QuestionMay 14, 2025

19. Why does Earth have seasons, and what causes them to change? 20. Find an endangered animal and explain why it's at risk. 21. What is a fossil, and how does it form over time?

19. Why does Earth have seasons, and what causes them to change? 20. Find an endangered animal and explain why it's at risk. 21. What is a fossil, and how does it form over time?
19. Why does Earth have seasons, and what causes them to change? 20. Find an endangered animal and explain why it's at risk. 21. What is a fossil, and how does it form over time?

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Answer

1. Earth's Tilt ### Earth has seasons due to its axial tilt of approximately 23.5 degrees. This tilt causes different parts of Earth to receive varying amounts of sunlight throughout the year. ## Step2: Orbit Around the Sun ### As Earth orbits the Sun, the tilt results in one hemisphere being tilted towards the Sun (experiencing summer) while the other is tilted away (experiencing winter). ## Step3: Seasonal Changes ### The change in sunlight angle and duration leads to temperature variations, causing seasonal changes. # Answer: ### Earth's seasons are caused by its axial tilt and orbit around the Sun. --- # Explanation: ## Step1: Identify an Endangered Animal ### The Amur Leopard is critically endangered. ## Step2: Reasons for Risk ### It is at risk due to habitat loss, poaching, and prey depletion. # Answer: ### The Amur Leopard is endangered due to habitat loss, poaching, and prey depletion. --- # Explanation: ## Step1: Definition of a Fossil ### A fossil is the preserved remains or impression of a once-living organism. ## Step2: Formation Process ### Fossils form when organisms are buried by sediment. Over time, minerals replace organic material, preserving the shape. # Answer: ### A fossil is a preserved remain or impression formed when organisms are buried by sediment and mineralized over time.
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