Construct sentences which will express the comparison.(inteligente) albert einstein / homer simpson (famoso) adele / mi hermana (difícil) estudiar química orgánica / leer una novela (malo) el tiempo en boston / el tiempo en florida (barato) los restaurantes elegantes / los restaurantes de comida rápida (viejo) mi abuelo / mi sobrino

The sentences which express comparison with the nouns given are:

Albert Einstein es más inteligente que Homer Simpson.Adele es más famosa que mi hermana.Estudiar química orgánica es más difícil que leer una novela.El tiempo en Boston es tan malo como el tiempo en Florida.Los restaurantes elegantes son menos baratos que los restaurantes de comida rápida.Mi abuelo es más viejo que mi sobrino.

Explanation:

The translation of the sentences is:

Albert Einstein is smarter than Homer Simpson. Adele is more famous than my sister. Studying organic chemistry is more difficult than reading a novel. The weather in Boston is as bad as the weather in Florida. Elegant restaurants are less cheap than fast food restaurants. My grandfather is older than my nephew.

There are regularly three types of comparison that can be implemented:

1. Comparison of superiority: It is used to express that a noun is superior in one characteristic than another and its structure in Spanish is:

Noun + conjugated form "ser" + más + adjective + que + noun.

2. Comparison of equality: it is used to mention that a noun is equal in a given characteristic that another noun, its structure is:

Noun + conjugated form "ser" + tan + adjective + como + noun.

3. Comparison of inferiority: It mentions that a noun is inferior in one characteristic than another, its structure is:

Noun + conjugated form "ser" + menos + adjective + que + noun.

You should only give coherence to the sentence so as not to mention irrational things.

This is not enough information. what exactly is your question