Please go over my answers and tell me what I got wrong... Telling me the correct answer would also be nice please hurry I only have 20 mins
What does the principle of uniformitarianism tell us about the past? (Points: 5)
The past is the key to the future.
X The present is the key to the past.
Processes at work in the past were very different than those at work today.
The past has no bearing on the future or present.
2. The Pacific Ocean is shrinking while the Atlantic Ocean is expanding. Which type of plate boundary must be involved in each location? (Points: 5)
Pacific Ocean, convergent; Atlantic Ocean, divergent
Pacific Ocean, transform; Atlantic Ocean, convergent
Pacific Ocean, convergent; Atlantic Ocean, transform
X Pacific Ocean, divergent; Atlantic Ocean, transform
3. The theory of plate tectonics explains the movement of the plates by convection cells in which of the following layers? (Points: 5)
upper mantle
X mantle
outer core
crust
4. Which of the following may occur at a transform plate boundary? (Points: 5)
X earthquakes
volcanoes
mountain building
formation of new oceanic crust
5. Earthquakes are detected by which of the following? (Points: 5)
global positioning system
X seismograph
Richter scale
tiltmeter
6. Which of the following statements about S waves is true? (Points: 5)
S waves travel through solids, liquids, and gases.
S waves arrive at a seismograph station first.
X S waves are also called secondary waves.
S waves move in a pulsating motion.
7. Why is coal not a mineral? (Points: 5)
It does not occur naturally.
It does not have a regular composition.
X It is organic.
It is not a solid.
8. In a laboratory, you scratch an unknown mineral on a piece of unglazed porcelain. Which property are you trying to determine? (Points: 5)
fracture
color
luster
X streak
9. Which of the following best describes an igneous rock that formed from cooling lava? (Points: 5)
without grains
foliated
stratified
X fine grained
10. Sedimentary rocks that form from evaporating seawater are classified as __________. (Points: 5)
clastic
X chemical
organic
fossiliferous
11. How do metamorphic rocks form? (Points: 5)
cooling of magma
X change due to heat and pressure
evaporation of seawater
weathering and erosion due to water
12. Which of the following is an example of chemical weathering? (Points: 5)
Freezing and thawing rainwater widens a crack in a sidewalk.
A growing tree root splits a boulder in two.
A stream rounds and smoothes rocks into pebbles.
X Acid rain discolors and disfigures a limestone statue.
14. The sun’s energy hits earth’s surface at the most direct angle at which of the following locations? (Points: 5)
equator
North Pole
South Pole
X 30° N or S latitude
15. Why does temperature increase with altitude through the stratosphere? (Points: 5)
X The air molecules are closer together in the upper stratosphere.
The stratosphere is closest to the sun.
The ozone layer is found in the stratosphere.
All layers of the atmosphere increase in temperature with altitude.
16. Which gas is the most abundant in earth’s current atmosphere? (Points: 5)
carbon dioxide
oxygen
X nitrogen
hydrogen
17. Which of the following was a major source of atmospheric oxygen? (Points: 5)
outgassing
X photosynthesis
decomposition of water
volcanic eruptions
18. What does a barometer measure? (Points: 5)
temperature
wind speed
X atmospheric pressure
air density
19. If heat energy is transferred from direct contact between a warm object and a cold object, it has been transferred by __________. (Points: 5)
radiation
conduction
X convection
the sun
20. What causes the Coriolis effect? (Points: 5)
X earth’s rotation
gravity
radiation from the sun
earth’s revolution
21. The flow of air from land to a body of water is called a(n) __________. (Points: 5)
X sea breeze
summer monsoon
land breeze
air current
22. Which of the following statements is most accurate? (Points: 5)
Warm air sinks.
Warm air exerts more pressure on the land than cold air.
X Warm air is less dense than cold air.
Warm air is denser than cold air.
23. Which of the following best describes the thermosphere? (Points: 5)
Heavier gases such as hydrogen and helium stay at the bottom of the thermosphere.
