7th gr Benchmark 2 practice

Front

What is osmosis?

Back

Osmosis is the movement of water molecules through a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

What is the role of the cell membrane?

Back

The cell membrane controls the movement of substances in and out of the cell, maintaining homeostasis.

Front

What happens to plant cells in a hypertonic solution?

Back

In a hypertonic solution, plant cells lose water, causing them to shrink and the plant to wilt.

Front

What is a pure substance?

Back

A pure substance is a material that has a constant composition and consistent properties throughout.

Front

What is the function of cytoplasm in a cell?

Back

Cytoplasm is the jelly-like substance within a cell that holds organelles and is the site for many metabolic reactions.

Front

What is passive transport?

Back

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

Front

What is the difference between diffusion and osmosis?

Back

Diffusion is the movement of particles from an area of high concentration to an area of low concentration, while osmosis specifically refers to the movement of water.

Front

What is a single-celled organism?

Back

A single-celled organism is a living entity that consists of only one cell, such as bacteria or amoebas.

Front

What is the significance of a fixed ratio in compounds?

Back

A fixed ratio in compounds means that the elements in the compound are always present in the same proportion, which defines the compound's identity.

Front

What is the primary function of chloroplasts in plant cells?

Back

Chloroplasts are responsible for photosynthesis, converting light energy into chemical energy in the form of glucose.