This document appears to be a science worksheet for primary grade 5 students. It contains questions about light, energy, magnets, mixtures, ecosystems, and relationships between living things. The questions are multiple choice and completion type where students are asked to provide scientific terms. Key topics covered include the nature of light, reflection, refraction, the electromagnetic spectrum, properties of magnets, types of mixtures and how to separate them, components of an ecosystem, and different relationships between organisms like predation, competition, and symbiosis.