Science Grade 8 Chapter 1 Introduction to Matter Essay Questions
Give an example of a mixture that is a solution and a mixture that is not a solution. Which mixture is heterogeneous? Explain.
*Solution-air (nitrogen and gases), sugar water (Heterogeneous) Can't see or pick apart. *Not- salad (lettuce, vegetables), soil (Homogeneous) You can see and easily pick apart.
Heating table sugar until it becomes caramel is an example of a chemical change. Compare and contrast the two types: chemical and physical change.
They are both the same because they both change in some way, however, a physical change is still the same substance after it undergoes change, but a chemical change produces new substances with different properties from those of the original substances.
Explain the energy transformation when a person pushes a bike to the top of a hill and coasts down.
When you push a bike up a hill, the chemical energy from the food you ate is being transformed into kinetic energy of your moving muscles, but also potential energy is being transformed into kinetic energy as you walk up and begin to cast down the hill.
