The Living Earth A Study Guide

Front

What is the independent variable in an experiment?

Back

The independent variable is the factor that is changed or controlled in a scientific experiment to test its effects on the dependent variable.

Front

What organelle uses sunlight to create stored energy?

Back

Chloroplast

Front

What is the jelly-like substance that fills all cells?

Back

Cytoplasm

Front

Where do plants get the energy they need for photosynthesis?

Back

The sun

Front

What happens to a cell in a hypertonic solution?

Back

Water moves into the cell, causing it to swell.

Front

Define photosynthesis.

Back

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

Front

What is a semipermeable membrane?

Back

A semipermeable membrane is a barrier that allows certain substances to pass through while blocking others.

Front

What is the role of ribosomes in a cell?

Back

Ribosomes are responsible for protein synthesis in the cell.

Front

What is the function of the nucleus in a cell?

Back

The nucleus controls the cell's activities and contains the genetic material (DNA).

Front

What is osmosis?

Back

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