The atmosphere is so thin that gas molecules rarely contact each other.
X Lighter gases such as nitrogen and oxygen rise to the top of the thermosphere.
The thermosphere sits directly below the troposphere.
24. Tomorrow will be sunny with high clouds. What does this statement describe? (Points: 5)
X the weather
the climate
air circulation
jet streams
25. Which of the following is one of the defining features of a hurricane? (Points: 5)
funnel cloud
low pressure
X high pressure
rapid snowfall
what THE 2010?!?!?!??!?
What causes wind formation?
Sure! Here are the answers to the questions you got wrong:
1. The principle of uniformitarianism tells us that the correct answer is "The present is the key to the past." This means that the processes and events we observe today can be used to understand and interpret past geological events.
2. The correct answer is "Pacific Ocean, divergent; Atlantic Ocean, transform." This means that the Pacific Ocean is experiencing seafloor spreading at a divergent plate boundary, while the Atlantic Ocean is experiencing plate boundary that involves transform faulting.
3. The correct answer is "mantle." The theory of plate tectonics explains the movement of the plates by convection cells in the mantle.
4. The correct answer is "earthquakes." Transform plate boundaries are characterized by large amounts of earthquakes but not volcanoes or mountain building.
7. The correct answer is "It is organic." Coal is formed from the remains of plant material and is therefore considered organic, not a mineral.
8. The correct answer is "streak." Testing the streak of a mineral involves scratching it on a piece of unglazed porcelain to see the color of the powder left behind.
9. The correct answer is "fine grained." Igneous rocks formed from cooling lava tend to have small, fine-grained crystals.
10. The correct answer is "chemical." Sedimentary rocks that form from evaporating seawater are classified as chemical rocks.
11. The correct answer is "change due to heat and pressure." Metamorphic rocks form when existing rocks undergo changes in temperature and pressure, resulting in a transformation of the rock's mineral composition and texture.
12. The correct answer is "Acid rain discolors and disfigures a limestone statue." Chemical weathering refers to the breakdown of rocks and minerals caused by chemical reactions. In this case, acid rain is causing a chemical reaction on the limestone statue.
14. The correct answer is "30° N or S latitude." The sun's energy hits the Earth's surface at the most direct angle at these latitudes, resulting in higher temperatures.
15. The correct answer is "The air molecules are closer together in the upper stratosphere." The increase in temperature with altitude in the stratosphere is due to the higher concentration of ozone molecules, which absorb and re-radiate solar energy.
16. The correct answer is "nitrogen." Nitrogen is the most abundant gas in Earth's current atmosphere, making up about 78% of the total composition.
17. The correct answer is "photosynthesis." Photosynthesis by plants and other photosynthetic organisms released oxygen into the atmosphere over billions of years, resulting in the significant increase of atmospheric oxygen.
18. The correct answer is "atmospheric pressure." A barometer is a device used to measure atmospheric pressure.
19. The correct answer is "convection." When heat is transferred by direct contact between a warm object and a cold object, it is transferred through conduction.
20. The correct answer is "Earth's rotation." The Coriolis effect is caused by the rotation of the Earth, which causes moving air or water to be deflected to the right in the Northern Hemisphere and to the left in the Southern Hemisphere.
21. The correct answer is "sea breeze." Sea breeze refers to the flow of air from land to a body of water during the day as a result of differential heating between land and water.
22. The correct answer is "Warm air is less dense than cold air." Warmer air molecules have more energy and are spread out, making them less dense than cooler air molecules.
23. The correct answer is "Lighter gases such as nitrogen and oxygen rise to the top of the thermosphere." The thermosphere is the uppermost layer of the atmosphere where lighter gases are found.
24. The correct answer is "the weather." The statement describes the conditions expected for tomorrow, which is a part of the weather forecast.
25. The correct answer is "high pressure." Hurricanes are characterized by low-pressure systems, not high-pressure systems.
I hope this helps!
i have no freaking clue im 11 and i need help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
please?