What tool do you use to view the cells?

1. Uses of mirrors: Plane mirror is used in: Periscope Kaleidoscope Rear-view mirrors in vehicles Answer: (iv) All Convex mirror is used by shopkeepers as it gives a wide field of view. Concave mirror is used in solar cookers as it converges sunlight to a point. 2. Fill in the blanks: The liquid part of blood is called plasma. Digestion begins in the mouth. A convex lens is used in a camera. Plants that make their own food are called autotrophs. Heterotrophs depend on autotrophs for food. Saprotrophs feed on dead and decaying matter. 3. Answer the following: Step 1: Differentiate between real and virtual image. Real image: Formed when light rays actually meet or converge. Can be caught on a screen. Always inverted. Virtual image: Formed when light rays appear to meet (diverge). Cannot be caught on a screen. Erect (same side as object). Step 2: What is a battery? A battery is a device that stores chemical energy and converts it into electrical energy through electrochemical reactions. Step 3: Define refraction of light. Refraction of light is the bending of a light ray as it passes from one transparent medium to another due to change in its speed.