Chemistry
Space
Physics
Ecology
Mr. P's Choice
100
This picture represents H2O (water). What do the circles represent?
Atoms
100
The most common element found in our sun
Hydrogen
100
Which two simple machines are being used to enable this student to reach the door?
Wheel and Axle and Inclined Plane
100
A form of symbiosis where both organisms benefit
Mutualism
100
What is an unintended negative effect that long-term pesticide use can have on the targeted environment?
A. The amount of food the pests need to survive will be reduced.
B. The pests that survive can develop resistance to the pesticides.
C. The number of animals that compete for resources with the pests can increase.
D. The amount of pesticide needed to eliminate the pests will be reduced over time.
B. The pests that survive can develop resistance to the pesticides.
200
This action forms a different chemical substance.
1. crushing a rock
2. burning a piece of wood
3. mixing salt and pepper
4. melting an ice cube
2. Burning a piece of wood
200
Approximately how long does it take earth to move from position A to position B.
1 year
6 months
1 day
12 hours
6 months
200
At which position does the boulder have the greatest kinetic energy?
A
B
C
D
B
200
What happens to the amount of energy as it moves up a food pyramid?
It decreases
200
Many bird species in Pennsylvania, such as the bluebird and golden-winged warbler, thrive in younger forests and open spaces. How would timber harvesting most likely affect the sustainability of these bird species?
A. It would increase the number of favorable habitats.
B. It would reduce the number of edible insect species.
C. It would produce forests that contain mostly mature trees.
D. It would remove debris that provides protection from predators.
A. It would increase the number of favorable habitats
300
This is an example of a physical change
1. Wood burning
2. iron rusting
3. ice melting
4. milk souring
3. ice melting
300
The gravitational force between the Moon and Earth depends on
(1) their masses, only
(2) their diameters, only
(3) their masses and how far apart they are
(4) their diameters and how far apart they are
(3) their masses and how far apart they are
300
This form of energy depends on the position of the object
Gravitational
300
This is an example: Fleas on a dog
Parasitism
300
This is equivalent to 93million miles or 149,597,870,700 meters
1 Astronomical Unit (1 AU)
400
When carbon and oxygen combine chemically, the mass of the product is...
1. greater than the mass of the carbon plus the mass of the oxygen
2. equal to the mass of the carbon plus the mass of the oxygen
3. equal to the mass of the carbon
4. less than the mass of the carbon
2. equal to the mass of the carbon plus the mass of the oxygen
400
What phase of the moon is this?
Waxing Gibbous
400
The hammer is being used as which type of simple machine?
wheel and axle
inclined plane
lever
pulley
lever
400
Which energy transfer most likely occurs between organisms in the food web?
from owl to fox
from rabbit to fox
from sparrow to grass
from mouse to grasshopper
from rabbit to fox
400
Which statement best explains why a food web more completely represents the flow of energy through an ecosystem than a food chain does?
A. Most ecosystems have too many organisms to fit into a food chain.
B. More energy flows through most ecosystems than a single food chain can show.
C. Relationships between organisms usually change quickly enough to make food chains inaccurate.
D. There are more relationships between organisms than can be shown in a single food chain.
D. There are more relationships between organisms than can be shown in a single food chain.
500
During which phase change is heat energy absorbed by a substance?
1. liquid to gas
2. gas to solid
3. liquid to solid
4. gas to liquid
1. liquid to gas
this is the only time when something heats up. All others cool off
500
Order these planets based on their gravity (highest to lowest)
Venus
Earth
Mars
Saturn
Saturn, Earth, Venus, Mars
500
This is a machine that assists in lifting objects up. Usually by pulling a rope on the other end
A pulley
500
organisms of the same species living in a community
Population
500
This keeps the range of temperatures on Earth from going to extremes
Earth's Atmosphere