Which direction does the needle of a compass point?
north
south
west
What is every object in our world made of?
solids
mass
matter
About what percentage of Earth is covered by water?
50 percent
60 percent
70 percent
The word habitat refers to what?
a large, open area
a place where an organism lives
a subset of a specific ecosystem
How many days does it take Earth to travel around the sun?
365 days
24 days
132 days
How many subatomic particles are in an atom?
two
three
five
About how long ago did modern humans first appear?
200,000
2 million
12 million
What does the periodic table display?
elements according to their atomic numbers
the evolutionary time periods of life on Earth
the geologic layers that represent different eras of Earth's creation
What term describes a group of organisms and their physical environment?
niche
mutualism
ecosystem
What are the abiotic factors of an environment?
the nonliving parts of an environment
the asymmetrical parts of an environment
the disappearing parts of an environment
Newton's third law of motion states that every action has what?
both motion and rest
an equal and opposite reaction
a consequence
There you have it.... Answers below.
ANSWERS
north (The point is drawn toward the magnetic North Pole).
matter (Atoms and molecules are made of matter).molecules are made of ma
70 percent (Seventy percent of Earth is covered by water, and most of that is ocean).
a place where an organism lives (A habitat is a place where an organism lives. Loss of habitat is a reason that many species disappear).
365 days (This 365-day cycle is the basis for our calendar system).
three (The three main subatomic particles in atoms are electrons, protons and neutrons).
200,000 (Modern humans appeared about 200,000 years ago, and dinosaurs went extinct about 65 million years ago, so of course our forefathers never hunted the T. rex).
elements according to their atomic numbers (Elements with similar properties are in the same column).
ecosystem (Earth is home to many diverse ecosystems).
the nonliving parts of an environment (Soil and rain are examples of the nonliving parts of an environment).
an equal and opposite reaction (The law that every action has an equal and opposite reaction affects all of us, every moment of every day).
The point is drawn toward the magnetic North Pole.
The point is drawn toward the magnetic North Pol
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