Q: Q: Einstein developed a theory about how electromagnetic radiation can behave as both a wave and what else? Read this paragraph and choose the correct option from the provided answers: In 1905, the physicist Albert Einstein developed a new theory about electromagnetic radiation. The theory is often called the wave-particle theory . It explains how electromagnetic radiation can behave as both a wave and a particle. Einstein argued that when an electron returns to a lower energy level and gives off electromagnetic energy, the energy is released as a discrete "packet" of energy. We now call such a packet of energy a photon . According to Einstein, a photon resembles a particle but moves like a wave. You can see this in the Figure below . The theory posits that waves of photons traveling through space or matter make up electromagnetic radiation. Choices: - energy - bacteria - sound - particle A:
A: particle

Q: Q: Vascular tissue allowed these plants to do what? Read this paragraph and choose the correct option from the provided answers: Seedless vascular plants evolved to have vascular tissue after the nonvascular plants but do not have seeds. Examples include the ferns, whisk ferns, club mosses, and horsetails. Vascular tissue allowed these plants to grow taller. Choices: - grow smaller - have more flowers - live shorter - grow taller A:
A: grow taller

Q: Q: What are the extremely small particles that comprise all matter? Read this paragraph and choose the correct option from the provided answers: All matter is composed of extremely small particles called atoms. Choices: - ions - protons - electrons - atoms A:
A: atoms

Q: Q: What part of the cell in plants and algae does photosynthesis take place? Read this paragraph and choose the correct option from the provided answers: organelle in the cells of plants and algae where photosynthesis takes place. Choices: - mitochondria - fibers - cell wall - organelles A:
A: organelles