These two factors are what cause the seasons on Earth.
What is the Earth's tilt at 23.5 degrees and the Earth's revolution around the sun?
100
This is where the sun hits the Earth most directly.
What is the equator?
100
Carbon dioxide and water are converted into sugar and oxygen during this process.
What is photosynthesis?
100
This unit best represents the density of an object.
What is g/cm3
100
The correct order (from smallest to largest) of the following words is:
ecosystem, population, organism, community
What is:
organism -- population -- community -- ecosystem ?
200
The season that people in New England experience when the Northern Hemisphere is tilted away from the sun.
What is winter?
200
This occurs during a full moon when Earth is directly between the moon and the sun.
What is a lunar eclipse?
200
Substances enter any plant or animal cell by passing through this structure.
What is the cell membrane?
200
The smallest unit of an element that still contains the properties of that element is this.
What is an atom?
200
Jonathan rode his bike on a road for a 2 hr
period. On average, he passed a 1 km
marker every 3 min during this period.
This was his average speed for this 2 hr period..
What is 20 km/hr?
300
This occurs when the moon passes directly between Earth and the sun, blocking sunlight from Earth in what we see as a New Moon.
What is a solar eclipse?
300
The correct order of the following words (from smallest to largest) is:
star, universe, solar system, galaxy
What is star, solar system, galaxy, and universe?
300
Most of the bacteria in a forest ecosystem are best classified as this type of organism?
What is a decomposer?
300
Air, since it consists of multiple molecules NOT chemically combined, is an example of this.
What is a homogenous mixture?
300
Glucose is composed of carbon, hydrogen,
and oxygen, and is therefore called this...
What is a molecule and a compound?
400
This is the main cause of tides, or the rise and fall of the oceans.
What is the gravitational pull of the Moon?
400
Together, the crust and upper mantle of Earth are called this.
What is the lithosphere?
400
Exchanging gases with the environment is the main function of this body system.
What is the respiratory system?
400
This is formed when two different elements are chemically combined.
What is a compound?
400
Sugar crystals dissolving in water is an example of the formation of this....
What is a mixture?
500
This causes day and night on Earth.
What is the rotation of Earth about its axis?
500
This layer of Earth is composed primarily of solid iron.
What is the inner core?
500
These substances are the direct products of cellular respiration.
What are carbon dioxide, water, and ATP?
500
Mrs. Mehurg measured the mass of a closed
beaker containing several ice cubes. The
mass was 80 g. An hour later, after the
ice cubes had melted, Mrs. Mehurg
measured the mass of the beaker again.
The mass of the beaker of water
the second time was...
What is 80g?
500
This tool is most useful for tightening a small mechanical
fastener.