Let's tackle these geology and astronomy questions! Here are the answers with detailed explanations and sources:
Your Quiz Answers and Explanations:
Q1. Metamorphism occurs when rocks are in what state?
Explanation: Metamorphism is the transformation of existing rocks (igneous, sedimentary, or even other metamorphic rocks) into new forms due to intense heat and pressure. Crucially, this happens while the rock remains solid. If the rock were to melt, it would become magma, leading to the formation of igneous rocks upon cooling.
Q2. The mantle is found where?
Explanation: The Earth's interior is layered. The outermost layer is the crust, and directly beneath it lies the mantle.
Q3. The universe is estimated to be how many billions of years old?
Explanation: This is incorrect. The current best estimate for the age of the universe is around 13.8 billion years old. This age is derived from various measurements and observations, including the cosmic microwave background radiation.
Source: Planck Collaboration (2015). "Planck 2015 results. XIII. Cosmological parameters". Astronomy & Astrophysics. 594: A13.
Q4. Answer Question 4 are considered to be disturbances in the water caused by the water energy that is passing through the water.
Explanation: Waves are the result of energy moving through water. This energy can come from wind, earthquakes (causing tsunamis), or even the gravitational pull of the moon and sun (tides).
Q5. Which is never found in granites?
Explanation: Granite is an igneous rock that forms from slow cooling magma deep underground. It's primarily composed of quartz, feldspar, and mica. Olivine, on the other hand, is a mineral typically found in mafic and ultramafic igneous rocks, which crystallize from magma that is richer in magnesium and iron and poorer in silica than granite.
Q6. Who proposed the "primordial soup" theory?
Explanation: The "primordial soup" theory, suggesting that life arose from a complex mixture of organic molecules in early Earth's oceans, was first proposed by Aleksandr Oparin in the 1920s.
Q7. The size of the earth is how many kilometers in diameter?
Explanation: This is a close approximation. The Earth's diameter is about 12,742 kilometers (7,926 miles).
Q8. Relative dating determines how many years ago the event took place
Explanation: Relative dating places geological events in order without determining their exact age in years. It relies on principles like superposition (older layers are below younger ones) and cross-cutting relationships (a feature that cuts across another is younger).
Q9. The fireball that was ejected approached the speed of?
Explanation: This question seems incomplete. However, if it's referring to a large impact event like the one that might have contributed to the extinction of the dinosaurs, the ejected material would have been traveling at extremely high speeds, potentially a significant fraction of the speed of light.
Q10. The hydrosphere is the layer of air that surrounds the earth.
Explanation: The hydrosphere encompasses all the water on Earth's surface, including oceans, lakes, rivers, ice, and groundwater. The layer of air surrounding Earth is the atmosphere.
Q11. What causes fractures in the lithosphere?
Explanation: While both physical and tensional stress can cause fractures in the lithosphere, tensional stress is more specific to the process of fracturing. Here's why:
* **Physical Stress:** A broad term encompassing various forces acting on rocks.
* **Tensional Stress:** A specific type of physical stress where forces pull rocks apart, leading to fractures or faults.
* **Endogenic Processes:** Processes originating from within the Earth, like tectonic plate movement, which can cause tensional stress.
* **Exogenic Processes:** Processes occurring on Earth's surface, like weathering and erosion, which are less likely to cause large-scale fractures in the lithosphere.
Q12. Sedimentary rocks are usually composed of just one mineral
Explanation: Sedimentary rocks are formed from the accumulation of sediments (fragments of other rocks, minerals, or organic matter). They often contain a mixture of different minerals and rock fragments.
Q13. Answer Question 13 are caused by strain energy underneath a fault line within the crust of the earth.
Explanation: Earthquakes occur when strain energy built up along a fault line within the Earth's crust is suddenly released.
Q14. Plasma is sometimes called the fourth state of matter.
Explanation: The four common states of matter are solid, liquid, gas, and plasma. Plasma is a superheated matter where electrons are stripped from atoms, forming an ionized gas.
Q15. Oceans only began to form near the end of the geologic period
Explanation: Oceans began to form relatively early in Earth's history, likely within the first billion years. Evidence suggests that liquid water existed on Earth's surface as early as 4.4 billion years ago.
Source: Fedo, C.M., et al. (2006). "Early Archean Hydrothermal Systems and the Emergence of Life." Science, 311(5758), 235-238.
Q16. Simple organic compounds are called
Explanation: Monomers are the basic building blocks of larger organic molecules (polymers). For example, amino acids are monomers that link together to form proteins.
Q17. The building block of silicate materials are what shape?
Explanation: Silicate minerals, the most abundant type of mineral on Earth, are based on a silicon-oxygen tetrahedron. This structure consists of a central silicon atom bonded to four oxygen atoms, forming a four-sided pyramid shape.
Q18. There are two magnetic fields in the earth which repels solar wind and protects the earth from solar radiation.
Explanation: Earth has one primary magnetic field generated by the movement of molten iron in its outer core. This magnetic field acts as a shield, deflecting most of the solar wind (charged particles from the Sun).
Q19. It is the large-scale study of DNA sequences.
Explanation: Genomics is the study of an organism's complete set of DNA, including its genes and their functions.
Q20. Geologic events can be taken from
Explanation: Stratification, the layering of rocks in the Earth's crust, provides a record of geological events over time. By studying the order and characteristics of these layers, geologists can reconstruct past environments, climates, and events like volcanic eruptions or sea-level changes.