🤗HW29: 12.8

Front

What is photosynthesis?

Back

Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy into chemical energy in the form of glucose, using carbon dioxide and water, and releasing oxygen as a byproduct.

Front

What is passive transport?

Back

Passive transport is the movement of substances across a cell membrane without the use of energy, relying on the concentration gradient.

Front

Define diffusion.

Back

Diffusion is the process by which molecules spread from an area of high concentration to an area of low concentration until they are evenly distributed.

Front

What is a heterogeneous mixture?

Back

A heterogeneous mixture is a combination of two or more substances that remain distinct and can be easily separated, such as a salad.

Front

What are the products of aerobic respiration?

Back

The products of aerobic respiration are carbon dioxide and water.

Front

What is the role of chloroplasts in plant cells?

Back

Chloroplasts are organelles in plant cells that conduct photosynthesis, converting light energy into chemical energy.

Front

What is a chemical change?

Back

A chemical change is a process that involves the transformation of substances into different substances, often accompanied by energy changes.

Front

Give an example of a chemical change in cooking.

Back

Frying eggs is an example of a chemical change, as the proteins in the eggs undergo a chemical transformation.

Front

What are fossil fuels?

Back

Fossil fuels are natural substances formed from the remains of ancient plants and animals that have been buried underground for millions of years.

Front

What is the difference between a cell wall and a cell membrane?

Back

The cell wall is a rigid outer layer found in plant cells that provides structure and protection, while the cell membrane is a flexible barrier that controls the movement of substances in and out of the cell.