Mixtures Quiz For Grade 7 Student

The correct answer is "Two or more substances mixed together." This is because a mixture is a combination of two or more substances that are physically combined but can be separated through physical means, such as filtration or evaporation. Unlike a pure substance, which consists of only one type of particle, a mixture contains different types of particles that retain their individual properties. Therefore, the answer accurately describes the nature of a mixture.

table salt is smaller than rock salt. Since they are the same substance (salt), the only difference is the size of the particle. From your experiment with powdered sugar and the sugar cube, you know that smaller particle sizes dissolve faster than larger particle sizes.

To separate a mixture of sand and iron, the easiest method is to use a magnet. Since iron is magnetic, the magnet will attract the iron particles, allowing them to be easily separated from the sand. This method is efficient and does not require any additional equipment or chemicals. By using a magnet, the iron can be quickly and effectively isolated from the mixture, resulting in a successful separation process.

A solution is a homogeneous mixture composed of at least two parts: solute and solvent. The solute is the substance that gets dissolved in the solvent, while the solvent is the substance that does the dissolving. In other words, the solute is the component that is present in a smaller amount and is being dissolved, while the solvent is the component that is present in a larger amount and does the dissolving. Therefore, the correct answer is "solute and solvent."

The correct answer is that homogeneous mixtures look the same throughout, while heterogeneous mixtures allow you to see the different parts. This explanation highlights the key difference between the two types of mixtures based on their visual characteristics. In a homogeneous mixture, the substances are uniformly distributed and cannot be visually distinguished, whereas in a heterogeneous mixture, the substances are not evenly mixed and can be observed as separate components.

Homogeneous refers to a substance that has a uniform composition throughout. A solution is a type of homogeneous mixture where one substance, called the solute, is dissolved in another substance, called the solvent. Therefore, solution is another name for homogeneous because it describes a mixture that is uniform in composition. Solvent, solute, and saline are not synonymous with homogeneous, as they refer to specific components or types of mixtures.

When you try to make a solution of salt and oil, it becomes a heterogeneous mixture because salt does not dissolve into oil. This is because salt is soluble in water but not in oil. Therefore, the salt particles remain separate from the oil particles, resulting in a mixture where the salt can be seen as separate particles floating in the oil.

the salt will dissolve in the water, pepper will not. It is too hard to separate the salt and pepper because they are both so small.

both stirring and adding heat will help the salt dissolve faster. Letting it sit, the salt would eventually dissolve, but it would be slower. Adding more salt would only mean there is more salt to dissolve.

Mechanical mixtures are combinations of substances that can be easily separated by physical means. In the given options, both the chocolate bar with almonds and orange juice with pulp are mechanical mixtures. In the chocolate bar with almonds, the almonds can be easily separated from the chocolate. Similarly, in orange juice with pulp, the pulp can be separated from the juice. On the other hand, chocolate milk and flat pop are not mechanical mixtures as they are homogeneous mixtures where the components are evenly distributed and cannot be easily separated.

Homogeneous mixtures are those in which the components are evenly distributed throughout the mixture, resulting in a uniform appearance and composition. Water and shampoo are examples of homogeneous mixtures because their components (water and various chemicals) are evenly mixed together, resulting in a uniform solution. On the other hand, rocky road ice cream and oatmeal are not homogeneous mixtures because they contain distinct components that are not evenly distributed throughout the mixture.