Chemical Changes
WED
Water!
Succession
Earth & Space 7.9A
Earth & Space 7.9B
100
Which of the following would indicate a chemical reaction occurred? (7.6A #1)
A. Two substances are stirred together
B. Unexpected temperature increase
C. The color of a solution remains unchanged
D. A substance is dissolved into water
What is B. Unexpected temperature increase
100
Which is NOT an example of physical weathering? (7.8B #1 and #2)
A. ice movement
B. wind-blown sand
C. Rust
D. water
What is C. Rust?
100
A lake has been used for more than a century to irrigate crops. How has this practice likely affected this resource? (7.8C #1)
A. It decreased the salt content of the water
B. It increased the evaporation rate of the water
C. It increased the number of fish in the lake
D. It decreased the volume of the lake
What is D. It decreased the volume of the lake?
100
This process begins in a barren area with bare rock, later pioneer species convert rock into soil that will later support plants. The process described above is called-- (7.10C #1)
A. Primary succession
B. Secondary succession
C. Competition
D. Climax community
What is A. Primary succession?
100
The white swirling features in this satellite image indicate Earth's (7.9A #1)
A. atmosphere
B. high amount of gravity
C. magnetic field
D. sky ice crystals
What is A. atmosphere?
100
What is used to help reduce the negative effects of micro-gravity on the bodies of astronauts while in space? (7.9B #1)
A. Extra food
B. Fitness equipment
C. Rockets
D. Magnets
What is B. Fitness equipment?
200
A change that changes the chemical composition of a substance is called- (7.6A #2)
A. A physical change
B. An energy change
C. A chemical change
D. A major change
What is C. A chemical change?
200
Which of these factors have NO effect on how quickly sediment is deposited? (7.8B #3)
A. size of the sediment
B. color of the sediment
C. speed of the river
D. density of the sediment
What is B. color of the sediment?
200
Dumping toxic chemicals in a field near a water well can lead to… (7.8C #2)
A. Acid rain
B. Extreme soil erosion
C. Polluted groundwater
D. Algae blooms in the ocean
What is C. Polluted groundwater?
200
A forest fire burns the existing forest and grasses and small shrubs begin to appear a couple of weeks later. This is an example of-- (7.10C #2)
A. Primary Succession
B. Secondary Succession
C. Competition
D. Climax community
What is B. Secondary Succession?
200
Water is essential for life on Earth for all of the following reasons EXCEPT (7.9A #2)
A. circulates easily in various forms to different parts of Earth.
B. used for respiration & photosynthesis.
C. Helps maintain a moderate temperature.
D. it is what living organisms are made out of.
What is D. it is what living organisms are made out of?
200
What is not needed for safe space travel? (7.9B #2)
A. Music
B. Tools for repairs
C. Access to communication to those on Earth
D. food
What is A. Music?
300
Combining two clear liquids results in the formation of a yellow solid. What are two indicators of a chemical reaction in this situation? (7.6A #1)
A. Combination of of liquids & loss of mass
B. Unexpected color change & the formation of a precipitate
C. A release of gas & change in density
D. None of the above
What is B. Unexpected color change & the formation of a precipitate?
300
Particles of broken rock & soil being blown away by strong winds is an example of-- (7.8B #4)
A. Weathering
B. Deposition
C. Erosion
D. Competition
What is C. Erosion?
300
A city planner wants to build a drinking water facility in a site that will have access to water containing the lowest concentration of pollutants. What site would be the best place? (7.8C #3)
A. A site near the local golf course
B. A site downstream from a residential area
C. A site near feedlots housing livestock
D. A site downstream from a state forest
What is D. A site downstream from a state forest?
300
The last stage of ecological succession is- (7.10C #3)
A. primary succession
B. secondary succession
C. climax community
D. Competition
What is C. Climax Community?
300
What is the Goldilocks Zone? (7.9A #3)
A. The part of Earth that has great biodiversity
B. The habitable zone around a star where liquid water can exist
C. A densely populated area in the ocean
D. An ecosystem with an abundant amount of resources
What is B. The habitable zone around a star where liquid water can exist?
300
Which gas is provided in the atmosphere of the spacecraft & which gas is removed? (7.9B #3)
A. Oxygen is provided. Carbon dioxide is removed.
B. Carbon dioxide is provided. Oxygen is removed.
C. Carbon dioxide is provided. Nitrogen is removed.
D. Oxygen is provided. Nitrogen is removed.
What is A. Oxygen is provided. Carbon dioxide is removed?