Scientific Method
What is an independent variable?
What is changed....
What stays the same...
What I measure...
what I change
What statement is true about the connection between the Chesapeake Bay Watershed and the Atlantic Ocean?
a.Pollution anywhere in the Chesapeake Bay Watershed can affect organisms living in the Atlantic Ocean.
b.The Chesapeake Bay Watershed and Atlantic Ocean are not connected and do not affect one another.
c.People in New York (NY) live too far away to affect the waters of the Chesapeake Bay and Atlantic Ocean.
d.Waters from the Atlantic Ocean flow into the Chesapeake Bay, which affect rivers and streams in multiple states.
a.Pollution anywhere in the Chesapeake Bay Watershed can affect organisms living in the Atlantic Ocean
To describe this car’s motion, moving forward, a student should use its -
a.direction and speed
b.mass and volume
c.speed and color
d.volume and direction
direction and speed
Choose the answer that best supports the statement: "We all live downstream."
a. Runoff from the Chesapeake Bay flows through Fairfax County to the mountains.
b.Many rivers meet in Fairfax County and flow to the mountains.
c.Fairfax County supplies water to surrounding counties.
d.Runoff from the mountain flows through Fairfax County to the Chesapeake Bay.
d.Runoff from the mountain flows through Fairfax County to the Chesapeake Bay.
An open circuit -
a.allows the movement of electrical energy
b.can produce thermal energy
c.creates static electricity
d.prevents the movement of electrical energy
d.prevents the movement of electrical energy
What is a dependent variables
What is changed....
What stays the same...
What I measure...
(what I measure/observe
Which location in the ocean is likely to have the greatest water pressure, the coldest temperatures, and the smallest number of living organisms?
A. Continental Shelf
B. Continental Slope
c. Abyssal plain
D. Ocean Trench
D. Ocean Trench
select the correct answers.Identify the three scenarios which provide evidence that energy can be transferred between objects.
-A pot of water boiling after being put on a hot stove
-Counting the number of pencils on a desk
-Reading the title of a library book as it sits on a shelf
-Shooting a basketball during a game
-Solar panels powering the lights in a house
-Shooting a basketball during a game
-Solar panels powering the lights in a house
-A pot of water boiling after being put on a hot stove
A large body of still water, surrounded by land, that may have fresh or salt water is -
a bay
a lake
a river
an ocean
a lake
Many electrical wires are wrapped with a plastic coating because plastic is -
a.less expensive than steel
b.more dense than copper
c.able to keep its shape
d. a good insulator
d. a good insulator
What is the control?
What is changed....
What stays the same...
What I measure...
What stays the same...
Scientists know that the salinity of ocean water changes depending on its depth.
Which area would have the highest and lowest Salinity?
Highest = Ocean Trench
Lowest= Continental Shelf
A bowl of grapes is being pulled down by gravity and pushed up by the table, so it is staying in place. This combination of forces is known as -
-a machine
-friction
-gravitational force
-net force
net force
You must select three correct answers.
Virginia has a great variety of plant and animal resources. Which of the following describe the importance of plants and animals to humans?
-Animals increase pollution
-Plants provide oxygen
-Animals provide food
-Plants reduce erosion
-Animals provide building materials
-Plants provide oxygen
-Animals provide food
-Plants reduce erosion
A fan transforms electrical energy into -
a.thermal energy
b.radiant energy
c.mechanical energy
d.chemical energy
c.mechanical energy
A student tests if a paper airplane flies farther with paperclips attached to its nose. What is the independent variable?
The number of paperclips added.
You must select 2 correct answers.
As ocean depth increases, the ocean's -
temperature decreases
temperature increases
pressure decreases
pressure increases
temperature decreases
pressure increases
A student riding a bicycle observes that it moves faster on a smooth road than on a rough road. This happens because the smooth road has -
a.less gravity
b.more gravity
c.less friction
d.more friction
c.less friction
Which of these Virginia mineral resources is most often used for kitchen countertops?
a.Coal
b.Limestone
c.Granite
d.Gravel
c.Granite
Toya is sorting energy resources into renewable and nonrenewable groups. Which of these energy resources belongs in the renewable group?
a.Oil
b.Coal
c.Natural gas
d. Wind energy
d. Wind energy
Rebecca feeds her kitten two different types of food to see which one it eats first. What is the dependent variable?
Which food the kitten eats first.
You must select two correct answers.Which statements describe how different organisms obtain energy in food webs?
-Decomposers get energy when they break down dead organisms and waste.
-Energy flows from consumers to decomposers to producers in an ocean ecosystem.
-Producers get their energy from eating other producers or consumers.
-Producers use sunlight to make food and provide energy for the entire food web.
-Some consumers create their own food and others eat other consumers for energy.
Decomposers get energy when they break down dead organisms and waste.
Producers use sunlight to make food and provide energy for the entire food web.
Brian's lab group wants to know how friction affects motion. They designed an experiment to test the effect of different surfaces on the speed of an object. They covered a wooden block with different materials and then slid the block down a ramp and recorded its speed.
They ran the test 3 different times. Each time, they covered the block with a different material: felt, paper, and foil. The type of material used to cover the block is the -
a.constant
b.hypothesis
c.dependent variable
d.independent variable
d.independent variable
You must select all correct answers.
Clay can be found in the soils of many areas of Virginia. It has been used in making bricks and other materials for centuries. This is an example of -
-comparing Virginia's natural and cultivated forests
-how people have used a natural resource in Virginia
-how people have polluted different parts of Virginia
-the importance of different types of Virginia soil
-how people have used a natural resource in Virginia
-the importance of different types of Virginia soil
Students used the circuit shown below to test how well different metals conduct electricity. They used the two clips to connect pieces of different metals to the circuit, one at a time. Then they observed the reading on the meter.
Which two should be kept constant in this investigation?
a.The thickness of the metal tested
b.The type of metal tested
c.The reading on the meter
d. The battery used for each test
a.The thickness of the metal tested
d. The battery used for each test