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Question 1: What do we call a large body of salt water that covers most of Earth's surface?
- Pond
- Lake
- Ocean
- River
Answer: C. Ocean
Explanation: An ocean is a vast body of salt water that covers the majority of the Earth's surface, distinguishing it from smaller freshwater bodies.
Question 2: Which layer of the Earth is known for being the thinnest and coolest outer layer?
- Atmosphere
- Mantle
- Crust
- Core
Answer: C. Crust
Explanation: The Earth is composed of several layers, and the crust is the thin, outermost solid shell where all living things reside.
Question 3: What is the process that breaks rocks down into smaller pieces?
- Melting
- Erosion
- Freezing
- Weathering
Answer: D. Weathering
Explanation: Igneous rocks are formed when hot, molten rock called magma or lava cools down and hardens into a solid state over time.
Question 4: What is the name for the movement of weathered rock or soil by water, wind, or ice?
- Weathering
- Evaporation
- Erosion
- Deposition
Answer: C. Erosion
Explanation: Weathering is the natural process that breaks down large rocks into smaller pieces like sand and soil through wind, water, and ice.
Question 5: Which layer of the Earth is the deepest, hottest, and made mostly of iron and nickel?
- Core
- Surface
- Crust
- Mantle
Answer: A. Core
Explanation: The water cycle describes how water moves continuously between the Earth's surface and the atmosphere through evaporation, condensation, and precipitation processes.
Question 6: What are solid, nonliving substances found in nature that build rocks?
- Soil
- Plants
- Water
- Minerals
Answer: D. Minerals
Explanation: Fossils are the preserved remains or traces of ancient plants and animals that lived on Earth a very long time ago.
Question 7: What is a nonliving material made of one or more minerals?
- Clay
- Soil
- Sand
- Rock
Answer: D. Rock
Explanation: A rock is a solid, nonliving material found in nature that is composed of one or more minerals grouped together in the ground.
Question 8: What is soil made of?
- Weathered rocks and organic material
- Only water
- Only sand
- Only plastic
Answer: A. Weathered rocks and organic material
Explanation: Soil is a mixture of tiny rock particles, minerals, and decayed plant or animal matter that provides nutrients for plants to grow.
Question 9: What is the term for a natural feature of the land, such as a mountain or valley?
- Planet
- Ocean
- Continent
- Landform
Answer: D. Landform
Explanation: A landform is any natural feature found on the Earth's surface, such as a mountain, valley, plain, or plateau, shaped by nature.
Question 10: How does water move through the crust, oceans, and atmosphere?
- The rock cycle
- The soil cycle
- The wind cycle
- The water cycle
Answer: D. The water cycle
Explanation: The core is the very center of the Earth, which is extremely hot and made mostly of heavy metals like iron and nickel.