5 Written questions
5 Matching questions
- carbon, copper, helium, aluminum
- a type of pure substance in which atoms of two or more elements CHEMICALLY combine in a FIXED proportion
- b ability of a substance to be dissolved into another substance
- c How many elements occur naturally?
- d homogeneous mixture that appears to be a simgle substance, but is composed of particles of two or more substances that are distributed evenly amongst each other. What is another name for liquid homogeneous mixtures.
- e Name two elements.
5 Multiple choice questions
- ability of a substance to flow like a liquid
- ability of a substance to be pounded into thin sheets
- Explain how the properties of elements compare to properties of a compound the elements make up.
- mixture in which particles are larger than those in a solution but are NOT heavy enough to settle out. Which type of mixture has solute small enough, so it can't be filtered out?
- a change in size, shape, or state of matter by adding or removing energy. Which type of change keeps the identity the same? Which type of change is easy to undo, because the identity has NOT been changed?
5 True/False questions
law of conservation of mass → Matter is neither created nor destroyed during a change, but is simply changed from one form to another form
by chemical processes ONLY → any characteristic of a material that you can observe or measure without changing the IDENTITY of the material
Physical change - rocks are broken into smaller/different pieces, but they are still rocks; chemical change - substances dissolve in water and react with other substances in the soil, air, or water making new substances → Explain how the law of conservation of mass applies to a chemical change.
sifting, magnetism, distillation, centrifuge, physical removal, filtration → Name two compounds.
chemical change → How can mixtures be separated?