rain or drizzle
Which type of natural resource cannot be replaced by nature in a short amount of time?
Nonrenewable Resources
A mixture of sand and salt is made. The salt dissolves in water, the sand does not. Which statement is correct about this mixture?
A) The sand and salt chemically combined to form a new substance.
B) The sand changed its physical properties when mixed.
C) The salt dissolved without changing its chemical identity, and the sand remained separate.
D) The mixture is now a compound with fixed ratio.
C) The salt dissolved without changing its chemical identity, and the sand remained separate.
In an experiment, the independent variable is changed and the dependent variable is measured. Which is the dependent variable?
A) The variable that you keep constant
B) The variable you measure as a response
C) The variable that you change on purpose
D) The list of materials you use
B) The variable you measure as a response
Matter changes state. What do I need to change its state of matter? ( Solid -> Liquid -> Gas) or (Gas-> Liquid -> Solid)
Heat is being added or taken away
A rotating column of air that touches both a cloud and the ground is a —
A. Hurricane
B. Thunderstorm
C. Tornado
D. Blizzard
C. Tornado
Which action helps reduce pollution in rivers?
A. Dumping waste into drains
B. Planting trees near rivers
C. Using chemical fertilizers near water
D. Washing cars on driveways
B. Planting trees near rivers
When water vapor cools and changes into liquid droplets, this is called —
A. Condensation
B. Precipitation
C. Evaporation
D. Runoff
B. Precipitation
Why is it important to repeat experiments?
A. To prove the results are incorrect
B. To make the experiment longer and test more things
C. To ensure accuracy and reliability of the results
D. To use more materials to conduct the experiment
C. To ensure accuracy and reliability of the results
A pot is being heated over a fire. Which of these will happen when the temperature of the metal pot is increased?
A. The pot will begin to lose heat.
B. The molecules of the pot will move faster.
C. The metal will change into another metal.
D. The pot will shrink.
B. The molecules of the pot will move faster.
Clouds form when —
A. Water vapor cools and condenses
B. Rain falls to the ground
C. Air warms up near the surface
D. The sun melts snow
A. Water vapor cools and condenses
Name all 3 watersheds and the different waterways found in VA.
1. Chesapeake Bay
2. Gulf of Mexico
3.North Carolina Sounds
Rivers (James, York, Potomac, Rappahannock)
Bays (Chesapeake Bay)
Oceans (Atlantic Ocean)
Lakes (Lake Anna, Lake Drummond)
A weather map shows an “H” symbol over Virginia. What kind of weather is most likely?
A. Rain and storms
B. Cloudy skies and wind
C. Clear skies and calm weather
D. Snow and cold fronts
C. Clear skies and calm weather