Question

1. according to the passage, why are metals often chosen for brid

metals often chosen for bridges because they are
and electricity

1. which material is a mixture designed to improve properties?

a) polymer b) alloy c) ceramic d) composite

1. explain one advantage of composites over single materials.

Explanation:

Step1: Answer question 1

Metals are strong and have good conductivity, which are useful properties for bridges. However, the answer in the picture is incomplete. A more complete answer could be: Metals are often chosen for bridges because they are strong (able to bear heavy loads) and have good conductivity (useful for electrical - related aspects like lightning protection in some cases).

Step2: Answer question 2

An alloy is a mixture of two or more metals or a metal and a non - metal designed to improve properties such as strength, corrosion resistance etc. So the answer is b) Alloy.

Step3: Answer question 3

Composites can combine the advantages of different materials. For example, they can be stronger and lighter than single materials. They can be tailored to have specific properties by varying the composition and arrangement of their components.

Answer:

1. Metals are often chosen for bridges because they are strong and have good conductivity.
2. b) Alloy
3. Composites can be stronger and lighter than single materials.