Materials Iron Chlorine Plastics Carbon rubber
metal Conductors shiny Glass electricity transparent
Cooking pans
Use the given words to fill the blanks:
- Stainless steel does not rust and is strong so it can be used for ………………………… and bicycle frames.
- ………………………… are the substances from which objects are made.
- ……………………………..is used for bridges and buildings because it is strong.
- Gold is used for jewellery because it is …………………….
- Copper is used for electrical wiring because it conducts ……………………….. well and it is flexible.
- Metals are good …………………….. of heat.
- The only ………………… that is liquid at room temperature is mercury.
- ………………………………… is used to purify water.
- Sulfur is added to ………………………. to make it hard.
- ……………………. Is used to kill bacteria.
- Plastics can be …………………………… or opaque.
- Glass is …………………………. or translucent.
- …………………………… is also being used in manufacturing beakers and other science equipment.
- ……………………………. are also used to manufacture hose pipes, window frames etc.
- Ceramics can withstand high temperatures.
Multiple Options:
- …………………. can be used for containers for food and drink because they don’t react with food. (A) Plastics (B) Glass (C) Ceramics (D) All of these
True and False Statements:
- Malleable means that they can be drawn into wires. (A) True (B) False
- Ductile means that they can be hammered into shapes. (A) True (B) False
- It takes a very short time for plastics to break down. (A) True (B) False
Short Answers:
- Why are non-metals being used to make coverings of electric cable and electrical appliances? Answer in one sentence using the property of non-metals.
- Why are non-metals being used to make handles of cooking pans? Answer in one sentence using the property of non-metals.
- Name the three metals that are magnetic.
- Write four properties of metals in complete sentences.
- Write four properties of non-metals in complete sentences.
- Write three uses of ceramics in your daily lives.