Physical Science
If you dissolve 10g of sugar into 100g of water, what will the total mass of the solution be?
110g—Conservation of Matter
In a food web, these organisms get their energy directly from the sun.
Producers/Plants
Does the Sun appear to move across the sky because the Sun is moving, or because the Earth is rotating?
Earth is rotating
In an experiment, this is the factor that a scientist changes on purpose.
The Independent Variable
What percentage of Earth's water is salt water found in oceans?
About 97%
This is the property of a material that allows electricity or heat to flow through it easily.
Conductivity
If all the frogs in a pond ecosystem died, what would likely happen to the population of insects?
It would increase
This force pulls all objects on Earth toward the center of the planet.
Gravity
Why must a scientist perform an experiment multiple times?
To ensure the results are reliable/consistent
Name one "Abiotic" (non-living) factor in an ecosystem.
Rocks, Sunlight, Water, Air
A student mixes baking soda and vinegar and notices bubbles forming. Is this a physical or chemical change?
Chemical Change—gas production is evidence of a new substance
This process allows plants to turn sunlight, water, and CO2 into sugar.
Photosynthesis
If a star looks very dim, it might be smaller than our Sun, or it might just be... what?
Much farther away
If a student wants to see which fertilizer helps plants grow tallest, they must keep the amount of water and light the same. This is called a ________ test.
Fair Test
This is the layer of gases that surrounds the Earth.
The Atmosphere
Which test would you perform to see if a mystery metal is iron or aluminum?
A Magnetism Test—iron is magnetic, aluminum is not
Fungi and bacteria play this vital role by breaking down dead organisms and returning nutrients to the soil.
Decomposers
This is the name for the 365-day journey Earth takes around the Sun.
Revolution or Orbit
A student predicts that a heavy ball will fall faster than a light ball. This "educated guess" is called a...
Hypothesis
If you want to see if a material is a good insulator, you are checking if it stops the flow of what?
Heat or Electricity
You have a mixture of sand, salt, and iron filings. What is the first tool you should use to separate them?
A Magnet—to remove the iron filings
True or False: Energy in a food web eventually "disappears."
False—it is transferred from one organism to another, though some is lost as heat
At what time of day would your shadow be the shortest?
Noon—the Sun is at its highest point
Looking at a graph and stating "Plant A grew more than Plant B" is making an...
Observation or Data Analysis
Explain why we see different constellations in the winter than we do in the summer.
Because Earth orbits the Sun, our view of space changes throughout the year