What are the small particles that make up an atom?
a) molecules, neutrons, electrons
b) protons, molecules, electrons
c) protons, neutrons, molecules
d) protons, neutrons, electrons
c) protons, neutrons, molecules
100
What is the basic unit of structure and function in living things?
a) cell
b) organ
c) organ system
d) tissue
a) cell
100
Which bodies of water contain most of Earth's water?
a) creeks
b) glaciers
c) oceans
d) rivers
c) oceans
100
Which small puffy clouds usually indicate fair weather?
a) cirrus clouds
b) cumulus clouds
c) cumulonimbus clouds
d) stratus clouds
b) cumulus clouds
100
Which two elements make up most of the sun?
a) hydrogen and oxygen
b) oxygen and water
c) nitrogen and oxygen
d) helium and hydrogen
d) helium and hydrogen
200
Which element is the building block around which the molecules of life are built?
a) carbon
b) chlorine
c) iodine
d) sodium
a) carbon
200
Which gas do humans release as waste?
a) ammonia
b) carbon dioxide
c) oxygen
d) nitrogen
b) carbon dioxide
200
What is a method of conserving water?
a) consuming
b) discarding
c) polluting
d) recycling
d) recycling
200
In which layer of the atmosphere does most of Earth's weather take place?
a) outer space
b) ozone layer
c) stratosphere
d) troposphere
d) troposphere
200
Which part of the electromagnetic spectrum do we feel as heat from the sun?
a) infrared waves
b) radio waves
c) visible waves
d) X-rays
a) infrared waves
300
What materials are good conductors of heat and electricity?
a) glasses
b) metals
c) nonmetals
d) plastic
b) metals
300
What is the main purpose of the digestive system?
a) to release wastes from the body
b) to exchange gases
c) to release nutrients from the food
d) to pump blood through the body
c) to release nutrients from the food
300
What chemical is left behind when water from the oceans evaporates and becomes fresh water?
a) chlorine
b) rain
c) salt
d) snow
c) salt
300
What happens in an area of high pressure?
a) cold, denser air sinks
b) cold, denser air rises
c) warm, denser air sinks
d) warm, denser air rises
a) cold, denser air sinks
300
Which list contains only outer planets?
a) Mercury, Pluto, Venus
b) Earth, Mars, Mercury
c) Jupiter, Pluto, Saturn
d) Jupiter, Mars, Pluto
c) Jupiter, Pluto, Saturn
400
By what method are elements organized in the periodic table?
a) color and appearance
b) chemical properties
c) discovery date
d) solubility
b) chemical properties
400
Which body part follows the esophagus in the digestive system?
a) colon
b) mouth
c) small intestine
d) stomach
d) stomach
400
A student knows that his family gets their water from a well. What often determines the amount of water that will be available to the family?
a) yearly rainfall and snowfall
b) daily temperature changes
c) distance from the ocean
d) height above sea level
a) yearly rainfall and snowfall
400
Which kind of air mass will bring hot, dry weather to the United States?
a) continental polar
b) continental tropical
c) maritime polar
d) maritime tropical
b) continental tropical
400
How many days does it take for the moon to complete one complete revolution around Earth?
a) 1 day
b) 7 days
c) 29 1/2 days
d) 365 1/2 days
c) 29 1/2 days
500
Which is a chemical property?
a) Hydrogen reacts with oxygen to form water.
b) Sulfur is a yellow solid.
c) Aluminum melts at 660* C.
d) Nitrogen boils at -196* C.
a) Hydrogen reacts with oxygen to form water.
500
Which material is NOT transported by vascular tissue?
a) nutrients
b) soil
c) sugar
d) water
b) soil
500
What happens to water vapor as it rises higher and higher in the air?
a) The vapor cools and then condenses to form clouds.
b) The vapor heats and then evaporates to form clouds.
c) The vapor heats and then condenses to form clouds.
d) The vapor cools and then evaporates to form clouds.
a) The vapor cools and then condenses to form clouds.
500
What happens to the ocean surface during a hurricane storm surge?
a) The surface rises after the storm passes.
b) The surface falls after the storm passes.
c) The surface rises ahead of the storm.
d) The surface falls ahead of the storm.
c) The surface rises ahead of the storm.
500
What holds Earth in its path as it revolves around the sun?
a) gravity opposing resistance
b) gravity combined with resistance
c) gravity opposing inertia
d) gravity combined with inertia