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Force & Motion
Matter
The Universe
Ecosystems
Earth Science
100
Calculate the speed of an object traveling 15 meters in 30 seconds?
0.5 m/sec
100
What is volume?
the amount of space, measured in cubic units, that an object or substance occupies.
100
What causes the seasons on Earth?
the tilt of the Earth on its axis
100
What is a decomposer?
organism that breaks down other organisms into simpler substances
100
What is the difference between weather and climate?
Weather is the day to day conditions of the atmosphere. Climate is prevailing weather conditions of a region throughout the year averaged over several years.
200
When forces are balanced explain the motion of an object.
The motion of the object remains unchanged. Objects at rest remain at rest, and objects in motion remain in motion.
200
What is matter?
Matter is anything that has mass and takes up space (or has volume).
200
During July which hemisphere is receiving more direct sunlight?
Northern Hemisphere
200
What special adaptation, besides feathers, allows birds to fly?
hollow bones
200
What happens to the temperature as the altitude increases?
the temperature decreases
300
Name the six simple machines.
pulley, inclined plane, screw, wedge, lever, wheel and axle
300
How is sound energy transferred?
Sound energy is transferred through a medium by wave-like disturbances (vibrations).
300
What celestial body orbits the sun and is from 480 miles to less than one mile in diameter?
asteroid
300
Given the following food chain: grass, grasshopper, robin, and hawk. What would happen if the robins all suddenly died from a disease?
Hawk population would decrease and the grasshopper population would increase causing the grass to decrease. Eventually, the grasshoppers would die off after eating all of the grass.
300
Name two renewable resources?
geothermal, hydroelectric, solar, wind
400
How much work is done when a box is moved 10 meters using a force of 50 Newtons?
Work=Force x Distance Work= 50 N x 10 m Work= 500 Nm or 500 joules
400
What happens to light as it travels through a translusceny material?
The light is scattered. The image is blurred.
400
Why is it colder in the Northern Hemisphere during the winter?
The Northern Hemisphere is tilted away from the sun. As a result, the sun's rays are more spread out.
400
What is an adaptation of mammals living in an extremely cold climate?
hollow hair provides insulation
400
Where do volcanoes usually occur?
at plate boundaries
500
A machine makes work easier by changing at least one of three factors. Name the three factors.
changing the force, changing the direction, changing the distance
500
What forces are acting on a floating object?
gravity downward and bouyancy upward
500
What 2 factors act together to keep Earth in orbit around the sun?
inertia and gravity
500
Name three environmentally harmful activities of humans?
water pollutation, air pollution, deforestation, overpopulation,
500
What kind of plate boundary results in the formation of a trench?
converging plate boundary