Earth Science
Space Science
Physical Science
Life Science
Challenge
100
Picture Question 2009 12
A: troposphere
100
Which statement describes the location of our Sun in the universe? A. Our Sun orbits Earth in the Andromeda galaxy. B. Our Sun orbits Earth in the Milky Way galaxy. C. Our Sun is the center of a solar system in the Milky Way galaxy. D. Our Sun is the center of a solar system in the Andromeda galaxy.
C. Our sun in the center of a solar system in the Milky Way galaxy.
100
Picture Question 2009 2
C. It is a molecule made up of two elements.
100
Picture Question 3
D. The squirrel population is directly related to the number of acorns.
100
Picture Question 2009 17
a. X: 4 g/mL Y: .5 g/mL z: 1.5 g/mL b. X: sink Y: float z: float c. X: sink Y: float z: float
200
Picture Question 2009 14
C: Site X was once covered with a warm sea.
200
Picture Question 2010 10
B. They are made of rock.
200
Picture Question 2009 10
D: The electric energy changes into light and heat energy and is not destroyed.
200
Picture Question 2009 13
D: Yeast cell with a bud.
200
Picture Question 2010 8
B. sodium and potassium
300
Picture Question 2010 5
A. Seattle is closer to an ocean.
300
How do warm ocean currents move to cooler ocean regions of Earth? A. by conduction B. by convection C. by evaporation D. by radiation
B. by convection
300
Picture Question 2009 15
D: R=mixture, S= element, T=compound
300
Picture Question 2009 16
C: The marsh hawk population has increased.
300
During which process does genetic material come from two parents? A. asexual reproduction B. photosynthesis C. respiration D. sexual reproduction
D. sexual reproduction
400
What can scientists learn about the past by studying sedimentary rocks? A. how a species changed over time B. how animals make a shelter C. the color of leaves on a plant D. the number of chambers in a dinosaur's heart
A. how a species changed over time
400
What is the most likely outcome of the Moon moving away from the Earth? A. a lunar day is shorter B. a lunar eclipse lasts longer C. Earth moves closer to the Sun D. Earth's tides decrease in size
D. Earth's tides decrease in size.
400
Picture Question 2010 3
D: more than 400 nm and less than 700 nm.
400
Picture Question 2010 1
D. By the wind.
400
When the motion of liquid water molecules slows, what most likely happens? A. The liquid water forms a solid. B. The liquid water condenses. C. The liquid water undergoes a chemical change. D. The liquid water becomes a vapor.
A. The liquid water forms a solid.
500
What determines the size of crystals that form in igneous rocks? A. how fast or slow the rock cools B. the amount of water in the Earth's crust C. the minerals in the rock D. the luster of the rock
A. how fast or slow the rock cools
500
The phases of the moon happen because A. at different times parts of the Moon are in the shadow of the Earth B. at different times the Moon moves away from the Earth C. at different times the Earth faces away from the Moon D. at different times the Sun blocks the Moon
A. at different times parts of the Moon are in the shadow of the Earth
500
Giant redwood trees change energy from one form to another. How is energy changed by the trees? A. They change chemical energy into kinetic energy. B. They change solar energy into chemical energy. C. They change wind energy into heat energy. D. They change mechanical energy into solar energy.
B. They change solar energy into chemical energy.
500
Which type of the following is found in all living organisms? A. cell B. organ C. organ tissue D. tissue
A. cell
500
Which statement explains why a mother's unhealthy diet during pregnancy is harmful to her embryo's development? A. The embryo inherits half it chromosomes from its mother. B. The embryo receives its food from its mother through the placenta. C. The embryo receives oxygen through the placenta. D. The embryo receives mutations carried by its mother.
B. The embryo receives it food from its mother through the placenta
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