5th Grade
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What useful materials are made from clay that is hardened and molded by heat?
Ceramics
What useful materials are used for some common household objects such as windows, doors, and light bulbs?
Glass
What property of matter absorb and retain liquids through small narrow spaces or pores?
Absorbability
What is the property of plastic called?
Versatility
Which of the following can poisonous substances do? a. ignites fire b. induces a cut on the skin c. initiate an electric shock d. irritates the skin
d. Irritates the Skin
Which of the following does not contain toxic chemicals? a. cigarette b. alcohol drink c. liquid bleach d. water
d. Water
What should be used to grab broken glassware? a. eyes b. damp towel or gloves c. feet d. bare hands
b. Damp Towel or Gloves
What changes in matter when a substance changes in appearance, state, or physical properties but no new substance is formed?
Physical Change
What is the conversion of a gas into solid without passing through liquid phase?
Sublimation
What changes in matter is one in which the appearances as well as the composition and properties of the new substance are changed resulting in formation of new substances?
Chemical Change
What is the formation of red-orange coat on the surface of some metals when exposed to oxygen?
Rusting
What is the process when the substance reacts with oxygen to give heat and light?
Burning
What is the process when a substance changes into a less attractive colors when it reacts to oxygen?
Discoloration
What is the process by which organic matter is broken down into simpler form in the presence of oxygen?
Decomposition / Decay
What is the process commonly used in food preparation?
Coagulation
What is the process that results in the formation of new compounds that changes the flavor and the color containing sugar?
Caramelization
What is the chemical process that involves transformation of proteins from liquid to solid form?
Denaturation
What property of materials refers to the anility of a material to withstand scratches and resist deformation?
Hardness
What property of materials are those easily igniting or produce fire if exposed to a source if ignition?
Flammability
What property of materials refers to how harmful a substance can be?
Toxicity
What is the ability of a material to be degraded or broken down into simpler, tiny and harmless parts by the action of living organisms?
Biodegradability