7th gr Benchmark 2 practice

Front

What is passive transport?

Back

Passive transport is the movement of substances across a cell membrane without the use of energy, typically moving from areas of higher concentration to areas of lower concentration.

Front

What happens to plant cells when they lose water?

Back

When plant cells lose water, they shrink, causing the plant's leaves and branches to droop.

Front

What is the Law of Conservation of Mass?

Back

The Law of Conservation of Mass states that mass is neither created nor destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.

Front

What role do stomata play in plants?

Back

Stomata are openings on plant leaves that allow for gas exchange; they help regulate water loss and maintain homeostasis.

Front

What is the primary function of the cell membrane?

Back

The primary function of the cell membrane is to control the movement of substances in and out of the cell.

Front

What is a gas in the context of chemical reactions?

Back

A gas is a state of matter that has no fixed shape and can expand to fill its container; in chemical reactions, gases can escape into the air.

Front

What is osmosis?

Back

Osmosis is the diffusion of water across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

What is the significance of potassium ions in plant cells?

Back

Potassium ions help regulate the opening and closing of stomata, which is crucial for maintaining water balance in plants.

Front

What is the difference between reactants and products in a chemical reaction?

Back

Reactants are the starting substances in a chemical reaction, while products are the substances formed as a result of the reaction.

Front

What is the formula for calcium carbonate?

Back

The formula for calcium carbonate is CaCO₃.