Question

1. a magnet was placed near a pile that contained both iron and aluminum. the magnet was moved gradually closer to the pile. as it neared the pile, the magnet started attracting small pieces of steel from the pile. based on evidence in the image, which of these statements best describes the contents of the pile? it is a solution of aluminum and steel that can be separated by magnetism it is a heterogenous mixture of aluminum and steel that can be separated by magnetism the is a compound of aluminum and steel that can be separated by magnetism it is a suspension of aluminum and steel that can be separated by magnetism name: date period pure substances & mixtures quiz 7. what do elements, compounds, and mixtures have in common? they are all made up of atoms they can all be broken down by physical changes they are all made up of pure substances they are all found on the periodic table 8. a is a type of heterogeneous mixture in which the particles of a material are too large to stay mixed without being shaken or stirred. an example of this type of mixture can be seen in a snow globe. solution suspension colloid compound 9. a sample of matter, either in a single element or compound, that has definite physical and chemical properties are called. mixtures compounds pure substances solutions 10. all of the following are homogeneous mixtures except for which: chocolate milkshake salad with tomatoes, cheese and croutons saltwater freshly mixed lemonade

Explanation:

• Question 6:
• A heterogeneous mixture has visibly different parts. Since the pile has iron (steel is an alloy of iron) and aluminum, and they can be separated by magnetism (magnet attracts iron/steel but not aluminum), it is a heterogeneous mixture. A solution is a homogeneous mixture at the molecular level. A compound is a pure substance formed by chemical combination. A suspension is a type of heterogeneous mixture but the key here is the general concept of heterogeneous mixture for two distinct metals.
• Question 7:
• Elements, compounds, and mixtures are all made up of atoms. Compounds and mixtures can't be broken down by physical changes (compounds need chemical changes). Mixtures are not pure substances. Only elements are on the periodic table.
• Question 8:
• A suspension has large particles that settle out without stirring (like in a snow globe). A solution has particles dissolved at molecular level. A colloid has particles that don't settle easily. A compound is a pure substance.
• Question 9:
• A pure substance (either element or compound) has definite physical and chemical properties. Mixtures have variable properties. Compounds are a type of pure substance but the term that includes both elements and compounds is pure substances. Solutions are mixtures.
• Question 10:
• A homogeneous mixture has a uniform composition. A salad with tomatoes, cheese, and croutons has visibly different parts (heterogeneous). Chocolate milkshake (after blending well, can be considered homogeneous in a practical sense for this context), saltwater, and freshly mixed lemonade (assuming well - mixed) are homogeneous.

Answer:

• Question 6: It is a heterogenous mixture of aluminum and steel that can be separated by magnetism
• Question 7: They are all made up of atoms
• Question 8: suspension
• Question 9: Pure Substances
• Question 10: salad with tomatoes, cheese and croutons