Alloy- a mixture of metals. Flexible-can be bent or squashed but when the push or pull force is remove it returns to its original shape. Malleable- it can be shaped by hammering or by pressing. Brittle- can be broken if it is bent or hit. Absorbent- has holes in its surface through which water can pass through. Oasis-is a spring in a desert in which plants grow. Water proof- a material that does not allow water to pass through it. Transparent- a material that allows light to pass through it. Translucent- allows light rays to pas through but the rays are scattered. Opaque-this is a material that does not let light pass through it. Heat conductor- a material that allows heat to pass through it. Heat insulator- a material that does not allow heat to pass through it. Electrical conductor- a material that allows electrical current to flow through it. Electrical insulator- a material that does not allow electrical current to flow through it. Acid- a corrosive liquid that fizzes when it comes in contact with a solid and burn when in contact with skin. The acid in our food is sour. Alkaline- a solution that neutralizes an acid. Ph scale- used to measure how strong or wea a acid or alkaline is. Neutralization- when an acid reacts with an alkaline.