Hydrosphere
Where is most of Earth’s freshwater located?
A in the clouds
B in the ice caps
C in the ocean
D in the ground
B in the ice caps
Which chemical equation best represents the Law of Conservation of Mass?
A H + O → H2O
B H2 + O2 → H2O
C 2H2 + O2 → 2H2O
D H2 + O2 → 2H2O2
C 2H2 + O2 → 2H2O
Which is a nonrenewable resource?
A oil
B sunlight
C water
D wood
A oil
How has genetic engineering helped farming?
A by developing better fertilizer for crops
B by creating crops that resist some diseases
C by producing soil that makes crops grow better
D by producing faster ways to harvest crops
B by creating crops that resist some diseases
Which evidence supports the idea that life on Earth has continually evolved?
A evidence from layers of tree rings
B evidence from rock layers, fossils, and ice cores
B evidence from rock layers, fossils, and ice cores
Which device is used to determine the volume of a liquid?
A anemometer
B graduated cylinder
C test tube
D thermometer
B graduated cylinder
Which is a compound?
A sodium
B sugar
C nitrogen
D air
B sugar
Which would indicate the water in a lake is not safe for drinking?
A many varieties of fish in the lake
B high dissolved-oxygen levels in the lake
C cold water temperature of the lake
D high turbidity levels in the lake
D high turbidity levels in the lake
In some environments, wolves prey on deer for their source of food. If all of the wolves were taken from the environment, what would most likely happen to the deer population?
The deer population would increase and begin to compete for food
A geologist identifies the identical index fossils in rock layers from two different areas. Which conclusion is best supported by this discovery?
The two rock layers were deposited at approximately the same time
Explain why all of the Earth’s freshwater is not available for human use.
Most of Earth’s freshwater is frozen water.
Two different liquids are poured together in an open container. Bubbles begin to form. After the bubbling stops, it is determined that the total weight of the two liquids is less than before they were poured together. Which best describes this observation?
Some of the atoms during the reaction escaped into the air.
What would have the greatest long-term impact on reducing the amount of carbon dioxide in the air?
A planting trees around a farm
B cutting down trees around a farm
C increasing the number of livestock on a farm
D decreasing the number of livestock on a farm
A planting trees around a farm
Which would most likely increase the genetic variation in a population of organisms?
A increase in diseases
B decrease in diseases
C increase in mutations
D decrease in mutations
C increase in mutations
Which is the most accurate method scientists use to predict the age of Earth?
A relative dating of rock layers
B radioactive dating of rocks
C comparing the ages of different fossils
D investigating core samples from the Arctic
B radioactive dating of rocks
What effect does the water cycle have on the total amount of water on Earth?
A The total amount of water on Earth is constantly increasing.
B The total amount of water on Earth remains relatively constant
B The total amount of water on Earth remains relatively constant
Explain the law of Conservation of Mass.
matter can be neither created nor destroyed
Which are most responsible for creating acid rain pollution?
A nuclear power plants
B coal-burning power plants
C hydroelectric power plants
D wood-burning power plants
B coal-burning power plants
How are mutualism and parasitism different?
Both organisms benefit in mutualism, while in parasitism only one organism benefits at the other’s expense.
Which allows scientists to investigate what Earth’s climate was like over the past 740,000 years?
A volcanic deposits
B fossils
C faults
D ice cores
D ice cores
Which is the primary source of energy for most cells in the body?
A sugar
B fat
C protein
D vitamin
A sugar
Which best describes a method of obtaining energy that may cause changes in water temperature and harm to fish populations?
A burning coal
B using ethanol in cars
C installing solar panels on a home
D generating electricity in a hydroelectric power plant
A burning coal
Recent changes in species can be found in the upper layers of rock. This provides a link between which two scientific ideas?
A cell theory and the theory of evolution theory
B the theory of evolution and the Law of Superposition
B the theory of evolution and the Law of Superposition