2 Fatima is trying to separate a mixture of iron filings and sulfur powder. She uses a magnet to attract the iron filings. This mixture is considered: A A compound B A homogeneous mixture C A heterogeneous mixture D A solution
3 An unsaturated solution contains: A Maximum solute B No solvent C Less solute than maximum amount D Solid solute at bottom
4 Chloe is mixing oil and water. After shaking, she notices that tiny droplets of oil are dispersed throughout the water but they do not settle out easily. This mixture is best classified as: A Solution B Colloid C Suspension D Compound
5 Concentration of a solution means: A Color of solution B Amount of solvent only C Amount of solute in given solvent D Temperature of solution
6 Xia is making a solution of iodine in alcohol (tincture of iodine). She knows that iodine is the solute and alcohol is the solvent. What type of solution is this based on the states of solute and solvent? A Solid in liquid B Liquid in liquid C Gas in liquid D Solid in solid
7 Quinn is studying the properties of diamond. He knows diamond is the hardest natural material. Which property of diamond contributes to its hardness? A Weak intermolecular forces B Strong covalent bonds in a tetrahedral network C Its density D Its color
9 David has a container of air. He knows that air is a mixture of gases like nitrogen and oxygen. Based on the states of matter, what is air classified as? A Solid B Liquid C Gas D Plasma
12 Nora is learning about the effect of temperature on gas solubility. She opens a cold soda can and it is more fizzy than a warm one. What is the relationship between gas solubility and temperature? A Gas solubility increases with temperature B Gas solubility decreases with temperature C Gas solubility is not affected by temperature D Gas solubility increases then decreases
13 Uma is studying brass, which is an alloy of copper and zinc. The two metals are mixed together at the atomic level. What type of solution is brass? A Liquid solution B Gaseous solution C Solid solution D Aqueous solution
14 Lara is looking at a diamond ring and a pencil lead. She knows both contain carbon but have very different properties. The pencil lead contains which allotrope of carbon? A Diamond B Graphite C Bucky balls D Graphene
15 Which mixture can be separated by filtration? A Salt solution B Sugar solution C Muddy water D Air
16 Sam is studying a gas that is found in neon signs. The gas glows when electricity passes through it. This state of matter is called: A Gas B Plasma C Liquid D Solid
17 Which of the following is an example of a colloid? A Salt solution B Sugar solution C Milk D Copper sulfate solution
18 Which factor does NOT affect solubility? A Temperature B Pressure C Nature of solute D Color of solute
19 Which of the following is NOT a physical change? A Melting of ice B Boiling of water C Rusting of iron D Freezing of water
20 Amina has a glass of orange juice with pulp. The pulp particles are visible and will eventually settle at the bottom if left undisturbed. This is an example of: A Solution B Colloid C Suspension D Element
21 A saturated solution contains: A No solute B Less solute than required C Maximum solute at given temperature D Excess solute
22 Ibrahim mixes salt and sand together. He can still see individual grains of salt and sand, and he can separate them using a magnet and water. What type of substance is this mixture? A Homogeneous mixture B Compound C Element D Heterogeneous mixture
24 Yusuf is reading about matter and learns that plasma is the most abundant state of matter in the universe. He wants to find an example of plasma. Which of the following is an example of plasma? A Ice B Water vapor C Lightning D Mercury
25 Victor is looking at a glass of milk. He notices that it appears uniform but when he looks closely, he can see tiny particles that scatter light. Milk is an example of which type of mixture? A Solution B Colloid C Suspension D Element
26 Which solution has very small particles that do not settle? A Suspension B Colloid C Heterogeneous mixture D Compound
27 Patricia is examining a sample of matter that has a definite shape and volume. The particles are tightly packed in a regular arrangement. This state of matter is: A Solid B Liquid C Gas D Plasma
28 Increase in temperature usually increases solubility of: A Gases in liquids B Solids in liquids C Liquids in solids D Plasma in gases
29 Khalid is looking at a piece of graphite. He knows that graphite is soft and can be used as a lubricant. Which property of graphite makes it soft and slippery? A Strong covalent bonds in all directions B Weak van der Waals forces between layers of carbon atoms C Its high density D Its electrical conductivity
30 Waseem is studying the properties of matter. He observes that a solid has a fixed shape and volume. What is the arrangement of particles in a solid? A Particles are far apart and move freely B Particles are close but move around each other C Particles are tightly packed in a fixed arrangement and vibrate D Particles are ionized and move freely