Final answer:
A cup of tea and sugar is a homogeneous mixture, while a bucket full of sand and gravel is a heterogeneous mixture. Food coloring dissolved in water is a homogeneous mixture, and peanuts and almonds mixed together in a bowl is a heterogeneous mixture.
Step-by-step explanation:
A cup of tea and sugar in a cup would be considered a homogeneous mixture. The tea and sugar are thoroughly mixed, and the composition is constant throughout the mixture. A bucket full of sand and gravel would be considered a heterogeneous mixture. The sand and gravel components can be visually differentiated and have different compositions within the mixture. Food coloring dissolved in water would be considered a homogeneous mixture as the food coloring molecules are evenly distributed throughout the water. Lastly, peanuts and almonds mixed together in a bowl would also be considered a heterogeneous mixture as you can visually differentiate between the different nuts in the mixture.