7th Grade Science Review

Front

What is the main cause of fish kills in rivers polluted by fertilizers?

Back

Decreased oxygen levels.

Front

How many mice will be born in week 5 if the trend continues?

Back

160.

Front

Compared to a skin cell, a muscle cell is likely to have more of which organelle?

Back

Mitochondria.

Front

Which is the producer in this food pyramid?

Back

Algae.

Front

What is the correct order of biological organization from simple to complex?

Back

Cells -> tissues -> organs -> systems.

Front

What is the role of mitochondria in a cell?

Back

Mitochondria are the powerhouse of the cell, producing energy.

Front

What is a food chain?

Back

A food chain is a linear sequence of organisms through which nutrients and energy pass as one organism eats another.

Front

What is the difference between a producer and a consumer?

Back

Producers create their own food through photosynthesis, while consumers eat other organisms.

Front

What is photosynthesis?

Back

Photosynthesis is the process by which green plants use sunlight to synthesize foods with the help of chlorophyll.

Front

What is the function of chloroplasts?

Back

Chloroplasts are organelles in plant cells that conduct photosynthesis.