Archaeologists can excavate ancient structures and burial sites and begin to infer how the people lived from fossils (like human remains) and artifacts (human-made items). Archaeologists can estimate the age of fossils and artifacts through several techniques.
This "Prehistoric" period — before writing and civilizations — is called the Stone Age and is extremely valuable to our understanding of our earliest hominid ancestors. Hominids comprise humans today, extinct ancestors, and apes that share similarities with humans.
C. Directions: Listen to the song in the given link, then answer the questions that follow. Sitsiritsit 1. How did you find the tempo? Was it fast, slow, or moderate? Why? 2. How did you find the melody? Was it high, low or just the right pitch for you? Explain 3. Can you identify remember what meter it has? Is it in duple or triple meter? 4. What is the texture of the song? Explain. 5. What do you think is the purpose of the song? Explain briefly.
Greenhouse gases are responsible for global warming because they trap heat that would otherwise escape from the atmosphere. Unlike oxygen and nitrogen, these gases can absorb radiation and hold onto heat. Greenhouse gases keep Earth at a temperature that can harbor life.