Chapter : Time and Motion
Time and Motion Q: How do we determine the speed of a moving object? A: Vehicles such as cars, buses, scooters and bikes have devices that measure the speed of the vehicle and the distance covered by it. Speed of the vehicle is measured by a device called the speedometer. The speedometer shows the speed […]
Chapter 7 :- Transportation in Animals and Plants Question and Answers
Science Matters class 7 Q: What is the act of voluntarily giving blood called? A: Blood donation. Q: Amoeba do not have well-defined excretory systems. By which process do they get rid of body wastes? A: Unicellular organisms such as amoeba, paramecium, hydra etc. do not have a well-developed excretory system. They get rid of […]