Science 5

Some materials may cause harm when not handled or stored properly. Which of these materials

has the ability to ignite a fire?

• butane

• chlorine

• glass

• scissor

Which household products are used because they are light weight, corrosion resistant, and waterproof?

• ceramics

• fabrics

• papers

• plastics

Materials have different properties. Which property makes some objects float/sink in water?

• elasticity

• density

• flexibility

• hardness

Which of these materials exhibits elasticity and is mostly used to manufacture tires?

• aluminium

• rubber

• wire

• wood

Metals and water are good conductors of heat and electricity. Which materials readily conduct heat?

• cloths

• foams

• metals

A car may not look the same after 15 years due to the formation of iron oxide.

Iron oxide is more commonly known as _________.

• dew

• fog

• molds

• rust

Orange powder in a cold water makes a good refreshing drink during hot days. Which of the

following is the solute in the mixture?

• orange peeling

• orange pulp

• orange powder

• water

Fabrics are materials made from artificial or natural fibers woven together. Which of the following

is a household material that is made up of woven fibers?

• ceramic

• glass

• plastic

• silk

Which group of materials can be decomposed by bacteria?

• glasses, batteries, tires

• paints, brushes, slippers

• plastics, styrofoams, cans

• fruit peelings, dried leaves, leftover foods

Plastics are non-biodegradable materials. Which things in the surroundings take a longer time to rot?

• batteries

• food cartons

• papers

• vegetable scraps